Temperature control method and device of power battery, computer equipment and storage medium

Abstract

The invention provides a temperature control method and device of a power battery, computer equipment and a storage medium. The method comprises the following steps: estimating heat generated by a power battery in a planned travel to obtain an estimated heating value of the battery; determining cooling required power required by the power battery in the planned travel based on the battery estimated calorific value; and performing temperature control on the power battery in the planned travel according to the cooling required power. Thus, in the planned travel of the vehicle, the temperature of the power battery can be reasonably and timely controlled, and therefore the situation that the electric quantity of the power battery is excessively used for temperature control can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a temperature control method, device, computer device and storage medium for a power battery. Background Art

[0002] With the development of new energy technologies, various types of new energy vehicles such as electric vehicles and hybrid vehicles have emerged. During the driving process of new energy vehicles, it is necessary to perform thermal management on the power battery to keep the power battery within a suitable temperature range.

[0003] In related technologies, when the temperature of the power battery is too high during the driving process of a new energy vehicle, the temperature of the power battery is usually controlled by a battery cooling system to keep it within a suitable temperature range. However, during the vehicle driving process, too much power of the power battery is used for the battery cooling system to control the temperature of the power battery, which easily leads to a reduction in the cruising range of the new energy vehicle.

[0004] Therefore, there is an urgent need to provide a temperature control method for a power battery to improve the cruising range of the vehicle. Summary of the Invention

[0005] In view of this, the present application is committed to providing a temperature control method, device, computer device and storage medium for a power battery to improve the cruising range of the vehicle.

[0006] The present application provides a temperature control method for a power battery, the method comprising: estimating the heat generated by the power battery during a planned journey to obtain an estimated battery heat generation; determining a cooling demand power required by the power battery during the planned journey based on the estimated battery heat generation; and controlling the temperature of the power battery during the planned journey according to the cooling demand power.

[0007] In the above implementation, by estimating the heat generated by the power battery during the planned journey, determining the cooling demand power required by the power battery during the planned journey based on the obtained estimated battery heat generation, and controlling the temperature of the power battery during the planned journey according to the cooling demand power, in this way, during the planned journey of the vehicle, the temperature of the power battery can be controlled reasonably and in a timely manner, thereby reducing the charge and discharge times of the power battery during the planned journey, and reducing the excessive use of the power of the power battery for cooling the temperature of the power battery.

[0008] In some embodiments, before determining the cooling demand power required by the power battery during the planned trip based on the estimated heat generation of the battery, the method further includes: determining the heat storage amount and heat loss amount of the power battery during the planned trip. In this embodiment, determining the cooling demand power required by the power battery during the planned trip based on the estimated heat generation of the battery includes: estimating the cooling amount according to the estimated heat generation of the battery, the heat storage amount, and the heat loss amount, and determining the cooling demand amount required by the power battery during the planned trip; determining the cooling demand power according to the cooling demand amount and the estimated travel time of the planned trip.

[0009] In the above embodiments, on the one hand, by determining the heat storage amount and heat loss amount of the power battery during the planned trip, and estimating the cooling demand amount required by the power battery during the planned trip according to the estimated heat generation of the battery, the heat storage amount, and the heat loss amount, when estimating the heat generated by the power battery during the planned trip, the estimated heat generation of the battery is more accurate and closer to the actual situation, and thus the determined cooling demand amount is less and closer to the actual situation; on the other hand, the cooling demand power during the planned trip determined according to the estimated travel time of the planned trip and the more realistic and less cooling demand amount can further reduce the excessive use of the power of the power battery for cooling the temperature of the power battery.

[0010] In some embodiments, determining the heat storage amount of the power battery during the planned trip includes: determining the heat storage amount of the power battery during the planned trip according to the upper working temperature and the initial temperature of the power battery; the initial temperature is the temperature of the power battery at the departure time of the planned trip.

[0011] In the above embodiments, by determining the heat storage amount of the power battery during the planned trip according to the upper working temperature of the power battery and the temperature of the power battery at the departure time during the planned trip, the determined cooling demand amount based on the heat storage amount can be less and closer to the actual situation, and can further reduce the excessive use of the power of the power battery for cooling the temperature of the power battery.

[0012] In some embodiments, the power battery is equipped with a battery cooling system, and the battery cooling system has a lower cooling power limit; controlling the temperature of the power battery during the planned trip according to the cooling demand power includes: when the cooling demand power is less than the lower cooling power limit, the battery cooling system is not started.

[0013] In the above embodiments, when the cooling demand power during the planned trip is less than the lower cooling power limit, it is not necessary to start the battery cooling system to control the temperature of the power battery during the planned trip. Thus, the use of the battery cooling system can be reduced to a certain extent, and further, the charge and discharge times of the power battery can be reduced.

[0014] In some embodiments, the power battery is configured with a battery cooling system, and the battery cooling system has a lower cooling power limit and an upper cooling power limit; controlling the temperature of the power battery during the planned trip according to the cooling demand power includes: when the cooling demand power is not less than the lower cooling power limit and less than the upper cooling power limit, determining the starting time of the battery cooling system during the planned trip; starting the battery cooling system at the starting time so that the temperature of the power battery at the end of the planned trip does not exceed the upper working temperature of the power battery.

[0015] In the above embodiments, when determining the cooling demand power during the planned trip and when the cooling demand power is not less than the lower cooling power limit and does not exceed the upper cooling power limit, by determining the starting time of the battery cooling system during the planned trip and starting the battery cooling system at the starting time, it can be ensured that the temperature of the power battery does not exceed the upper working temperature of the power battery at or before the end of the planned trip. In this way, on the premise that the temperature of the power battery during the planned trip does not exceed the upper working temperature, the activation duration of the cooling system can be reduced, and further, the power of the power battery used for cooling the temperature of the power battery can be reduced.

[0016] In some embodiments, the power battery is configured with a battery cooling system, and the battery cooling system has an upper cooling power limit; controlling the temperature of the power battery during the planned trip according to the cooling demand power includes: when the cooling demand power is greater than the upper cooling power limit, determining the required battery pre-cooling amount of the power battery; pre-starting the battery cooling system according to the battery pre-cooling amount so that the actual cooling power of the battery cooling system does not exceed the upper cooling power limit, and the temperature of the power battery at the end of the planned trip does not exceed the upper working temperature of the power battery.

