Thermal management method and device of vehicle power battery, electronic equipment and storage medium

Abstract

The invention discloses a thermal management method and device for a vehicle power battery, electronic equipment and a storage medium. The method comprises the steps that in response to connection of a vehicle and a charging pile, the environment temperature of the environment where the vehicle is located and the battery temperature of a power battery of the vehicle are obtained; based on the environment temperature and the battery temperature, determining a heat preservation starting moment and a heat preservation ending moment; and performing battery heat preservation on the power battery based on the heat preservation starting moment and the heat preservation ending moment. According to the invention, the technical problems of low accuracy and flexibility of thermal management of the vehicle power battery in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a vehicle power battery thermal management method and device, electronic equipment and storage medium. BACKGROUND

[0002] With the development of new energy vehicles, good thermal management of power batteries helps to ensure vehicle performance and safety. The fluctuation of environmental temperature, and in extreme conditions, has a significant impact on battery performance. At high temperatures, battery capacity accelerates degradation, and cycle life is shortened. At low temperatures, the flowability of electrolyte is limited, and the reaction rate of active materials is reduced, resulting in reduced battery energy, increased internal resistance, reduced vehicle range, and even inability to start in cold winter conditions, which seriously affects user experience and battery life.

[0003] The battery thermal management strategy in the related art, such as battery plug-in heat preservation, is a passive wake-up after charging is completed, which relies on the estimation of the battery temperature falling below a certain threshold, and is limited to heat preservation after charging is completed, resulting in low accuracy and flexibility of the related art in thermal management of vehicle power batteries.

[0004] To address the above problems, no effective solutions have been proposed so far. SUMMARY

[0005] The embodiments of the present application provide a vehicle power battery thermal management method, device, electronic equipment and storage medium to at least solve the technical problems of low accuracy and flexibility of the related art in thermal management of vehicle power batteries.

[0006] According to an aspect of an embodiment of the present application, a vehicle power battery thermal management method is provided, comprising: in response to a vehicle being connected to a charging pile, obtaining an environmental temperature of an environment in which the vehicle is located and a battery temperature of a power battery of the vehicle; determining a heat preservation start time and a heat preservation end time based on the environmental temperature and the battery temperature; and performing battery heat preservation on the power battery based on the heat preservation start time and the heat preservation end time.

[0007] In the embodiment of the present application, the determination of the heat preservation start time and the heat preservation end time based on the environmental temperature and the battery temperature comprises: in response to receiving a preset charging start time of the vehicle, determining a first time interval between a current time and the preset charging start time; determining a heat preservation end temperature based on the environmental temperature and the first time interval, wherein the heat preservation end temperature is used to represent a temperature that the power battery needs to reach at the heat preservation end time; and determining the heat preservation start time and the heat preservation end time based on the battery temperature, the current time and the heat preservation end temperature.

[0008] In the embodiment of the present application, the start time and the end time of the battery thermal insulation are determined based on the ambient temperature and the battery temperature, and the method comprises the following steps: in response to receiving a preset vehicle use time, determining a second time interval between the current time and the preset vehicle use time; determining a thermal insulation end temperature based on the ambient temperature and the second time interval; determining the start time and the end time of the battery thermal insulation based on the battery temperature, the current time and the thermal insulation end temperature.

[0009] In the embodiment of the present application, the start time and the end time of the battery thermal insulation are determined based on the ambient temperature and the battery temperature, and the method comprises the following steps: in response to receiving the power load characteristic data, in the case that the power load characteristic data comprises a power valley start time, determining a third time interval between the current time and the power valley start time, wherein the power load characteristic data is used to represent the peak and valley characteristics of the power load in the area where the charging pile is located; determining a thermal insulation end temperature based on the ambient temperature and the third time interval; determining the start time and the end time of the battery thermal insulation based on the battery temperature, the current time and the thermal insulation end temperature.

[0010] In the embodiment of the present application, the method further comprises the following steps: in the case that the power load characteristic data comprises a power valley end time, determining a fourth time interval between the current time and the power valley end time; determining a next thermal insulation start temperature based on the ambient temperature and the fourth time interval, wherein the next thermal insulation start temperature is used to represent the battery temperature of the power battery when the battery thermal insulation is started next time; determining the start time and the end time of the battery thermal insulation based on the battery temperature, the current time and the next thermal insulation start temperature.

[0011] In the embodiment of the present application, the start time and the end time of the battery thermal insulation are determined based on the battery temperature, the current time and the next thermal insulation start temperature, and the method comprises the following steps: determining a thermal insulation end temperature based on the ambient temperature, the battery temperature and the next thermal insulation start temperature; determining the start time and the end time of the battery thermal insulation based on the battery temperature, the current time and the thermal insulation end temperature.

[0012] In the embodiment of the present application, the battery thermal insulation is performed on the power battery based on the start time and the end time of the battery thermal insulation, and the method comprises the following steps: in the case that the battery thermal insulation instruction is to perform battery heating thermal insulation on the power battery, controlling the vehicle water heating thermistor to perform battery heating thermal insulation on the power battery based on the start time and the end time of the battery thermal insulation; in the case that the battery thermal insulation instruction is to perform battery cooling thermal insulation on the power battery, controlling the vehicle air conditioner compressor to perform battery cooling thermal insulation on the power battery based on the start time and the end time of the battery thermal insulation.

[0013] According to another aspect of the embodiments of the present application, a thermal management device of a vehicle power battery is also provided, comprising: an obtaining module, configured to obtain an ambient temperature of an environment where the vehicle is located and a battery temperature of a power battery of the vehicle in response to the vehicle being connected to a charging pile; a determining module, configured to determine a heat preservation start time and a heat preservation end time based on the ambient temperature and the battery temperature; and a heat preservation module, configured to perform battery heat preservation on the power battery based on the heat preservation start time and the heat preservation end time.

[0014] According to another aspect of the embodiments of the present application, an electronic device is also provided, comprising: a memory storing an executable program; and a processor configured to run the program, wherein the program, when running, performs the method in the embodiments of the present application.

[0015] According to another aspect of the embodiments of the present application, a computer readable storage medium is also provided, comprising a stored executable program, wherein the executable program, when running, controls a device where the computer readable storage medium is located to perform the method in the embodiments of the present application.

[0016] According to another aspect of the embodiments of the present application, a computer program product is also provided, comprising a computer program, wherein the computer program, when executed by a processor, implements the method in the embodiments of the present application.

[0017] According to another aspect of the embodiments of the present application, a computer program product is also provided, comprising a non-volatile computer readable storage medium, wherein the non-volatile computer readable storage medium stores a computer program, and the computer program, when executed by a processor, implements the method in the embodiments of the present application.

[0018] According to another aspect of the embodiments of the present application, a computer program is also provided, wherein the computer program, when executed by a processor, implements the method in the embodiments of the present application.

