A power battery thermal management method, device, equipment and medium

Abstract

The application discloses a power battery thermal management method, device, equipment and medium, comprising: if it is detected that a vehicle has a charging intention, and the current temperature of the power battery of the vehicle is not within a preset temperature range, determining a preset temperature change energy consumption required for changing the temperature of the power battery from the current temperature to a target temperature; determining the basic energy consumption of the vehicle within a preset time length; if the preset temperature change energy consumption, the basic energy consumption and the current remaining power of the power battery satisfy a preset relationship, controlling a heat exchange device to change the temperature of the power battery from the current temperature to the target temperature before a preset charging time. The application can ensure that the power battery can be at a suitable working temperature during charging, which can ensure that the charging effect is good during the charging process, such as shortening the charging time, improving the charging capacity and the like, and on the other hand, can also reduce the occurrence probability of thermal runaway phenomenon of the power battery during the charging process, and improve the safety during the charging process.

Description

Technical Field

[0001] This invention relates to the field of power battery technology, and in particular to a power battery thermal management method, apparatus, equipment, and medium. Background Technology

[0002] New energy vehicles typically use power batteries as their power source, and these batteries need to operate at a suitable temperature to ensure good charging performance. During charging, excessively high or low battery temperatures can lead to decreased charging efficiency and even safety hazards. Therefore, ensuring that the power battery is within the appropriate operating temperature range before charging begins is a pressing issue that needs to be addressed. Summary of the Invention

[0003] This application provides a power battery thermal management method, apparatus, device, and medium, which solves the technical problem in the prior art that it is impossible to guarantee that the power battery is in a suitable operating temperature range before charging begins. It achieves the technical effect of ensuring that the power battery is in a suitable operating temperature range before charging begins, thus ensuring better charging performance and improving the safety of the charging process.

[0004] Firstly, this application provides a method for thermal management of a power battery, the method comprising:

[0005] If a vehicle is detected to be charging, and the current temperature of the vehicle's power battery is not within the preset temperature range, the preset temperature change energy consumption required to change the temperature of the power battery from the current temperature to the target temperature is determined. The target temperature is the temperature within the preset temperature range.

[0006] Determine the vehicle's basic energy consumption within a preset time period, where the preset time period refers to the duration between the current moment and the preset charging moment;

[0007] If the preset temperature-dependent energy consumption, basic energy consumption, and the current remaining charge of the power battery meet the preset relationship, the heat exchange equipment will be controlled to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time.

[0008] Furthermore, the preset temperature change energy consumption required for the power battery temperature to change from the current temperature to the target temperature is determined, including:

[0009] The preset temperature-dependent energy consumption is determined based on the battery parameters of the power battery, the heat exchange parameters between the power battery and the heat exchange equipment, and the temperature difference between the current temperature and the target temperature.

[0010] Furthermore, it is determined whether the preset temperature-dependent energy consumption, basic energy consumption, and the current remaining charge of the power battery meet the preset relationships, including:

[0011] If the heat exchange parameter of the power battery changes from the current temperature to the target temperature is the first heat exchange efficiency, determine whether the current remaining power of the power battery meets the basic energy consumption and the preset temperature change energy consumption corresponding to the first heat exchange efficiency.

[0012] If the current remaining charge of the power battery does not meet the basic energy consumption and the preset temperature change energy consumption corresponding to the first heat exchange efficiency, the heat exchange parameter is determined to be the preset temperature change energy consumption corresponding to the second heat exchange efficiency, and it is determined whether the current remaining charge of the power battery meets the basic energy consumption and the preset temperature change energy consumption corresponding to the second heat exchange efficiency; wherein, the first heat exchange efficiency is greater than the second heat exchange efficiency.

[0013] Furthermore, controlling the heat exchange equipment to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time includes:

[0014] Based on the preset temperature change energy consumption and the equipment parameters of the heat exchange equipment, determine the target operating parameters of the heat exchange equipment;

[0015] The heat exchange equipment is controlled to operate according to the target operating parameters, so that the heat exchange equipment changes the temperature of the power battery from the current temperature to the target temperature before the preset charging time.

[0016] Furthermore, the preset temperature range is determined based on the vehicle's preset charging mode and the corresponding usage habits.

[0017] Furthermore, the basic energy consumption of the vehicle within a preset time period is determined, including:

[0018] The vehicle's basic energy consumption is determined based on the vehicle's driving energy consumption and control energy consumption within a preset time period.

[0019] Further, determine the vehicle's driving energy consumption, including:

[0020] The vehicle's driving energy consumption is determined based on the driving distance and the vehicle's average energy consumption within a preset time period.

[0021] Secondly, this application provides a power battery thermal management device, the device comprising:

[0022] The temperature change energy consumption determination module is used to determine the preset temperature change energy consumption required for the power battery temperature to change from the current temperature to the target temperature when the vehicle is detected to have a charging intention and the current temperature of the vehicle's power battery is not within the preset temperature range. The target temperature is a temperature within the preset temperature range.