[0017] In the above embodiments, when the cooling demand power is greater than the cooling upper limit power, the required battery pre-cooling amount of the power battery is determined, and the battery cooling system is pre-activated according to the battery pre-cooling amount, so that the actual cooling power of the battery cooling system does not exceed the cooling upper limit power, and the temperature of the power battery at the end of the planned journey does not exceed the working upper limit temperature of the power battery. In this way, when the estimated heat generation of the power battery in the planned journey is too large, the power battery can be pre-cooled to reduce the probability of thermal runaway of the power battery in the planned journey.

[0018] In some embodiments, the battery cooling system is configured with an operating parameter determination table, and the battery cooling system can determine the target operating parameters of the battery cooling system in the working state according to the real-time temperature data of the power battery and the operating parameter determination table; the method further includes: sending the battery health state data of the power battery to the server, so that the server can correct the operating parameter determination table of the battery cooling system according to the battery health state data to obtain an operating parameter correction table; receiving the operating parameter correction table fed back by the server, and using the operating parameter correction table as the operating parameter determination table.

[0019] In the above embodiments, by sending the battery health state data to the server and receiving the operating parameter correction table fed back by the server, and using the operating parameter correction table as the operating parameter determination table for operating the battery cooling system. In this way, based on the battery temperature range of the power battery that does not exceed the working upper limit temperature during the planned journey, on the one hand, when the battery cooling system operates based on the corrected operating parameter determination table, it can have a relatively high and relatively constant battery cooling power, thereby improving the energy efficiency ratio of the battery cooling system, reducing the adjustment frequency of the battery cooling system, and further reducing the charge and discharge times of the power battery during the planned journey and reducing the amount of power of the power battery used for cooling the temperature of the power battery; on the other hand, when the power battery is aged or fails, the battery cooling system can adjust the operating parameter determination table in a timely manner based on the aging or failure state of the power battery, thereby reducing the probability of thermal runaway of the power battery.

[0020] In some embodiments, estimating the heat generated by the power battery during the planned journey to obtain the estimated battery heat generation includes: estimating the heat generated by the power battery during the planned journey according to the planned journey related data to obtain the estimated battery heat generation; wherein, the planned journey related data includes at least one of the journey mileage, the journey road condition information, and the vehicle electrical power consumption.

[0021] In the above embodiments, by predicting the estimated heat generation of the power battery during the planned trip based on at least one of the driving mileage, driving road conditions information, and vehicle electrical power consumption, the prediction of the estimated heat generation of the battery during the planned trip can be made more in line with the actual situation, improving the accuracy of the prediction of the estimated heat generation of the battery during the planned trip.

[0022] The present application provides a temperature control device for a power battery, the device includes: a heat generation prediction module, configured to predict the heat generated by the power battery during a planned trip to obtain an estimated battery heat generation; a required power determination module, configured to determine the required cooling power of the power battery during the planned trip based on the estimated battery heat generation; and a temperature control module, configured to control the temperature of the power battery during the planned trip according to the cooling power requirement.

[0023] The present application provides a computer device, including a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, it implements the temperature control method described in any of the above embodiments.

[0024] The present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the temperature control method described in any of the above embodiments.

[0025] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. Brief Description of the Drawings

[0026] By reading the detailed description of the optional embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the optional embodiments and are not considered to be a limitation of the present invention. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0027] Figure 1a is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0028] Figure 1b is a schematic application environment diagram of the temperature control method of the power battery provided by an embodiment of the present application;

[0029] Figure 2 is a schematic flowchart of the temperature control method of the power battery provided by an embodiment of the present application;

[0030] Figure 3Flow chart of the method for determining the cooling required power provided for the embodiments of the present application;

[0031] Figure 4 Flow chart of the method for controlling the temperature of the power battery provided for the embodiments of the present application;

[0032] Figure 5 Flow chart of the method for controlling the temperature of the power battery provided for the embodiments of the present application;

[0033] Figure 6 Flow chart of the method for controlling the temperature of the power battery provided for the embodiments of the present application;

[0034] Figure 7 Flow chart of the method for controlling the temperature of the power battery provided for the embodiments of the present application;

[0035] Figure 8 Schematic diagram of the device for controlling the temperature of the power battery provided for the embodiments of the present application;

[0036] Figure 9 Schematic diagram of the computer device provided for the embodiments of the present application. Detailed implementation manners

[0037] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the embodiments of this application, the claims and the above description of the accompanying drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0040] References to "embodiments" in this specification mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0042] Temperature has a great influence on the performance of power batteries in new energy vehicles such as electric vehicles and hybrid vehicles. During the driving process of new energy vehicles, it is necessary to perform thermal management on the power battery, or rather, to control the temperature of the power battery so that the power battery is within a suitable temperature range.

[0043] In some related technologies, the output power of the power battery during the driving process of new energy vehicles changes with the vehicle operating state. For example, the change in the output power of the motor caused by acceleration and deceleration, environmental changes such as entering and exiting tunnels, and the change in the power of other vehicle electrical appliances caused by the adjustment of the in-vehicle air conditioner power. These changes in the vehicle operating state usually cause the output power of the power battery to change, and thus the real-time heat generation of the power battery also changes continuously.

[0044] In some other related technologies, the temperature of the power battery can usually be controlled by a battery cooling system. When the temperature of the power battery is too high, the power battery is cooled to reduce its temperature. Correspondingly, when the temperature of the power battery is too low, the temperature is increased so that the power battery operates at a suitable temperature. However, in related technologies, during the vehicle driving process, the power of the power battery is easily used excessively for temperature control by the battery cooling system, which easily leads to a reduction in the driving range of new energy vehicles.

[0045] In still some other related technologies, the opening degree of the electronic expansion valve and the rotational speed of the compressor in the battery cooling system can be dynamically adjusted based on the temperature change of the power battery. This makes it often impossible for the electronic expansion valve or the compressor in the battery cooling system to work in the efficient range in real time, easily resulting in a low energy efficiency ratio of the battery cooling system, and a high adjustment frequency of the electronic expansion valve or the compressor; in addition, it also places high requirements on the durability of the electronic expansion valve and the compressor in the battery cooling system.