[0019] In the embodiment of the present application, first, in response to the connection of the vehicle and the charging pile, the ambient temperature of the environment where the vehicle is located and the battery temperature of the power battery of the vehicle are obtained; then, based on the ambient temperature and the battery temperature, the heat preservation start time and the heat preservation end time are determined; finally, based on the heat preservation start time and the heat preservation end time, the battery heat preservation of the power battery is performed. By responding to the connection of the vehicle and the charging pile, the present application is applicable to the application scenario of vehicle gun insertion heat preservation, and the ambient temperature and the battery temperature are obtained in real time, which provides a data basis for intelligent decision-making, can ensure that the battery thermal management process can quickly adapt to environmental changes, can timely call the ambient temperature and the battery temperature for analysis, based on the ambient temperature and the battery temperature, the heat preservation start time and the heat preservation end time are determined, the heat preservation period is dynamically determined, the heat preservation operation can ensure that the battery is in a better working state when the user needs it, and the intelligent matching improves the accuracy and flexibility of thermal management, can respond to the change of the ambient temperature and the actual state of the battery in real time, intelligently and dynamically adjusts the heat preservation period, based on the heat preservation start time and the heat preservation end time, the battery heat preservation of the power battery is started and stopped at the appropriate time, unnecessary energy consumption is avoided, and the battery performance is ensured, thereby solving the technical problems of low accuracy and flexibility of the thermal management of the vehicle power battery in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0021] Figure 1 is a flowchart of a vehicle power battery thermal management method according to an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of an optional vehicle power battery thermal management process according to an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of an optional vehicle thermal management hardware device connection according to an embodiment of the present application;

[0024] Figure 4 is a schematic diagram of an optional power battery heat preservation by heating or cooling according to an embodiment of the present application;

[0025] Figure 5 is a schematic diagram of a vehicle power battery thermal management device according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort should fall within the protection scope of the present application.

[0027] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] According to an aspect of the embodiments of the present application, a thermal management method of a vehicle power battery is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0029] Figure 1 is a flowchart of a thermal management method of a vehicle power battery according to an embodiment of the present application, as Figure 1 shown, the method comprises the following steps:

[0030] Step S102, in response to the connection of the vehicle and the charging pile, the ambient temperature of the environment where the vehicle is located and the battery temperature of the power battery of the vehicle are obtained.

[0031] The charging pile described above can refer to a new energy vehicle power supply device, which can be a device for providing power to the power battery of the vehicle. According to different charging methods, it can be divided into alternating current charging pile and direct current charging pile. The alternating current charging pile can convert alternating current into direct current through the vehicle-mounted charger, and then input the direct current to the power battery for charging; the direct current charging pile can directly output direct current to quickly charge the power battery of the vehicle. In the thermal management strategy of the present application, the charging pile can be used as an external power supply, so that the vehicle can also perform the battery temperature maintaining program without starting the engine.

[0032] The ambient temperature can refer to the real-time temperature of the environment in which the vehicle is located, and can include but is not limited to outdoor temperature, indoor temperature of a garage, or ambient temperature of a location where a charging pile is located. The ambient temperature can affect the performance of the power battery. When the ambient temperature is low, the internal chemical reaction speed of the battery slows down, resulting in reduced battery efficiency, and additional heating is required to maintain a better working state. When the ambient temperature is too high, the battery will overheat, and thus a cooling system needs to be involved to avoid rapid degradation of battery performance and potential safety problems.

[0033] The battery temperature can refer to the temperature inside the power battery, and can refer to the temperature of the battery core. The power battery generates heat during charging and discharging, and the battery temperature affects the charging and discharging performance and safety of the battery. High battery temperature can accelerate battery aging and shorten battery life, and low battery temperature can reduce the charging and discharging efficiency and power output of the battery.

[0034] In an optional embodiment, when the vehicle establishes a connection with the charging pile, the vehicle control unit can start a communication protocol with the charging pile to confirm the status of the charging pile. The charging pile can transmit its location information and current ambient temperature data to the vehicle. At the same time, the battery management system can continuously monitor the temperature of the power battery, including the temperature of the battery core and the surface temperature of the battery. These data can be transmitted to the central gateway through the vehicle network, and then distributed to the vehicle control unit and other related controllers by the central gateway. The vehicle control unit can determine whether the battery temperature regulation function needs to be started according to the received ambient temperature and battery temperature, in combination with the preset battery temperature regulation threshold. If it is determined that temperature regulation is needed, the vehicle control unit can send a temperature regulation instruction to the battery management unit, which can calculate the required heating or cooling time and power according to the difference between the current battery temperature and the preset target temperature, and then feed back the required power information to the vehicle control unit. The vehicle control unit can further communicate with the on-board charger to request the charging pile to provide the required power, and at the same time adjust the working mode of the air conditioning controller to start the heating or cooling function, thereby achieving temperature regulation of the battery.

[0035] In the above process, by obtaining the ambient temperature and battery temperature in time when connecting to the charging pile, the battery temperature regulation function can be started in time to respond to changes in the external environment and avoid sudden decline in battery performance under harsh environmental conditions. At the same time, through real-time communication with the charging pile, the peak and valley electricity price changes in different regions can be better adapted to, further saving electricity costs and enhancing user experience.

[0036] Step S104, determining the temperature regulation start time and temperature regulation end time based on the ambient temperature and the battery temperature.

[0037] The warming-up start time can be determined by the vehicle control unit according to the current ambient temperature and the battery temperature. The warming-up start time can be determined based on a series of algorithms and preset conditions, aiming to ensure that the battery temperature can reach and remain in an ideal range before the subsequent scheduled event, such as scheduled charging or vehicle use, to ensure the better performance and efficiency of the battery. The determination of the warming-up start time can take into account the current battery temperature state, the trend of the ambient temperature, the expected temperature change rate, and the energy consumption required for battery warming-up, etc.

[0038] The warming-up end time can be determined by the vehicle control unit according to the current battery temperature and the change of the ambient temperature. It can occur when the battery temperature has reached or is close to the predetermined ideal temperature, or is about to reach the next scheduled event, such as the start or end of scheduled charging, vehicle driving time, etc. The setting of the warming-up end time can be based on a series of algorithms to ensure the performance of the battery while saving energy as much as possible, avoiding potential damage to the battery caused by excessive heating or cooling, and reducing the energy consumption cost during the warming-up process.

[0039] In an optional embodiment, after receiving the charging pile connection signal, the battery management system of the vehicle can read the ambient temperature provided by the environmental sensor and query the battery temperature recorded in the battery management system. Then, the warming-up strategy calculation can be performed, the future temperature change of the battery can be predicted, and the warming-up start time and the warming-up end time can be determined.