[0023] The basic energy consumption determination module is used to determine the basic energy consumption of the vehicle within a preset time period, which refers to the time between the current moment and the preset charging moment.

[0024] The control module is used to control the heat exchange equipment to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time, when the preset temperature change energy consumption, basic energy consumption and the current remaining power of the power battery meet the preset relationship.

[0025] Furthermore, the temperature-varying energy consumption determination module includes:

[0026] The temperature-varying energy consumption determination submodule is used to determine the preset temperature-varying energy consumption based on the battery parameters of the power battery, the heat exchange parameters between the power battery and the heat exchange equipment, and the temperature difference between the current temperature and the target temperature.

[0027] Furthermore, the device also includes a judgment module, used to determine whether the preset temperature-varying energy consumption, basic energy consumption, and the current remaining power of the power battery meet the preset relationship. Specifically, when the heat exchange parameter for the power battery to change from the current temperature to the target temperature is the first heat exchange efficiency, the module determines whether the current remaining power of the power battery meets the preset temperature-varying energy consumption corresponding to the basic energy consumption and the first heat exchange efficiency. It is also used to determine the preset temperature-varying energy consumption corresponding to the second heat exchange efficiency when the current remaining power of the power battery does not meet the preset temperature-varying energy consumption corresponding to the basic energy consumption and the first heat exchange efficiency, and to determine whether the current remaining power of the power battery meets the preset temperature-varying energy consumption corresponding to the basic energy consumption and the second heat exchange efficiency. The first heat exchange efficiency is greater than the second heat exchange efficiency.

[0028] Furthermore, the control module also includes:

[0029] The operating parameter determination submodule is used to determine the target operating parameters of the heat exchange equipment based on the preset temperature change energy consumption and the equipment parameters of the heat exchange equipment;

[0030] The control submodule is used to control the heat exchange equipment to operate according to the target operating parameters, so that the heat exchange equipment changes the temperature of the power battery from the current temperature to the target temperature before the preset charging time.

[0031] Furthermore, the preset temperature range is determined based on the vehicle's preset charging mode and the corresponding usage habits.

[0032] Furthermore, the basic energy consumption determination module includes:

[0033] The basic energy consumption determination submodule is used to determine the vehicle's basic energy consumption based on the vehicle's driving energy consumption and control energy consumption within a preset time period.

[0034] Furthermore, the basic energy consumption determination submodule is also used to determine the vehicle's driving energy consumption based on the driving distance and the vehicle's average energy consumption within a preset time period.

[0035] Thirdly, this application provides an electronic device, comprising:

[0036] processor;

[0037] Memory used to store processor-executable instructions;

[0038] The processor is configured to execute a power battery thermal management method as provided in the first aspect.

[0039] Fourthly, this application provides a non-transitory computer-readable storage medium that, when the instructions in the storage medium are executed by the processor of an electronic device, enables the electronic device to perform a power battery thermal management method as provided in the first aspect.

[0040] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0041] In this embodiment, when a vehicle is detected to be charging and the temperature of the power battery is not within a preset temperature range, the preset temperature-change energy consumption corresponding to changing the current temperature of the power battery to the target temperature and the basic energy consumption of the vehicle before charging are determined. If the current remaining power of the power battery can support the preset temperature-change energy consumption and the basic energy consumption, the heat exchange equipment can be controlled to change the temperature of the power battery from the current temperature to the target temperature. This ensures that the power battery is at a suitable operating temperature during charging, which on the one hand ensures a better charging effect during the charging process, such as shortening the charging time and increasing the charging capacity, and on the other hand reduces the probability of thermal runaway of the power battery during charging, thus improving the safety of the charging process. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A flowchart illustrating a power battery thermal management method provided in this application;

[0044] Figure 2 This application provides a schematic diagram of the structure of a power battery thermal management device.

[0045] Figure 3 This is a schematic diagram of the structure of an electronic device provided in this application. Detailed Implementation

[0046] This application provides a power battery thermal management method, which solves the technical problem in the prior art that it is impossible to guarantee that the power battery is in a suitable operating temperature range before charging begins.

[0047] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0048] A power battery thermal management method includes: if a vehicle is detected to have a charging intention and the current temperature of the vehicle's power battery is not within a preset temperature range, determining a preset temperature change energy consumption required to change the temperature of the power battery from the current temperature to a target temperature, wherein the target temperature is a temperature within the preset temperature range; determining the basic energy consumption of the vehicle within a preset time period, wherein the preset time period refers to the time between the current moment and a preset charging moment; and if the preset temperature change energy consumption, basic energy consumption, and the current remaining charge of the power battery satisfy a preset relationship, controlling a heat exchange device to change the temperature of the power battery from the current temperature to the target temperature before the preset charging moment.

[0049] In this embodiment, when a vehicle is detected to be charging and the temperature of the power battery is not within a preset temperature range, the preset temperature-change energy consumption corresponding to changing the current temperature of the power battery to the target temperature and the basic energy consumption of the vehicle before charging are determined. If the current remaining power of the power battery can support the preset temperature-change energy consumption and the basic energy consumption, the heat exchange equipment can be controlled to change the temperature of the power battery from the current temperature to the target temperature. This ensures that the power battery is at a suitable operating temperature during charging, which on the one hand ensures a better charging effect during the charging process, such as shortening the charging time and increasing the charging capacity, and on the other hand reduces the probability of thermal runaway of the power battery during charging, thus improving the safety of the charging process.