[0046] Therefore, it is necessary to provide a temperature control method for a power battery. By determining the planned itinerary of the vehicle and estimating the heat generated by the power battery during the planned itinerary to obtain the estimated heat generation of the battery, then, based on the estimated heat generation of the battery, determining the cooling demand power required by the power battery during the planned itinerary, and finally, according to the cooling demand power, controlling the temperature of the power battery during the planned itinerary. In this way, the power consumption of the power battery for temperature control can be reduced, and thus the cruising range of new energy vehicles can be improved.

[0047] The power battery in the embodiments of the present application can be used in electrical devices using the power battery as a power source or various energy storage systems using the power battery as an energy storage element. The electrical device can be, but is not limited to, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc. For the convenience of description, the scenario example of the embodiments of the present application is described by taking an electrical device as vehicle 1000 as an example.

[0048] Please refer to Figure 1a , Figure 1a which is a schematic structural diagram of vehicle 1000 provided for this scenario example. Vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. Inside vehicle 1000, there is a power battery 100. The power battery 100 can be arranged at the bottom, head, or tail of vehicle 1000. The power battery 100 can be used for the power supply of vehicle 1000. For example, the power battery 100 can be used as the operating power source of vehicle 1000. Vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the power battery 100 to supply power to the motor 300. For example, it is used for the working power demand during the start, navigation, and driving of vehicle 1000. In this scenario example, the power battery 100 can not only be used as the operating power source of vehicle 1000, but also be used as the driving power source of vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1000.

[0049] Please refer to Figure 1b , Figure 1b which is a schematic diagram of the application environment of the temperature control method for the power battery provided in this scenario example. The power battery in vehicle 1000 can be configured with a battery cooling system. This temperature control method is applied to Figure 1bin the battery cooling system of the vehicle 1000, or applied to an in-vehicle terminal having a function of controlling the vehicle. It can be understood that the battery cooling system and the in-vehicle terminal can communicate with the server 120 and the mobile terminal 130.

[0050] Exemplarily, the battery cooling system can be configured with an operating parameter determination table, and the battery cooling system can operate based on the operating parameter determination table. Among them, the operating parameter determination table can be pre-calibrated. Exemplarily, during operation, the battery cooling system can query the operating parameter determination table and operate according to the obtained target operating parameters.

[0051] Exemplarily, the battery cooling system can include a compressor and at least one electronic expansion valve. As an example, the electronic expansion valve can be configured in an evaporator, a plate heat exchanger or a condenser. As an example, both the compressor and the electronic expansion valve can be configured with corresponding operating parameter determination tables, so that during operation, the compressor and the electronic expansion valve can query their respective operating parameter determination tables and obtain their respective target operating parameters for operation.

[0052] An embodiment of the present application provides a method for controlling the temperature of a power battery. Please refer to Figure 2 , Figure 2 is a flowchart of a method for controlling the temperature of a power battery provided in this embodiment. This embodiment provides method operation steps as shown in the flowchart, but based on routine or non-creative labor, it can include more or fewer operation steps. The step order listed in the embodiment is only one execution method among the execution orders of numerous steps, and does not represent the only execution order. When the actual system or server product executes, it can be executed in the method order shown in the embodiment or in parallel (for example, in an environment of parallel processors or multi-threaded processing). This temperature control method can be applied to the battery cooling system or the in-vehicle terminal in the battery cooling system, specifically as Figure 2 shown, this temperature control method can include the following steps.

[0053] Step S210: Estimate the heat generated by the power battery during the planned journey to obtain the estimated battery heat generation.

[0054] Among them, the planned journey can refer to a driving route with a destination. Exemplarily, the planned journey can be determined based on planned journey-related data, and the planned journey-related data can include the journey mileage. Among them, the journey mileage can refer to the total distance or total length of the driving route.

[0055] Exemplarily, the planned trip related data may also include driving time and estimated travel time. Among them, the estimated travel time may refer to the estimated driving duration of the planned trip or the driving route of the planned trip, that is, the duration between the departure time and the end time of the planned trip. As an example, the driving time may represent the specific time of the departure time of the planned trip in a day or a natural day, or may represent any time between the departure time and the end time, the specific time in a day or a natural day. As another example, the driving time may also represent the time period between the departure time and the end time of the planned trip, the specific time period in a day or a natural day. As an example, the driving time may also represent the specific season or month of the planned trip in a year, and the specific natural day in the specific season or month.

[0056] Exemplarily, the estimated battery heat generation can be estimated based on the driving time of the vehicle in the morning, noon, afternoon or night of a day, in combination with the estimated travel time and the driving route. Exemplarily, the estimated battery heat generation can also be estimated based on the driving time of the vehicle on a certain day in spring, summer, autumn or winter, in combination with the estimated travel time and the driving route.

[0057] Exemplarily, the planned trip can be obtained from a mobile terminal or a server.

[0058] Step S220: Determine the cooling demand power required by the power battery during the planned trip based on the estimated battery heat generation.

[0059] Among them, the cooling demand power required during the planned trip may refer to the average power required to cool the power battery during the planned trip, or rather, the cooling demand power may refer to the average power required to cool the power battery during the entire estimated travel time of the planned trip.

[0060] Step S230: Control the temperature of the power battery during the planned trip according to the cooling demand power.

[0061] Specifically, after determining the cooling demand power required by the power battery during the planned trip, when controlling the temperature of the power battery according to the cooling demand power, it may be to control the temperature of the power battery during the entire estimated travel time of the planned trip, or to control the temperature of the power battery during some time periods within the estimated travel time. Exemplarily, the temperature control of the power battery can be started at any time between the departure time and the end time of the planned trip until the end time of the planned trip.

[0062] In the above embodiments, by predicting the heat generated by the power battery during the planned journey, determining the cooling demand power required by the power battery during the planned journey based on the predicted battery heat generation, and controlling the temperature of the power battery during the planned journey according to the cooling demand power. In this way, during the planned journey of the vehicle, the temperature of the power battery can be reasonably and timely controlled, reducing the excessive use of the power of the power battery for cooling the temperature of the power battery, thereby improving the cruising range of the power battery during the planned journey. At the same time, the service life of the power battery can be extended.

[0063] In some embodiments, before determining the cooling demand power required by the power battery during the planned journey based on the predicted battery heat generation, the temperature control method of the power battery may further include: determining the heat storage amount and heat loss amount of the power battery during the planned journey.

[0064] In some cases, the power battery can be used as a heat storage device, which can store at least part of the heat generation as thermal energy for secondary utilization of the stored thermal energy to improve the energy utilization rate.