[0040] The vehicle control unit can evaluate the difference between the current battery temperature and the ambient temperature, and consider the temperature change trend, and calculate the time required for the battery temperature to naturally change to the ideal interval, i.e. the heating target temperature or the cooling target temperature, through historical data or a pre-set model. Secondly, the vehicle control unit can integrate the user's preset charging or vehicle use time, the local power load characteristics, and the current charging state of the battery, etc. Based on these data, the warming-up period that can meet the battery temperature requirements and run during the power valley period can be determined. For example, if the ambient temperature is lower than the optimal working temperature of the battery, and the user sets a scheduled charging time, the time required for the battery to heat from the current temperature to the target temperature can be calculated, and it is ensured that this heating process is completed within a sufficient time before the scheduled charging starts, and it is tried to be carried out during the power valley period to save energy cost. If the ambient temperature is too high and the user schedules a certain time point for vehicle use, the battery cooling can be stopped appropriately before the scheduled time point to allow the battery to naturally recover to a suitable temperature, avoiding energy waste caused by excessive cooling.

[0041] In the above process, by accurately calculating the heat preservation start time and the heat preservation end time, the heating or cooling of the battery at unnecessary time can be effectively avoided, and the energy consumption of the battery during the heat preservation process can be significantly reduced.

[0042] In step S106, the power battery is subjected to battery heat preservation based on the heat preservation start time and the heat preservation end time.

[0043] In an optional embodiment, after the heat preservation start time and the heat preservation end time are determined, accurate heat preservation control can be performed on the power battery. This includes coordinating the work of multiple subsystems to ensure that the battery temperature is stable within the preset ideal range, so as to improve the performance and service life of the battery. Specifically, when the heat preservation start time is reached, the vehicle control unit can determine whether to start heating or cooling based on the difference between the real-time battery temperature reported by the battery management system and the target temperature. If the battery temperature is lower than the target range, the vehicle control unit can send a request to the on-board charger to obtain energy from the charging pile and circulate warm water in the cooling circuit through the vehicle water heating thermistor or electric water pump to increase the battery temperature. The vehicle control unit can continuously monitor the battery temperature and adjust the power of the battery heating or the speed of the water pump according to the temperature feedback to avoid overheating of the battery and ensure safe operation of the battery. If the battery temperature is higher than the target range, the vehicle control unit can send an instruction to the air conditioner controller to start the air conditioner compressor for cooling treatment to reduce the battery temperature. During the cooling process, the vehicle control unit can dynamically adjust the working strength of the compressor according to the change of the battery temperature to ensure that the battery temperature smoothly decreases to the ideal range, while avoiding excessive consumption of energy and excessive cooling of the battery. During the entire heat preservation process, the remote intelligent terminal can be responsible for waking up the vehicle at regular intervals to check the battery temperature. When the battery temperature reaches the preset heat preservation end temperature, the battery management system can stop requesting the vehicle control unit to continue heat preservation, and the vehicle control unit immediately executes the heat preservation exit process to turn off the heater, water pump or air conditioner compressor, cut off the energy exchange with the charging pile, and stop the heat preservation program. The target temperature of this heating or cooling can also be intelligently adjusted according to the expected demand of the next heat preservation period to reduce the start frequency of future heat preservation periods and achieve more efficient energy utilization.

[0044] In the above process, the target temperature of the heat preservation is dynamically adjusted to ensure that the battery temperature is always in the optimal working range, which improves the performance of the battery under various environmental temperatures, prolongs the service life of the battery, and avoids the impact of frequent temperature changes on the health of the battery.

[0045] In the embodiment of the present application, first, in response to the connection of the vehicle and the charging pile, the ambient temperature of the environment where the vehicle is located and the battery temperature of the power battery of the vehicle are obtained; then, based on the ambient temperature and the battery temperature, the heat preservation start time and the heat preservation end time are determined; finally, based on the heat preservation start time and the heat preservation end time, the battery heat preservation is performed on the power battery. By responding to the connection of the vehicle and the charging pile, the present application is applicable to the application scenario of vehicle gun insertion heat preservation, and the ambient temperature and the battery temperature are obtained in real time, which provides a data basis for intelligent decision-making, can ensure that the battery heat management process can quickly adapt to environmental changes, can timely call the ambient temperature and the battery temperature for analysis, based on the ambient temperature and the battery temperature, the heat preservation start time and the heat preservation end time are determined, the heat preservation period is dynamically determined, the heat preservation operation can ensure that the battery is in a better working state when the user needs it, and the intelligent matching improves the accuracy and flexibility of heat management, can respond to the change of the ambient temperature and the actual state of the battery in real time, intelligently and dynamically adjusts the heat preservation period, based on the heat preservation start time and the heat preservation end time, the power battery heat preservation is started and stopped at the appropriate time, unnecessary energy consumption is avoided, and the battery performance is ensured, thereby solving the technical problems of low accuracy and flexibility of the battery heat management in the related art.

[0046] In the embodiment of the present application, based on the ambient temperature and the battery temperature, the heat preservation start time and the heat preservation end time are determined, including: in response to receiving the preset charging start time of the vehicle, determining the first distance time between the current time and the preset charging start time; based on the ambient temperature and the first distance time, determining the heat preservation end temperature, wherein the heat preservation end temperature is used to represent the temperature that the power battery needs to reach at the heat preservation end time; based on the battery temperature, the current time and the heat preservation end temperature, determining the heat preservation start time and the heat preservation end time.

[0047] The above-mentioned preset charging start time can be the charging start time set by the user through the intelligent terminal of the vehicle or the remote control application. The preset charging start time can be set based on the user's daily schedule, energy saving consideration of power valley period or intelligent suggestion of the battery state of the vehicle.

[0048] The above-mentioned first distance time can be the time difference between the current time and the preset charging start time. It can affect the determination of how long the battery temperature needs to be adjusted to the ideal state.

[0049] The above-mentioned heat preservation end temperature can be the ideal temperature that the power battery needs to reach at the heat preservation end time, which can be calculated based on the first distance time between the current ambient temperature and the preset charging start time. The setting of the heat preservation end temperature can ensure that the battery is in a suitable temperature range before charging starts, so as to improve the charging efficiency and the battery performance.

[0050] In an optional embodiment, when the intelligent terminal receives the preset charging start time set by the user, the vehicle control unit can calculate a first time interval between the current time and the preset charging start time. This calculation can be based on the real-time time information of the vehicle and the charging start time set by the user. Subsequently, the vehicle control unit can determine the holding end temperature that the battery should reach before charging by using a pre-set algorithm or model in combination with the current ambient temperature and the first time interval. This strategy takes into account the speed of the ambient temperature on the battery temperature and the expected temperature change within the first time interval. For example, in a low-temperature environment, if the preset charging start time is far from the current time, the vehicle control unit will set a higher holding end temperature to ensure that the battery is close to the lower limit of the battery allowable temperature before charging. If the current ambient temperature is high and the preset charging start time is near, the vehicle control unit will set a lower holding end temperature to avoid overheating of the battery before charging starts. After determining the holding end temperature, the vehicle control unit can calculate the holding start time in combination with the current battery temperature and the first time interval. To ensure that the next holding start temperature should be reached at the scheduled charging start time, the power load characteristics and the valley electricity price period can also be considered to achieve the goal of minimizing energy consumption.