[0065] Among them, the heat storage amount can be the heat that the power battery can store during the planned journey. The heat loss amount can be the heat exchange amount between the power battery and the surrounding environment during the planned journey without actively controlling the temperature of the power battery. Exemplarily, the heat loss amount can be through evaporation heat dissipation, convective heat dissipation, radiative heat dissipation, and heat conduction, etc.

[0066] In this embodiment, please refer to Figure 3 , determining the cooling demand power required by the power battery during the planned journey based on the predicted battery heat generation may include the following steps.

[0067] Step S310: Estimate the cooling amount according to the predicted battery heat generation, heat storage amount, and heat loss amount, and determine the cooling demand of the power battery during the planned journey.

[0068] In some cases, when at least part of the heat generation of the power battery during the planned journey can be recovered and stored as thermal energy, the cooling demand of the power battery during the planned journey can be determined based on the predicted heat generation and heat storage amount during the planned journey, combined with the heat loss amount of the power battery during the planned journey, so that the cooling demand power during the planned journey determined based on the cooling demand is more in line with the actual situation and more accurate.

[0069] Specifically, the cooling demand during the planned journey can be determined based on the predicted battery heat generation, heat storage amount, heat loss amount, and correction factor during the planned journey. Exemplarily, the cooling demand can be determined by Formula 1, where Q 冷却represents the cooling demand, δ represents the correction coefficient, and Q 预估 represents the estimated heat generation of the battery, and Q 储热 represents the heat storage capacity, and Q 热损失 represents the heat loss.

[0070] Q 冷却 = δ(Q 预估 - Q 储热 - Q 热损失 ) Formula 1

[0071] As an example, the correction coefficient can be determined according to the actual situation of the power battery and the surrounding environment of the power battery.

[0072] Step S320: Determine the cooling demand power according to the cooling demand and the estimated travel time of the planned itinerary.

[0073] In some cases, the data related to the planned itinerary may also include information on road congestion level and user habit information.

[0074] Specifically, the estimated travel time can be determined based on the road congestion level information and user habit information of the planned itinerary. Among them, the road congestion level information can be used to describe the road congestion level corresponding to the planned itinerary, or to describe the road congestion level during the corresponding driving time of the planned itinerary. The user vehicle usage habit information can be used to describe information such as the preset driving speed and preset driving mode corresponding to the driver user in the planned itinerary.

[0075] Exemplarily, user habit information such as the preset driving speed and preset driving mode can be determined through statistical analysis based on historical user habit information. Exemplarily, the preset driving speed can be determined through statistical analysis of the historical driving speed of the driver user. The preset driving mode can be determined through statistical analysis of the historical driving mode of the driver user. For example, the preset driving mode can be any one of the ECO economy mode, standard mode, or sport mode.

[0076] Exemplarily, the cooling demand power can be determined by Formula 2. Among them, P 冷却 represents the cooling demand power, and t represents the estimated travel time.

[0077]

[0078] In the above embodiments, on the one hand, by determining the heat storage amount and heat loss amount of the power battery during the planned journey, and estimating the cooling demand required by the power battery during the planned journey based on the estimated heat generation amount, heat storage amount, and heat loss amount of the battery, when estimating the heat generated by the power battery during the planned journey, the estimated heat generation amount of the battery is more accurate and closer to the actual situation, thereby making the determined cooling demand less and closer to the actual situation. On the other hand, the cooling demand power during the planned journey determined according to the estimated travel time of the planned journey and the more realistic and less cooling demand makes it possible to further reduce the power of the power battery being excessively used for cooling the temperature of the power battery.

[0079] In some embodiments, determining the heat storage amount of the power battery during the planned journey may include: determining the heat storage amount of the power battery during the planned journey according to the upper working temperature and the initial temperature of the power battery.

[0080] Wherein, the initial temperature is the temperature of the power battery at the departure moment of the planned journey.

[0081] In some cases, the power battery has a corresponding lower working temperature and upper working temperature, and the temperature range between the lower working temperature and the upper working temperature is the suitable temperature range for the power battery to work, or in other words, the temperature range between the lower working temperature and the upper working temperature is the optimal working range of the power battery.

[0082] In some other cases, by taking the temperature of the power battery being kept below the upper working temperature during the planned journey or before the end of the planned journey as the control target, or in other words, by taking the temperature of the power battery being equal to or reaching the upper working temperature at the end of the planned journey as the control target, the power of the power battery being excessively used for cooling the power battery can be reduced, thereby improving the cruising range of the vehicle.

[0083] In this embodiment, the heat storage amount of the power battery during the planned journey can be determined according to the initial temperature and the upper working temperature of the power battery. Wherein, the initial temperature can be any temperature between the lower working temperature and the upper working temperature. Specifically, the heat storage amount of the power battery can be determined according to the initial temperature of the power battery, the upper working temperature, the specific heat capacity of the power battery, and the mass of the power battery.

[0084] Exemplarily, the power battery may include a plurality of battery cells, or in other words, the power battery may include a plurality of battery cores. As an example, the mass of the power battery may be the sum of the masses of the battery cells or battery cores in the power battery. As an example, the initial temperature may refer to the average initial temperature of the battery cells or battery cores in the power battery, the upper operating temperature may refer to the average upper operating temperature of the battery cells or battery cores in the power battery, and the lower operating temperature may refer to the average lower operating temperature of the battery cells or battery cores in the power battery.

[0085] Exemplarily, the heat storage amount of the power battery during the planned journey can be determined by Formula 3. Wherein, Q 储热 represents the heat storage amount of the power battery during the planned journey, C represents the specific heat capacity of the power battery, m represents the mass of the power battery, and T 1 represents the initial temperature, and T 2 represents the upper operating temperature.

[0086] Q 储热max = Cm(T 2 - T 1 ) Formula 3

[0087] In the above embodiments, by determining the heat storage amount of the power battery during the planned journey according to the upper operating temperature of the power battery and the temperature of the power battery at the departure moment during the planned journey, it is possible to make the cooling demand determined based on the heat storage amount less and more in line with the actual situation, and it is possible to further reduce the power of the power battery being excessively used for cooling the temperature of the power battery, thereby improving the cruising range of the vehicle.

[0088] In some embodiments, the battery cooling system may have a lower cooling power and an upper cooling power. The power range between the lower cooling power and the upper cooling power is used as the power range for the operation of the battery cooling system, and this power range includes the optimal power range for the operation of the battery cooling system. Specifically, the battery cooling system may include a compressor and at least one electronic expansion valve.