[0051] In the above process, the intelligent holding strategy based on the preset charging start time and the current ambient temperature ensures that the battery is in an ideal temperature state before charging, avoiding the decline in charging efficiency in low-temperature environments and battery overheating in high-temperature environments, thereby improving the charging speed and battery health. The user can freely set the charging time, so that the holding strategy can be automatically adjusted to meet the user's needs without additional user operations, improving the convenience and satisfaction of the user's vehicle use.

[0052] In the embodiments of the present application, based on the ambient temperature and the battery temperature, the holding start time and the holding end time are determined, including: in response to receiving the preset vehicle use time of the vehicle, determining a second time interval between the current time and the preset vehicle use time; determining the holding end temperature based on the ambient temperature and the second time interval; determining the holding start time and the holding end time based on the battery temperature, the current time and the holding end temperature.

[0053] The above-mentioned preset vehicle use time can refer to the vehicle use time set by the user through the intelligent terminal or the user interface of the vehicle. The preset vehicle use time can be set based on the user's travel plan, schedule or vehicle prediction usage mode. The setting of the preset vehicle use time provides a clear time target for the thermal management system of the vehicle, so as to adjust the battery temperature to a better state within a certain time period, ensuring that the battery can perform better when the user needs to use the vehicle.

[0054] The second time interval can be a time difference between the current time and the preset use time set by the user. The second time interval can affect the formulation of the battery temperature maintenance strategy, including the start time of the temperature maintenance program, the duration of heating or cooling, and the end time of temperature maintenance.

[0055] In an optional embodiment, when the intelligent terminal of the vehicle receives the preset use time set by the user, the vehicle control unit can calculate a second time interval between the current time and the preset use time. Based on the second time interval and the current ambient temperature, the vehicle control unit can use a pre-set algorithm or model to determine the temperature maintenance end temperature, i.e., the temperature that the power battery needs to reach before the user uses the vehicle, to ensure that the battery is in an optimal working state at the preset use time.

[0056] Then, the vehicle control unit can determine the temperature maintenance start time and the temperature maintenance end time of the battery temperature maintenance program based on the current battery temperature, the current time, and the calculated temperature maintenance end temperature. This process can include temperature prediction and adjustment of the battery thermal management strategy, aiming to ensure that the battery temperature smoothly rises or falls to the preset temperature maintenance end temperature, while also taking into account the power valley period and the time window of the scheduled use, to achieve efficient use of energy and minimize costs. For example, in a low-temperature environment, if the second time interval is large, the hibernation cooling time after heating is longer, and the temperature maintenance end temperature needs to be higher to ensure that the battery temperature is in a suitable range when the vehicle preheating starts. When the second time interval is small, the temperature maintenance end temperature will be lower, and the battery may even skip this heating to avoid unnecessary heating of the battery at non-essential times, causing energy waste.

[0057] In the above process, through the adjustment of the temperature maintenance strategy based on the preset use time and the current ambient temperature, the power battery is ensured to be close to the lower limit of the allowable temperature at the user's preset use time, to prevent the battery temperature from being too high, causing the battery to need to be cooled, thereby improving the battery's start response speed, output power, and overall efficiency, enhancing the vehicle's driving performance and user satisfaction. Avoiding the sharp change of the battery temperature before and after use, reducing the battery thermal stress, helps to prolong the service life of the battery and reduce the maintenance and replacement costs.

[0058] In the embodiments of the present application, based on the ambient temperature and the battery temperature, the temperature maintenance start time and the temperature maintenance end time are determined, including: in response to receiving the power load characteristic data, determining a third time interval between the current time and the power valley start time in the case that the power load characteristic data includes the power valley start time, wherein the power load characteristic data is used to represent the peak and valley characteristics of the power load in the area where the charging pile is located; determining the temperature maintenance end temperature based on the ambient temperature and the third time interval; determining the temperature maintenance start time and the temperature maintenance end time based on the battery temperature, the current time, and the temperature maintenance end temperature.

[0059] The power load characteristic data can reflect the load variation law of a certain regional power system, and can include the characteristics of power valleys and peaks. In the electric vehicle charging scenario, the power load characteristic data can be related to the power cost and grid stability during charging. The power load characteristic data of the region where the charging pile is located can be provided from the public information of the power company, or can be obtained through historical data analysis, which can include the specific start and end times of the valley and peak periods, the power price change curve, the power supply capacity, and other information.

[0060] The power valley opening time can be the start time of the period with lower electricity price or more abundant power supply indicated in the power load characteristic data. During the valley period, the battery is kept warm, which can enjoy lower electricity cost and reduce the pressure on the power grid. At this time, the power demand is low, and the power grid has enough margin to meet the charging demand.

[0061] The third distance duration can be the time difference between the current time and the power valley opening time. The calculation of the third distance duration helps to intelligently adjust the battery warm-up strategy, which affects when the warm-up program starts and the length of the warm-up period, ensuring that the warm-up process can be carried out during the power valley period, thereby saving energy costs.

[0062] In an optional embodiment, when the remote intelligent terminal of the vehicle receives new power load characteristic data, and the power load characteristic data includes the power valley opening time, the vehicle control unit can calculate the third distance duration between the current time and the next power valley opening time. Then, based on the third distance duration and the ambient temperature, the vehicle control unit can predict the trend of the battery temperature, and then determine the appropriate warm-up end temperature. Subsequently, the vehicle control unit can determine the warm-up start time and the warm-up end time based on the battery temperature, the third distance duration, and the warm-up end temperature. This process can take into account the energy required for battery warm-up, the influence of ambient temperature, and the use of valley period, aiming to ensure efficient and energy-saving battery warm-up. For example, if the ambient temperature is low and the third distance duration is short, the last time before the power valley starts, the heating before the valley can be reduced, but the distance from the valley is relatively far. In this case, the warm-up end temperature is low, the cooling is fast, and the heating frequency needs to be increased, which has little effect on energy consumption. Therefore, only the warm-up end temperature of the last heating can be reduced, and a lower preliminary heating target temperature can be set to fully utilize low-cost electricity. To ensure that most of the warm-up work is completed during the period with lower electricity price, thereby ensuring the battery temperature while maximizing economic benefits.

[0063] In the above process, by intelligently responding to the power load characteristic data and the power valley opening time, the heat preservation control strategy is proposed, the heat preservation process is mainly carried out in the power valley period, which can significantly reduce the energy cost of charging and heat preservation, and save the cost for the user. The intelligent matching of battery heat preservation and power load characteristics is realized, the automation level and response speed of the thermal management system are improved, the need for human intervention is reduced, and the overall efficiency and reliability of the battery thermal management process are enhanced.

[0064] In the embodiment of the application, the method further comprises: in the case that the power load characteristic data comprises a power valley end time, determining a fourth distance duration between the current time and the power valley end time; determining a next heat preservation opening temperature based on the ambient temperature and the fourth distance duration, wherein the next heat preservation opening temperature is used to represent the battery temperature of the power battery when the battery heat preservation of the power battery is opened next time; determining the heat preservation opening time and the heat preservation end time based on the battery temperature, the current time and the next heat preservation opening temperature.