[0089] Exemplarily, the lower cooling power of the battery cooling system may be 0 or may not be 0.

[0090] Exemplarily, the upper cooling power may be the maximum cooling power of the battery cooling system, that is to say, the upper cooling power may refer to the maximum cooling capacity of the battery cooling system, indicating the cooling capacity when the battery cooling system operates at the maximum power.

[0091] In some embodiments, according to the cooling demand power, controlling the temperature of the power battery during the planned journey may include: when the cooling demand power is less than the lower cooling power, the battery cooling system is not started.

[0092] Exemplarily, the lower limit cooling power can be 0. When the cooling demand power during the planned journey is less than 0, the battery cooling system may not be started. At this time, the cooling demand during the planned journey is 0, and the estimated heat generation of the power battery can be stored as the heat storage of the power battery during the planned journey, or can be used as the heat loss of the power battery during the planned journey.

[0093] Exemplarily, the lower limit cooling power can be non-zero. When the cooling demand power during the planned journey is less than this non-zero lower limit cooling power, the cooling demand during the planned journey is not 0, or rather, the estimated heat generation of the battery is greater than the sum of the heat storage and the heat loss. However, at this time, the estimated heat generation of the power battery during the planned journey will not have a great impact on the power battery. Or rather, when the cooling demand power during the planned journey is less than this non-zero lower limit cooling power, the power battery during the planned journey will not cause thermal runaway due to the estimated heat generation of the power battery. Therefore, the battery cooling system may not be started either. At this time, at least part of the estimated heat generation of the power battery can be stored as the heat storage during the planned journey, or can be used as the heat loss of the power battery during the planned journey.

[0094] In the above embodiments, when the cooling demand power during the planned journey is less than the lower limit cooling power, the battery cooling system is not started to control the temperature of the power battery during the planned journey, thereby reducing the use of the battery cooling system to a certain extent, reducing the excessive use of the power of the power battery for temperature control of the power battery, and improving the cruising range of the vehicle.

[0095] In some embodiments, please refer to Figure 4 , according to the cooling demand power, controlling the temperature of the power battery during the planned journey may include the following steps.

[0096] Step S410: When the cooling demand power is not less than the lower limit cooling power and does not exceed the upper limit cooling power, determine the start time of the battery cooling system during the planned journey.

[0097] In some cases, the temperature control of the power battery during the planned journey can be started at the start time. This start time can be any time between the departure time and the end time during the planned journey, that is, it can be any time within the entire estimated travel time of the planned journey.

[0098] In still other cases, the start time can be determined based on the estimated heat generation, heat storage, heat loss, and estimated travel time of the battery during the planned journey.

[0099] Specifically, the heat loss amount may include a first heat loss amount and a second heat loss amount. The first heat loss amount is the heat loss amount from the departure time to the start time in the estimated travel time, and the second heat loss amount is the heat loss amount from the start time to the end time in the estimated travel time. Among them, the time period from the start time to the end time is the cooling period of the battery cooling system in the planned itinerary.

[0100] Specifically, the second cooling demand can be determined according to the cooling duration corresponding to the cooling period and the selected actual cooling power. Among them, the second cooling demand refers to the cooling demand required by the power battery during the cooling period in the estimated travel time. The second cooling demand can also be determined according to the estimated heat generation amount, heat storage amount, and second heat loss amount of the battery. Exemplarily, the selected actual cooling power can be the cooling upper limit power, or any power between the cooling lower limit power and the cooling upper limit power.

[0101] Therefore, based on the estimated heat generation amount, heat storage amount, selected actual cooling power, and the second heat loss amount in the estimated travel time of the battery, the start time can be determined.

[0102] Step S420: Start the battery cooling system at the start time so that the temperature of the power battery does not exceed the working upper limit temperature of the power battery at the end of the planned itinerary.

[0103] Specifically, the battery cooling system can be started at the start time, and the temperature of the power battery can be controlled with the goal of keeping the temperature of the power battery not exceeding the working upper limit temperature of the power battery during the planned itinerary or before the end of the planned itinerary. Exemplarily, on the premise of not affecting the battery life of the power battery, the power battery can be cooled by setting the control goal that the temperature of the power battery is equal to or reaches the working upper limit temperature at the end of the planned itinerary.

[0104] In the above embodiments, when determining the cooling demand power during the planned itinerary and when the cooling demand power is not less than the cooling lower limit power and does not exceed the cooling upper limit power, by determining the start time of the battery cooling system during the planned itinerary and starting the battery cooling system at the start time, it can be ensured that the temperature of the power battery does not exceed the working upper limit temperature of the power battery at the end of the planned itinerary or before the end time. In this way, on the premise that the temperature of the power battery does not exceed the working upper limit temperature during the planned itinerary, the activation duration of the cooling system can be reduced, thereby reducing the excessive use of the power of the power battery for cooling during the planned itinerary, and further improving the cruising range of the vehicle.

[0105] In some embodiments, please refer to Figure 5 , according to the cooling demand power, controlling the temperature of the power battery during the planned itinerary may include the following steps.

[0106] Step S510: When the cooling demand power is greater than the cooling upper limit power, determine the required battery pre-cooling amount of the power battery.

[0107] In some cases, when the cooling demand power is greater than the cooling upper limit power, it means that the estimated heat generation of the power battery during the planned journey is too large. In other words, when the battery cooling system cools the power battery at an actual cooling power not greater than the cooling upper limit power during the planned journey, for example, when cooling the power battery at the cooling upper limit power, the temperature of the power battery during the planned journey will exceed the working upper limit temperature of the power battery. Therefore, the power battery can be pre-cooled before the planned journey starts.

[0108] In still other cases, the stored heat of the power battery can be determined based on the initial temperature and the working upper limit temperature. Before the planned journey starts, when the temperature of the power battery is too high, the power battery can be pre-cooled to adjust the initial temperature of the power battery to any temperature between the working lower limit temperature and the working upper limit temperature. In this way, the stored heat of the power battery during the planned journey can be increased.

[0109] In still other cases, the required cooling demand during the planned journey can include a first cooling demand. Among them, the first cooling demand can be the cooling amount required to cool the power battery at a selected actual cooling power during the estimated passing time in the planned journey. Exemplarily, the selected actual cooling power can be the cooling upper limit power, or any power between the cooling lower limit power and the cooling upper limit power.