[0065] The power valley end time described above can refer to the time point indicated in the power load characteristic data that the electricity price returns to normal or starts to rise, marking the end of the power valley period. The power valley end time can indicate the cut-off time of using low-cost electricity and the charging period facing higher electricity prices subsequently.

[0066] The fourth distance duration described above can refer to the time difference between the current time and the power valley end time. The calculation of the fourth distance duration can be based on the real-time power load characteristic data received by the vehicle, which can be used to guide the thermal management system to adjust the heat preservation strategy, to ensure that the temperature of the battery can reach or maintain at a better heat preservation end temperature before the end of the power valley, so as to avoid starting heat preservation in the peak period of high electricity price, and increase unnecessary energy consumption and cost.

[0067] The next heat preservation opening temperature described above can refer to the temperature that the power battery should reach when the heat preservation program is started next time after the current heat preservation period ends. The setting of the next heat preservation opening temperature can affect the length of the heat preservation period and the efficiency of the heat preservation strategy. The next heat preservation opening temperature can be intelligently determined based on the ambient temperature and the fourth distance duration, to balance the relationship between battery temperature management and energy cost.

[0068] In an alternative embodiment, when the remote intelligent terminal obtains new power load characteristic data, in the case that the power load characteristic data includes the end time of the power valley, the vehicle control unit can calculate a fourth distance duration between the current time and the end time of the power valley. Based on the fourth distance duration and the ambient temperature, the vehicle control unit can predict the trend of the battery temperature change and determine the target battery temperature of the power battery at the next time of opening the heat preservation. This process can find the balance point between the battery temperature and the power cost. For example, if the fourth distance duration is short and the ambient temperature is low, the vehicle control unit can set the next time of opening the heat preservation temperature to be slightly higher, to ensure that the battery temperature can reach and maintain at this temperature before the end of the power valley, to avoid entering the peak period of higher power price. If the fourth distance duration is long, a higher heat preservation opening temperature can be set to increase the heating once, to realize that the battery temperature at the end of the power valley is at a high level, to efficiently utilize the valley power.

[0069] In the above process, the heat preservation strategy adjustment based on the end time of the power valley, by accurately calculating the next time of opening the heat preservation temperature, ensures that the battery heat preservation operation can be completed within the power valley period, fully utilizes the low-cost power resources, and reduces the energy consumption cost of charging and heat preservation. The next time of opening the heat preservation temperature is intelligently set, which can ensure the battery performance while avoiding starting the heat preservation in the peak period of high power price, to realize a good balance between the battery temperature management and energy saving.

[0070] In the embodiment of the application, based on the battery temperature, the current time and the next time of opening the heat preservation, the heat preservation opening time and the heat preservation end time are determined, including: based on the ambient temperature, the battery temperature and the next time of opening the heat preservation, the heat preservation end temperature is determined; based on the battery temperature, the current time and the heat preservation end temperature, the heat preservation opening time and the heat preservation end time are determined.

[0071] In an optional embodiment, after the next warm-up start temperature is determined, the vehicle control unit can comprehensively consider the ambient temperature and the battery temperature to calculate the warm-up end temperature. The calculation of the warm-up end temperature can be combined with the characteristics of the battery material, the rate of change of the ambient temperature, and the time span of the warm-up period. For example, in a low-temperature environment, if the current battery temperature is close to the ambient temperature and the next warm-up start temperature requires a higher temperature, the vehicle control unit can set a target higher than the regular warm-up end temperature to ensure that the battery temperature can be maintained within the high-efficiency working range between two warm-up periods without rapidly dropping to a temperature that requires the warm-up to be started again. Based on the calculated warm-up end temperature and the battery temperature, the vehicle control unit can further determine the warm-up start time and the warm-up end time. In this process, the vehicle control unit can consider the speed of battery heating or cooling, the relationship between the current time and the power valley period, and the need to ensure that the battery reaches the preset target temperature at the end of the warm-up. For example, if there is still a long time to the end of the power valley, the vehicle control unit can choose to start the warm-up program at the beginning of the valley to gradually adjust the battery temperature to the warm-up end temperature and complete the warm-up period before the end of the power valley. In this way, the energy consumption is minimized while ensuring that the battery is in a good state at the end of the warm-up period.

[0072] In the above process, the warm-up end temperature is dynamically adjusted to adapt to environmental changes and user needs, ensuring that the battery is maintained in a good working state while minimizing energy consumption. This reduces the cost of charging and improves energy utilization efficiency. Dynamic adjustment of the warm-up end temperature based on the ambient temperature, the current and next warm-up start temperature enables the thermal management system to flexibly adjust the warm-up strategy under different environmental conditions, enhancing the adaptability and overall performance of battery thermal management.

[0073] In the embodiment of the present application, based on the warm-up start time and the warm-up end time, the battery is warmed up, including: in the case of battery warm-up instruction for battery heating warm-up of the power battery, based on the warm-up start time and the warm-up end time, the vehicle water heating thermistor is controlled to perform battery heating warm-up of the power battery; in the case of battery warm-up instruction for battery cooling warm-up of the power battery, based on the warm-up start time and the warm-up end time, the vehicle air conditioner compressor is controlled to perform battery cooling warm-up of the power battery.

[0074] The vehicle water heating thermistor can be used to heat the coolant around the battery pack, thereby indirectly heating the power battery. High-voltage electricity can be used as the power source, and the temperature of the coolant can be adjusted by the heating principle of the thermistor. The thermistor has the characteristic that the resistance changes with temperature, which enables precise control of the heating power according to the instructions of the vehicle control unit, thereby achieving the purpose of effectively heating and keeping the battery pack. In the heating mode, the vehicle control unit can control the working state of the thermistor according to the heating start time and the heating end time, to ensure that the power battery is kept within the appropriate temperature range during the specified heating period.

[0075] The vehicle air conditioning compressor can be used in an electric vehicle air conditioning system to compress the refrigerant. In the case of battery cooling and heating, the compressor can be used to reduce the temperature of the coolant around the battery pack, thereby indirectly cooling the power battery and preventing the battery from overheating. The vehicle control unit can control the working state of the air conditioning compressor according to the battery temperature, the current time, and the heating end time, to ensure that the power battery is maintained within the optimal operating temperature range during the heating period, thereby avoiding performance degradation or shortened life due to overheating or overcooling of the battery.