[0110] Specifically, the battery pre-cooling amount is the cooling amount required to pre-cool the power battery before the planned journey starts. Exemplarily, the battery pre-cooling amount can be determined according to the cooling demand required during the planned journey and the first cooling demand.

[0111] As an example. The battery pre-cooling amount can be less than, equal to, or greater than the difference between the cooling demand and the first cooling demand.

[0112] As an example, the battery pre-cooling amount can be used to adjust the initial temperature of the power battery to any temperature between the working lower limit temperature and the working upper limit temperature.

[0113] As an example, the battery pre-cooling amount can be used to adjust the initial temperature of the power battery to the working lower limit temperature. At this time, the stored heat of the power battery during the planned journey can be determined according to the working lower limit temperature and the working upper limit temperature, and the stored heat at this time is the maximum stored heat of the power battery.

[0114] Step S520: Pre-start the battery cooling system according to the pre-cooling amount of the battery, so that the actual cooling power of the battery cooling system does not exceed the cooling upper limit power, and the temperature of the power battery at the end of the planned driving range does not exceed the working upper limit temperature of the power battery.

[0115] Specifically, the pre-cooling duration can be determined according to the selected actual cooling power and the pre-cooling amount of the battery. Exemplarily, the battery cooling system can be started before the planned driving range starts and operated at the selected actual cooling power for the pre-cooling duration, so that when the battery cooling system cools the power battery at the selected actual cooling power after the planned driving range starts, the temperature of the power battery does not exceed the working upper limit temperature. Exemplarily, the selected actual cooling power can be the cooling upper limit power, or any power between the cooling lower limit power and the cooling upper limit power. Exemplarily, the selected actual cooling power during pre-cooling and the selected actual cooling power after the planned driving range starts can be the same or different.

[0116] Specifically, after starting the battery cooling system to pre-cool the power battery before the planned driving range starts, after the planned driving range starts, the power battery can be cooled at an actual cooling power that does not exceed the cooling upper limit power, and the control target is to keep the temperature of the power battery not exceeding the working upper limit temperature during the planned driving range or before the end of the planned driving range. In other words, the control target is that the temperature of the power battery is equal to or reaches the working upper limit temperature at the end of the planned driving range.

[0117] In the above embodiment, when the cooling demand power is greater than the cooling upper limit power, the pre-cooling amount required for the power battery is determined, and the battery cooling system is pre-started according to the pre-cooling amount of the battery, so that the actual cooling power of the battery cooling system does not exceed the cooling upper limit power, and the temperature of the power battery at the end of the planned driving range does not exceed the working upper limit temperature of the power battery. In this way, when the estimated heat generation of the power battery during the planned driving range is too large, the power battery can be pre-cooled to reduce the probability of thermal runaway of the power battery during the planned driving range.

[0118] In some embodiments, the battery cooling system can be configured with an operating parameter determination table. The battery cooling system can determine the target operating parameters of the working state according to the real-time temperature data of the power battery and the operating parameter determination table. In other words, the battery cooling system can query the operating parameter determination table according to the real-time temperature data of the power battery and operate according to the obtained target operating parameters, that is, maintain and adjust the working state according to the obtained target operating parameters. Among them, the operating parameter determination table can be pre-calibrated.

[0119] In this embodiment, please refer to Figure 6, the temperature control method of the power battery may further include the following steps.

[0120] Step S610: Send the battery health state data of the power battery to the server, so that the server can correct the operation parameter determination table of the battery cooling system according to the battery health state data to obtain an operation parameter correction table.

[0121] In some cases, the battery cooling system may include a compressor and at least one electronic expansion valve. As an example, at least one electronic expansion valve may be configured in an evaporator, a plate heat exchanger, or a condenser. As an example, both the compressor and the electronic expansion valve may be configured with corresponding operation parameter determination tables, so that the compressor and the electronic expansion valve can query their respective corresponding operation parameter determination tables during operation to obtain their respective corresponding target operation parameters for operation. Among them, the operation parameter determination tables corresponding to the compressor and the electronic expansion valve respectively may be calibrated in advance by the server and then sent down.

[0122] Specifically, the server can correct the operation parameter determination tables corresponding to the compressor and the electronic expansion valve respectively that are calibrated in advance according to the received battery health state data of the power battery to obtain an operation parameter correction table. That is to say, the operation parameter correction table is used as a new operation parameter determination table.

[0123] Step S620: Receive the operation parameter correction table fed back by the server and use the operation parameter correction table as the operation parameter determination table.

[0124] Specifically, the operation parameter correction tables corresponding to the compressor and the electronic expansion valve respectively fed back by the server can be received, so that the compressor and the electronic expansion valve can update their respective operation parameter determination tables according to their respective corresponding operation parameter correction tables.

[0125] In the above embodiments, by sending the battery health status data to the server and receiving the operation parameter correction table fed back by the server, and using the operation parameter correction table as the operation parameter determination table for operating the battery cooling system, thus, based on the battery temperature range that does not exceed the working upper limit temperature maintained by the power battery during the planned journey, on the one hand, when the battery cooling system operates based on the corrected operation parameter determination table, it can have a relatively high and relatively constant battery cooling power, thereby improving the energy efficiency ratio of the battery cooling system, reducing the adjustment frequency of the battery cooling system, and further reducing the charge and discharge times of the power battery during the planned journey and reducing the excessive use of the power of the power battery for cooling the temperature of the power battery; on the other hand, when the power battery ages or fails, the battery cooling system can timely adjust the operation parameter determination table based on the aging or failure state of the power battery, so that the battery cooling system can be in the optimal power range, thereby reducing the probability of thermal runaway of the power battery; on the other hand, by taking the temperature of the power battery at the end of the planned journey being equal to or reaching the working upper limit temperature as the control target, while reducing the excessive use of the power of the power battery for cooling the temperature of the power battery, it also provides a basis for using a smaller displacement compressor in the battery cooling system, and can reduce the temperature control cost to a certain extent.

[0126] In some embodiments, estimating the heat generated by the power battery during the planned journey to obtain the estimated battery heat generation may include: estimating the heat generated by the power battery during the planned journey according to the planned journey related data to obtain the estimated battery heat generation.

[0127] Among them, the planned journey related data may include at least one of the journey mileage, journey road condition information, and vehicle electrical power consumption. The journey mileage may refer to the total distance or total length of the driving route. The journey road condition information may be the road slope information, tunnel information, weather information, etc. during the planned journey. The vehicle electrical power consumption may be the power consumption of the electrical appliances in the vehicle except the battery cooling system, for example, vehicle instruments, motors, etc.

[0128] Specifically, the planned journey related data can be obtained in combination with map data.

[0129] Exemplarily, the planned journey related data can be obtained from a mobile terminal or a server.

[0130] Exemplarily, the planned journey related data may further include the driving time and the estimated passing time.

[0131] Exemplarily, the planned journey related data may further include the road congestion degree information and the user habit information.

[0132] In the above embodiments, by estimating the estimated heat generation of the power battery during the planned trip based on at least one of the driving mileage, driving road conditions information, and vehicle electrical power consumption, the estimation of the estimated heat generation of the battery during the planned trip can be made more in line with the actual situation, and the accuracy of the estimation of the estimated heat generation of the battery during the planned trip can be improved.

[0133] An embodiment of the present application provides a temperature control method for a power battery. This temperature control method can be applied to a battery cooling system or an in-vehicle terminal in a battery cooling system. Please refer to Figure 7 This temperature control method may include the following steps.

[0134] Step S702: Estimate the heat generated by the power battery during the planned trip and determine the estimated heat generation of the battery.

[0135] Specifically, the heat generated by the power battery during the planned trip can be estimated based on the planned trip-related data to obtain the estimated heat generation of the battery; wherein, the planned trip-related data includes at least one of the driving mileage, driving road conditions information, and vehicle electrical power consumption.

[0136] Step S704: Determine the heat storage capacity of the power battery during the planned trip.

[0137] Specifically, the heat storage capacity of the power battery during the planned trip can be determined based on the upper working temperature and the initial temperature of the power battery; the initial temperature is the temperature of the power battery at the departure time of the planned trip.

[0138] Step S706: Determine the heat loss amount of the power battery during the planned trip.

[0139] Step S708: Estimate the cooling amount based on the estimated heat generation of the battery, the heat storage capacity, and the heat loss amount, and determine the cooling demand required by the power battery during the planned trip.

[0140] Step S710: Determine the cooling demand power based on the cooling demand and the estimated travel time of the planned trip.

[0141] Step S712: If the cooling demand power is less than the lower cooling power limit, do not start the battery cooling system.

[0142] Step S714: If the cooling demand power is not less than the lower cooling power limit and does not exceed the upper cooling power limit, determine the start time of the battery cooling system during the planned trip; start the battery cooling system at the start time so that the temperature of the power battery reaches the upper working temperature of the power battery at the end time of the planned trip.

[0143] Step S716: When the cooling demand power is greater than the cooling upper limit power, determine the required battery pre-cooling amount of the power battery; start the battery cooling system for pre-cooling in advance according to the battery pre-cooling amount, so that the actual cooling power of the battery cooling system during the planned journey does not exceed the cooling upper limit power, and the temperature of the power battery reaches the working upper limit temperature of the power battery at the end of the planned journey.

[0144] Embodiments of the present application provide a temperature control device for a power battery. This temperature control device can be applied to a battery cooling system or an in-vehicle terminal in a battery cooling system. Please refer to Figure 8 ., this temperature control device may include: a heat generation amount estimation module 810, a demand power determination module 820, and a temperature control module 830.

[0145] The heat generation amount estimation module 810 is used to estimate the heat generated by the power battery during the planned journey to obtain the estimated battery heat generation amount;

[0146] The demand power determination module 820 is used to determine the required cooling demand power of the power battery during the planned journey based on the estimated battery heat generation amount;

[0147] The temperature control module 830 is used to control the temperature of the power battery during the planned journey according to the cooling demand power.

[0148] In some embodiments, the temperature control device further includes: a heat storage amount determination module for determining the heat storage amount of the power battery during the planned journey; a heat loss amount determination module for determining the heat loss amount of the power battery during the planned journey.

[0149] In some embodiments, the demand power determination module is further used to estimate the cooling amount according to the estimated battery heat generation amount, heat storage amount, and heat loss amount, determine the required cooling demand of the power battery during the planned journey; and determine the cooling demand power according to the cooling demand and the estimated travel time of the planned journey.

[0150] In some embodiments, the heat storage amount determination module is further used to determine the heat storage amount of the power battery during the planned journey according to the working upper limit temperature and the initial temperature of the power battery; the initial temperature is the temperature of the power battery at the departure time of the planned journey.

[0151] In some embodiments, the power battery is equipped with a battery cooling system, and the battery cooling system has a cooling lower limit power; the temperature control module is further used to not start the battery cooling system when the cooling demand power is less than the cooling lower limit power.

[0152] In some embodiments, the power battery is configured with a battery cooling system, and the battery cooling system has a cooling lower limit power and a cooling upper limit power; the temperature control module is further configured to determine the starting moment of the battery cooling system during the planned journey when the cooling demand power is not less than the cooling lower limit power and less than the cooling upper limit power; and start the battery cooling system at the starting moment so that the temperature of the power battery at the end of the planned journey does not exceed the working upper limit temperature of the power battery.

[0153] In some embodiments, the power battery is configured with a battery cooling system, and the battery cooling system has a cooling upper limit power; the temperature control module is further configured to determine the required battery pre-cooling amount of the power battery when the cooling demand power is greater than the cooling upper limit power; and pre-start the battery cooling system according to the battery pre-cooling amount so that the actual cooling power of the battery cooling system does not exceed the cooling upper limit power, and the temperature of the power battery at the end of the planned journey does not exceed the working upper limit temperature of the power battery.

[0154] In some embodiments, the battery cooling system is configured with an operating parameter determination table, and the battery cooling system can determine the target operating parameters in the working state according to the real-time temperature data of the power battery and the operating parameter determination table; the temperature control device further includes: a data sending module, configured to send the battery health state data of the power battery to the server so that the server can correct the operating parameter determination table of the battery cooling system according to the battery health state data to obtain an operating parameter correction table; and a data receiving module, configured to receive the operating parameter correction table fed back by the server and use the operating parameter correction table as the operating parameter determination table.

[0155] In some embodiments, the heat generation amount estimation module is further configured to estimate the heat generated by the power battery during the planned journey according to the planned journey related data to obtain the estimated battery heat generation amount; wherein, the planned journey related data includes at least one of the journey mileage, the journey road condition information, and the vehicle electrical power consumption.