[0076] In an optional embodiment, after the vehicle control unit receives the battery heating instruction, it determines whether to heat or cool the battery, and can start the corresponding thermal management strategy based on the calculated heating start time and heating end time. Specifically, if the battery heating instruction indicates that the power battery is to be heated, the vehicle control unit can send a control signal to the vehicle water heating thermistor to adjust the heating power of the thermistor, to ensure that the battery temperature rises smoothly to the heating end temperature between the heating start time and the heating end time, while taking into account the time period of the valley electricity price to minimize costs. In the case of cooling, the vehicle control unit can control the air conditioning compressor to adjust the working state of the air conditioning compressor, to ensure that the battery temperature is stable within the set low temperature range during the heating period, and the use of valley electricity can also be considered to reduce energy consumption during cooling.

[0077] In the above process, the vehicle water heating thermistor and the air conditioning compressor are precisely controlled to heat or cool the power battery according to the heating start time and the heating end time. The thermistor and the air conditioning compressor can precisely adjust the heating or cooling power according to the instructions of the vehicle control unit, to ensure that the power battery is maintained within the optimal temperature range during the heating period, thereby improving the performance and service life of the battery. The existing water heating system and air conditioning system of the vehicle are used to adjust the battery temperature, avoiding the addition of extra hardware and reducing the complexity and cost of the battery thermal management system.

[0078] The technical scheme proposed in the application is described below in combination with an optional embodiment. The application proposes a thermal management strategy, method and vehicle for a power battery. The target temperature of the current heating and the starting temperature of the next heating are adjusted to intelligently adjust the battery holding period, so that the heating period is in the trough stage as much as possible and before the reservation of the vehicle, and the optimal performance is achieved with less energy consumption. The thermal management strategy, method and vehicle for the power battery proposed in the application adjust the target temperature of the current heating and the starting temperature of the next heating to adjust the wake-up period of the battery holding function, intelligently adjust the wake-up period from passive wake-up to variable period wake-up, solve the problem of battery performance degradation in high and low temperature environments with less energy consumption, solve the problem that the battery holding function of a general electric vehicle can only be started after charging is completed, and can only estimate the time for the power battery to drop to the limited temperature according to the current battery pack temperature and the environmental temperature, wake up the whole vehicle to heat the whole battery pack at the estimated start time, improve the battery thermal management efficiency, and reduce the power consumption required for battery holding.

[0079] The thermal management strategy, method and vehicle for the power battery proposed in the application achieve dynamic adjustment of the start and end time of the battery holding function, improve the variable period heating from the original fixed period heating, and the heating period is in the trough stage as much as possible and before the reservation of the vehicle, so as to achieve the purpose of optimal performance with less energy consumption. The application defines the general heating start and end temperature as T1-T2, and the battery can maintain better performance in this interval. The application defines the limit heating start and end temperature as T3-T4, and the battery will not be irreversibly damaged in this interval. It can be known that T3

[0080] Example 1, if the battery temperature is high when the reservation charging function is turned on in the case of setting the reservation charging at time tq, the battery may need to be cooled down at this time, causing energy waste, so energy saving can be achieved by adjusting the battery temperature at the start of the reservation charging. When tq is between t1 and t2, the current is the last battery temperature determination before the reservation charging function is turned on, the time length tq1 = tq - t1 from the start of the reservation charging, the heating stop temperature Te = Tq, and the time length tq2 for cooling Tq to T3 is adjusted to satisfy tq2 = tq1. In particular, this time the battery can still meet the condition that the battery temperature is greater than T3 at time tq, and the heating can be skipped.

[0081] Example 2, in the case of setting the reservation vehicle, the battery temperature can be turned on at the same time as the reservation vehicle air conditioning heating function, and the battery temperature is greater than T1 before the vehicle to meet the better performance of the battery. The air conditioning heating of the reservation vehicle starts at time tp, if tp is between t1 and t2, the current is the last battery temperature heating before the air conditioning heating of the reservation vehicle, the time length tp1 = tp - t1 from the start of the reservation vehicle heating, the heating stop temperature Te = Tp, and the time length tp2 for cooling Tp to T3 is adjusted to satisfy tp2 = tp1. In particular, if the battery temperature cannot be raised from T3 to T1 above when the reservation vehicle heating function is turned on to the reservation vehicle time, the minimum battery temperature at the time of turning on the reservation vehicle heating function is defined as T5, that is, T5 ≥ T3, and the time length tp3 for cooling Tp to T5 is adjusted to satisfy tp3 = tp1.

[0082] Example 3, in the case of setting the peak valley time period, the energy used for the last heating before the trough can be reduced to achieve reasonable reduction of electricity charges. The trough starts at time tm, if tm is between t1 and t2, the current is the last heating before the trough, the time length tm1 = tm - t1 from the start of the trough, the heating stop temperature Te = Tm, and the time length tm2 for cooling Tm to T3 is adjusted to satisfy tm2 = tm1. In particular, the time length tm3 for the battery to continue to cool to T3 at this time, if tm3 >= tm1, the heating can be skipped.

[0083] In Example 4, in the case where the peak-valley time period has been set, the rationality of reducing electricity charges can also be achieved by increasing the last heating before the trough end. The trough end time is tn, if tn is between t1 and t2, then this is the last heating before the trough end, and the time length from the trough end is tn1 = tn-t1. The next heating starting temperature Ts = Tn, the time length of this heating to T2 is tn2, the time length of T2 cooling to Tn is tn3, and the time length of Tn heating to T4 is tn4, which is adjusted to satisfy tn1 = tn2+tn3+tn4. In particular, the time length of the battery directly heating to T4 at t1 is tn5, if tn5 >= tn1, then continue heating to the trough end.

[0084] Figure 2 is a schematic diagram of an optional thermal management process of a vehicle power battery according to an embodiment of the present application, as Figure 2 shown, in response to the vehicle being connected to the charging pile, the environmental temperature of the environment in which the vehicle is located and the battery temperature of the power battery of the vehicle are obtained. In response to receiving the preset charging start time of the vehicle, a first distance time length between the current time and the preset charging start time is determined; based on the environmental temperature and the first distance time length, a holding end temperature is determined; based on the battery temperature, the current time and the holding end temperature, a holding start time and a holding end time are determined. In response to receiving the preset vehicle use time of the vehicle, a second distance time length between the current time and the preset vehicle use time is determined; based on the environmental temperature and the second distance time length, a holding end temperature is determined; based on the battery temperature, the current time and the holding end temperature, a holding start time and a holding end time are determined. In response to receiving the power load characteristic data, in the case where the power load characteristic data includes a power trough start time, a third distance time length between the current time and the power trough start time is determined; based on the environmental temperature and the third distance time length, a holding end temperature is determined; based on the battery temperature, the current time and the holding end temperature, a holding start time and a holding end time are determined; in the case where the power load characteristic data includes a power trough end time, a fourth distance time length between the current time and the power trough end time is determined; based on the environmental temperature and the fourth distance time length, a next holding start temperature is determined; based on the battery temperature, the current time and the next holding start temperature, a holding start time and a holding end time are determined. Based on the holding start time and the holding end time, the power battery is subjected to battery holding.

[0085] The control system includes a central gateway, a battery management system, a vehicle control unit, an on-board charger, a remote intelligent terminal, an air conditioner controller and the like, and should also include high-voltage heater thermistors, fans, water pumps, air conditioner compressors and the like to realize the cooling circuit hardware of the battery thermal management function. The central gateway is used to realize signal routing and realize the signal transmission of the controllers in the controller local area network in different routes; the battery management system is used to monitor the battery core temperature and receive the battery insulation instruction, and if the battery insulation function opening condition is met, the battery insulation request is sent to the vehicle control unit, after the permission is requested, the vehicle control unit interacts with the charger to request the output power of the charger, and the battery insulation function is started. After the battery temperature reaches the set temperature, the request is stopped and the function is exited. The vehicle control unit is responsible for determining the start and exit conditions and executing the start and exit process, receiving the battery insulation request, judging the high-voltage system state, completing the high-voltage power-on, controlling the electric water pump speed according to the battery core temperature, the battery inlet temperature and the battery working state reported by the battery management system, and sending the high-pressure water heating heater heating power to the air conditioner controller; the on-board charger is used to interact with the battery management system and the vehicle control unit, and sends the electronic lock state and the available power state, and the function is started after the output power is output through the charging gun; the air conditioner controller is used to receive the request of the vehicle control unit and respond to the battery heating or battery cooling demand of the vehicle control unit to control the thermistor or compressor work; the remote intelligent terminal wakes up the vehicle after reaching the time, and if the battery temperature reaches the temperature that needs to start insulation, the next heating judgment process is entered.

[0086] Figure 3 is a schematic diagram of an optional vehicle thermal management hardware device connection according to an embodiment of the application, as shown in Figure 3 The central gateway is connected with the remote intelligent terminal, the vehicle control unit, the battery management system, the on-board charger integrated DC converter and the air conditioner controller. The vehicle control unit is also connected with the electric water pump and the fan; the air conditioner controller is also connected with the thermistor and the compressor.

[0087] Figure 4 is a schematic diagram of an optional battery heating or cooling insulation for a power battery according to an embodiment of the application, as shown in Figure 4As shown, the battery management system initiates a battery temperature maintenance request, the vehicle control unit determines that the vehicle meets the high-voltage power-on condition, and starts battery heating or cooling to realize high-voltage power-on; after power-on is completed, the vehicle control unit enables the DC-DC converter. The vehicle control unit performs a thermistor available power upper limit value calculation or a compressor available power upper limit value calculation. In the case of battery heating and temperature maintenance for the power battery, based on the temperature maintenance start time and the temperature maintenance end time, the vehicle water heating thermistor controls the power battery for battery heating and temperature maintenance. In the case of battery cooling and temperature maintenance for the power battery, based on the temperature maintenance start time and the temperature maintenance end time, the vehicle air conditioner compressor controls the power battery for battery cooling and temperature maintenance.

[0088] The power battery thermal management strategy, method and vehicle provided in the application realize dynamic adjustment of the start and end times of the battery temperature maintenance function by actively adjusting the heating start temperature Ts and the heating end temperature Te, and improve the original fixed-period heating to variable-period heating. The battery temperature maintenance function is started in combination with user demand, the battery heating time period is as long as possible in the trough stage and before the scheduled vehicle use, and the optimal performance is realized with small energy consumption, so that the power consumption cost required for battery temperature maintenance can be greatly reduced. Preferably, automatic judgment can be made in combination with the peak and trough power consumption time of each city. The application can be activated in the connection state of the alternating current charging pile, and is not only for the working condition after alternating current charging is completed, but also can intelligently complete battery temperature maintenance when the gun is plugged in but charging has not started.

[0089] According to another aspect of the embodiment of the application, a vehicle power battery thermal management device is also provided, which can execute the vehicle power battery thermal management method of the above-mentioned embodiment, and the specific implementation method and preferred application scenario are the same as those of the above-mentioned embodiment, and will not be repeated here.

[0090] Figure 5 is a schematic diagram of a vehicle power battery thermal management device according to an embodiment of the application, as Figure 5 shown, the device comprises the following: an acquisition module 502, a determination module 504 and a temperature maintenance module 506.

[0091] The acquisition module 502 is configured to acquire the ambient temperature of the environment in which the vehicle is located and the battery temperature of the power battery of the vehicle in response to the connection of the vehicle and the charging pile. The determination module 504 is configured to determine the temperature maintenance start time and the temperature maintenance end time based on the ambient temperature and the battery temperature. The temperature maintenance module 506 is configured to perform battery temperature maintenance on the power battery based on the temperature maintenance start time and the temperature maintenance end time.

[0092] The determining module is further configured to, in response to receiving the preset charging start time of the vehicle, determine a first time interval between the current time and the preset charging start time; determine the temperature at which the battery needs to be kept at the end of the keeping based on the ambient temperature and the first time interval; and determine the keeping start time and the keeping end time based on the battery temperature, the current time and the temperature at which the battery needs to be kept at the end of the keeping.

[0093] The determining module is further configured to, in response to receiving the preset use time of the vehicle, determine a second time interval between the current time and the preset use time; determine the temperature at which the battery needs to be kept at the end of the keeping based on the ambient temperature and the second time interval; and determine the keeping start time and the keeping end time based on the battery temperature, the current time and the temperature at which the battery needs to be kept at the end of the keeping.

[0094] The determining module is further configured to, in response to receiving the power load feature data, in a case where the power load feature data comprises a power valley start time, determine a third time interval between the current time and the power valley start time, wherein the power load feature data is used to represent peak and valley features of power load in a region where the charging pile is located; determine the temperature at which the battery needs to be kept at the end of the keeping based on the ambient temperature and the third time interval; and determine the keeping start time and the keeping end time based on the battery temperature, the current time and the temperature at which the battery needs to be kept at the end of the keeping.

[0095] The determining module is further configured to, in a case where the power load feature data comprises a power valley end time, determine a fourth time interval between the current time and the power valley end time; determine a next keeping start temperature of the battery based on the ambient temperature and the fourth time interval, wherein the next keeping start temperature of the battery is used to represent a battery temperature of the battery when the battery keeping is started next time; and determine the keeping start time and the keeping end time based on the battery temperature, the current time and the next keeping start temperature of the battery.

[0096] The determining module is further configured to determine the temperature at which the battery needs to be kept at the end of the keeping based on the ambient temperature, the battery temperature and the next keeping start temperature of the battery; and determine the keeping start time and the keeping end time based on the battery temperature, the current time and the temperature at which the battery needs to be kept at the end of the keeping.

[0097] The keeping module is further configured to, in a case where the battery keeping instruction is to perform battery heating keeping on the battery, control a water heating thermistor of the vehicle to perform battery heating keeping on the battery based on the keeping start time and the keeping end time; and in a case where the battery keeping instruction is to perform battery cooling keeping on the battery, control a compressor of an air conditioner of the vehicle to perform battery cooling keeping on the battery based on the keeping start time and the keeping end time.