[0156] Regarding the specific functions and effects achieved by the temperature control device, reference may be made to other embodiments of the present application for explanation, which will not be elaborated herein. Each module in the temperature control device can be implemented in whole or in part by software, hardware, and their combination. Each module can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0157] Please refer to Figure 9 , in some embodiments, a computer device can be provided, including a memory and a processor, and a computer program is stored in the memory. When the processor executes the computer program, the temperature control method in the above embodiments is implemented.

[0158] Embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a computer, the computer executes the temperature control method in any of the above embodiments.

[0159] Embodiments of the present application also provide a computer program product containing instructions. When the instructions are executed by a computer, the computer executes the temperature control method in any of the above embodiments.

[0160] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structural diagram may be as Figure 9 shown. The computer device includes a processor, a memory, and a communication interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner. The wireless manner can be implemented through WIFI, a carrier network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, the temperature control method is implemented.

[0161] It can be understood that the specific examples in this article are only to help those skilled in the art better understand the embodiments of the present application, rather than limiting the scope of the present invention.

[0162] It can be understood that in various embodiments of the present application, the magnitudes of the sequence numbers of the various processes do not mean the order of execution. The order of execution of the various processes should be determined according to their functions and internal logics, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0163] It can be understood that the various embodiments described in the present application can be implemented alone or in combination, and the embodiments of the present application do not limit this.

[0164] Unless otherwise specified, all technical and scientific terms used in the embodiments of the present application have the same meaning as commonly understood by those skilled in the technical field of the present application. The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the scope of the present application. The term "and / or" used in the embodiments of the present application and the appended claims includes any and all combinations of one or more of the related listed items. The singular forms "a", "above", and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0165] It can be understood that the processor in the embodiments of the present application can be an integrated circuit chip with the ability to process signals. In the implementation process, each step of the above method embodiments can be completed by the integrated logic circuit in the hardware of the processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. This storage medium is located in the memory, and the processor reads the information in the memory and combines its hardware to complete the steps of the above method.

[0166] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0167] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0168] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0169] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0170] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0171] In addition, in each embodiment of the present application, the functional units can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

[0172] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present application, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0173] The above is only the specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application and should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A temperature control method for a power battery, characterized in that: The method comprises: Estimate the heat generated by the power battery during the planned journey to obtain the estimated heat generation of the battery; Determining the cooling demand power required for the power battery during the planned trip based on the estimated heating value of the battery; The power battery is temperature controlled during the planned trip according to the cooling demand power.

2. The temperature control method according to claim 1, characterized in that: Before determining the cooling demand power required by the power battery in the planned trip based on the estimated heating value of the battery, the method further includes: Determining the heat storage and heat loss of the power battery during the planned trip; The determining the cooling demand power required by the power battery in the planned trip based on the estimated heating value of the battery includes: Estimating the cooling amount according to the estimated heat generation of the battery, the heat storage, and the heat loss, and determining the cooling demand required for the power battery during the planned trip; The cooling demand power is determined according to the cooling demand and the estimated travel time of the planned trip.

3. The temperature control method according to claim 2, characterized in that: Determining the heat storage amount of the power battery during the planned trip includes: The heat storage amount of the power battery in the planned trip is determined according to the upper operating limit temperature and the initial temperature of the power battery; the initial temperature is the temperature of the power battery at the departure time of the planned trip.

4. The temperature control method according to any one of claims 1 to 3, characterized in that: The power battery is equipped with a battery cooling system, and the battery cooling system has a cooling lower limit power; and the temperature of the power battery is controlled during the planned trip according to the cooling demand power, including: When the required cooling power is less than the lower cooling power limit, the battery cooling system is not started.

5. The temperature control method according to any one of claims 1 to 3, characterized in that: The power battery is equipped with a battery cooling system, and the battery cooling system has a lower cooling power limit and an upper cooling power limit; and the temperature of the power battery is controlled during the planned trip according to the cooling demand power, including: When the cooling demand power is not less than the cooling lower limit power and less than the cooling upper limit power, determining a start time of the battery cooling system in the planned trip; The battery cooling system is started at the start time, so that the temperature of the power battery does not exceed the upper limit operating temperature of the power battery at the end time of the planned trip.

6. The temperature control method according to any one of claims 1 to 3, characterized in that: The power battery is equipped with a battery cooling system, and the battery cooling system has a cooling upper limit power; and the temperature of the power battery is controlled during the planned trip according to the cooling demand power, including: When the cooling demand power is greater than the cooling upper limit power, determining a battery pre-cooling amount required for the power battery; The battery cooling system is pre-started according to the battery pre-cooling amount, so that the actual cooling power of the battery cooling system does not exceed the cooling upper limit power, and the temperature of the power battery does not exceed the operating upper limit temperature of the power battery at the end of the planned trip.

7. The temperature control method according to any one of claims 1 to 3, characterized in that: The battery cooling system is configured with an operating parameter determination table, and the battery cooling system can determine the target operating parameters of the battery cooling system in a working state according to the real-time temperature data of the power battery and the operating parameter determination table; the method further includes: Sending the battery health status data of the power battery to a server, so that the server can correct the operating parameter determination table of the battery cooling system according to the battery health status data to obtain an operating parameter correction table; The operating parameter correction table fed back by the server is received, and the operating parameter correction table is used as an operating parameter determination table.

8. The temperature control method according to any one of claims 1 to 3, characterized in that: The estimating the heat generated by the power battery during the planned trip to obtain the estimated heat generated by the battery includes: The heat generated by the power battery during the planned trip is estimated according to the planned trip related data to obtain the estimated heating value of the battery; wherein the planned trip related data includes at least one of the trip mileage, trip road condition information, and vehicle electrical power consumption.

9. A temperature control device for a power battery, characterized in that: The device comprises: The heat generation estimation module is used to estimate the heat generated by the power battery during the planned trip and obtain the estimated heat generation of the battery; A required power determination module, used to determine the required cooling power of the power battery during the planned trip based on the estimated heating value of the battery; A temperature control module is used to control the temperature of the power battery during the planned trip according to the cooling demand power.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the temperature control method according to any one of claims 1 to 8 is implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the temperature control method according to any one of claims 1 to 8 is implemented.

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