[0098] The embodiment of the present application further provides an electronic device, comprising a memory storing an executable program; and a processor configured to execute the program, wherein the program is configured to execute the method in the various embodiments of the present application when executed.

[0099] The memory can be a device for storing data and programs inside a computer, and can include a memory, a hard disk, etc., wherein the memory can be used for temporarily storing programs and data being executed, the hard disk can be used for long-term storage of programs and data, the memory can be used for enabling the computer to read and write data and execute programs; and the processor can be responsible for executing instructions in the computer program and processing data, and can be responsible for controlling and executing various operations, including arithmetic operations, logical operations, data transmission, etc.

[0100] The embodiment of the present application further provides a computer readable storage medium, comprising a stored executable program, wherein the executable program is configured to control a device where the computer readable storage medium is located to execute the method in the various embodiments of the present application when executed.

[0101] The computer storage medium can be a medium for storing certain discontinuous physical quantities in a computer memory, and the computer storage medium mainly includes semiconductors, magnetic cores, magnetic drums, magnetic tapes, laser discs, etc.; the stored program included in the computer readable storage medium can be a set of instructions that can be recognized and executed by a computer, and can be an information tool that meets certain needs of people when running on an electronic computer.

[0102] The embodiment of the present application further provides a computer program product, comprising a computer program, wherein the computer program is configured to implement the method in the various embodiments of the present application when executed by a processor.

[0103] The computer program product can be a software program that has been written, tested and released, and can run on a computer or other device; the computer program product can include application programs, operating systems, tool software, etc., and is used for implementing specific functions or solving specific problems.

[0104] The embodiment of the present application further provides a computer program product, comprising a non-volatile computer readable storage medium, wherein the non-volatile computer readable storage medium is used for storing a computer program, and the computer program is configured to implement the method in the various embodiments of the present application when executed by a processor.

[0105] The non-volatile computer readable storage medium can be a medium for storing data, and the non-volatile computer readable storage medium can keep the data from being lost when power is off, and can be used for storing long-term saved data such as operating systems, application programs and user files; the non-volatile storage medium can include a hard disk drive, a solid state disk, an optical disc and a flash memory storage device, etc.

[0106] Embodiments of the present application also provide a computer program which, when executed by a processor, implements the method of any of the above embodiments of the present application.

[0107] The above computer program can refer to a set of instructions for telling a computer to perform a specific task or operation. The computer program can be written by a programmer using a specific programming language and can include algorithms, data structures, logic and control flow, etc. The computer program can be used for various purposes, including application software, operating systems, etc.

[0108] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0109] In several embodiments provided in the present application, it should be understood that the disclosed technical contents can be implemented by other means. For example, the above-described device embodiments are illustrative, for example, the division of the units can be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or modules shown or discussed can be indirect coupling or communication connection through some interfaces, and can be electrical or other forms.

[0110] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place or distributed on multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0111] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0112] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in other words, the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0113] The above is the preferred embodiment of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A thermal management method for a vehicle power battery, characterized in that, include: In response to the vehicle connecting to the charging station, the ambient temperature of the vehicle's environment and the battery temperature of the vehicle's power battery are obtained. Based on the ambient temperature and the battery temperature, determine the start and end times of heat preservation. Based on the start and end times of the heat preservation, the power battery is kept warm.

2. The thermal management method for a vehicle power battery according to claim 1, characterized in that, Based on the ambient temperature and the battery temperature, the timing for starting and ending the heat preservation process is determined, including: In response to receiving a preset charging start time of the vehicle, a first time interval between the current time and the preset charging start time is determined; Based on the ambient temperature and the first time interval, the end temperature of heat preservation is determined, wherein the end temperature of heat preservation is used to represent the temperature that the power battery needs to reach at the end of the heat preservation. Based on the battery temperature, the current time, and the end temperature of the heat preservation, the start time and end time of the heat preservation are determined.

3. The thermal management method for a vehicle power battery according to claim 1, characterized in that, Based on the ambient temperature and the battery temperature, the timing for starting and ending the heat preservation process is determined, including: In response to receiving the preset vehicle usage time, a second time interval between the current time and the preset vehicle usage time is determined; Based on the ambient temperature and the second phase interval duration, the end temperature of the heat preservation is determined; Based on the battery temperature, the current time, and the end temperature of the heat preservation, the start time and end time of the heat preservation are determined.

4. The thermal management method for a vehicle power battery according to claim 1, characterized in that, Based on the ambient temperature and the battery temperature, the timing for starting and ending the heat preservation process is determined, including: In response to receiving power load characteristic data, if the power load characteristic data includes the start time of the power trough, a third phase distance duration between the current time and the start time of the power trough is determined, wherein the power load characteristic data is used to characterize the peak and trough characteristics of the power load in the area where the charging pile is located; The end temperature of heat preservation is determined based on the ambient temperature and the duration of the third phase interval. Based on the battery temperature, the current time, and the end temperature of the heat preservation, the start time and end time of the heat preservation are determined.

5. The thermal management method for a vehicle power battery according to claim 4, characterized in that, The method further includes: If the power load characteristic data includes the end time of the power trough, determine the fourth phase distance duration between the current time and the end time of the power trough; Based on the ambient temperature and the fourth phase interval duration, the next heat preservation start temperature is determined, wherein the next heat preservation start temperature is used to indicate the battery temperature of the power battery when the battery heat preservation is activated next time. Based on the battery temperature, the current time, and the next temperature at which heat preservation will begin, the start time and end time of heat preservation are determined.

6. The thermal management method for a vehicle power battery according to claim 5, characterized in that, Determining the start and end times of heat preservation based on the battery temperature, the current time, and the next heat preservation start temperature includes: Based on the ambient temperature, the battery temperature, and the next insulation start temperature, determine the insulation end temperature; Based on the battery temperature, the current time, and the end temperature of the heat preservation, the start time and end time of the heat preservation are determined.

7. The thermal management method for a vehicle power battery according to any one of claims 1 to 6, characterized in that, Based on the start and end times of the heat preservation operation, the power battery is subjected to battery heat preservation, including: When the battery insulation command is to heat and insulate the power battery, the vehicle water heating thermistor is controlled to heat and insulate the power battery based on the insulation start time and the insulation end time. When the battery insulation command is to cool and insulate the power battery, the vehicle air conditioning compressor is controlled to cool and insulate the power battery based on the insulation start time and the insulation end time.

8. A thermal management device for a vehicle power battery, characterized in that, include: The acquisition module is used to acquire the ambient temperature of the environment in which the vehicle is located and the battery temperature of the vehicle's power battery in response to the connection between the vehicle and the charging pile. The determination module is used to determine the start time and end time of heat preservation based on the ambient temperature and the battery temperature. The heat preservation module is used to keep the power battery warm based on the heat preservation start time and the heat preservation end time.

9. An electronic device, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program executes the thermal management method for a vehicle power battery according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device on which the storage medium is located to perform the thermal management method for a vehicle power battery according to any one of claims 1 to 7.

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