[0050] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0051] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0052] New energy vehicles typically use power batteries as their power source, and these batteries need to operate at a suitable temperature to ensure good charging performance. If the battery's operating temperature is too high during charging, the internal chemical reactions will become abnormally intense, increasing the likelihood of thermal runaway and posing a safety hazard. Conversely, if the battery's operating temperature is too low, the activity of the positive and negative electrode materials and the conductivity of the electrolyte will decrease, reducing the battery capacity and resulting in slower charging efficiency and less energy ultimately stored. Therefore, ensuring that the power battery is within a suitable operating temperature range before charging begins is a pressing issue that needs to be addressed.

[0053] To address the aforementioned problems, this embodiment provides the following: Figure 1 The illustration shows a power battery thermal management method, which includes steps S11-S13. The power battery thermal management method provided in this embodiment can be executed by an on-board controller.

[0054] Step S11: If the vehicle is detected to have a charging intention and the current temperature of the vehicle's power battery is not within the preset temperature range, determine the preset temperature change energy consumption required for the power battery temperature to change from the current temperature to the target temperature. The target temperature is the temperature within the preset temperature range.

[0055] Step S12: Determine the vehicle's basic energy consumption within a preset time period, where the preset time period refers to the time between the current moment and the preset charging moment.

[0056] Step S13: If the preset temperature change energy consumption, basic energy consumption and the current remaining power of the power battery meet the preset relationship, control the heat exchange device to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time.

[0057] Regarding step S11, if the vehicle is detected to have a charging intention and the current temperature of the vehicle's power battery is not within the preset temperature range, the preset temperature change energy consumption required for the power battery temperature to change from the current temperature to the target temperature is determined, where the target temperature is a temperature within the preset temperature range.

[0058] Before or during step S11, it is necessary to detect whether the vehicle intends to charge and to determine whether the current temperature of the power battery is within the preset temperature range.

[0059] One method to detect a vehicle's intention to charge is to determine if its current navigation destination is a charging station. If the current navigation destination is a charging station, the vehicle is considered to have a charging intention. Alternatively, it can be determined by detecting whether a target signal is received. This target signal can be a charging signal sent by the driver or passengers to the vehicle controller via a fixed button or mobile device. If such a target signal is detected, the vehicle is considered to have a charging intention.

[0060] The preset temperature range refers to the temperature range in which the power battery can achieve a better charging effect. The charging effect can be measured by factors such as charging time, charging capacity, activity of positive and negative electrode materials, conductivity of electrolyte, and probability of thermal runaway.

[0061] The preset temperature range can be determined based on the vehicle's preset charging mode and the corresponding usage habits. The preset charging mode refers to the charging mode set for this current charge, such as fast charging or slow charging. The corresponding usage habits refer to the frequency of use and typical charging time of this charging mode in historical charging processes.

[0062] The minimum and maximum values ​​within the preset temperature range are recorded as the lower limit and upper limit, respectively. If the current temperature of the power battery is between the lower and upper limits, the battery temperature is considered suitable, and charging the battery at this time will result in better charging performance. If the current temperature of the power battery is below the lower limit, it is considered low, and heating is required. If the current temperature is above the upper limit, it is considered high, and cooling is required. In both cases, steps S11-S13 should be executed.

[0063] It is important to note that heating or cooling the power battery can rely on heat exchange equipment, which can be a radiator installed on the power battery, such as a water-cooled plate. The power source for this heat exchange equipment is the electricity stored in the power battery itself.

[0064] When a vehicle intends to charge, and the current temperature of the power battery is not within the preset temperature range, the preset temperature change energy consumption required for the power battery temperature to change from the current temperature to the target temperature can be determined. The preset temperature change energy consumption is simply the energy consumed by the preset temperature change. Changing the power battery temperature from the current temperature to the target temperature includes two directions: heating (where the current temperature is low and the target temperature is higher) and cooling (where the current temperature is high and the target temperature is lower).

[0065] The target temperature is a temperature within a preset temperature range. You can directly select any temperature within the preset temperature range as the target temperature, or you can determine it based on the relationship between the current temperature and the target temperature (i.e., the direction of temperature change), the vehicle's preset charging mode, and the usage habits corresponding to the preset charging mode.

[0066] If the current temperature is lower than the target temperature (i.e., under heating conditions), and the frequency of fast charging is higher than the frequency of slow charging, then the target temperature corresponding to fast charging mode can be higher than the target temperature corresponding to slow charging mode. If the current temperature is higher than the target temperature (i.e., under cooling conditions), and the frequency of fast charging is higher than the frequency of slow charging, then the target temperature corresponding to fast charging mode can be lower than the target temperature corresponding to slow charging mode.

[0067] After determining the target temperature, the required preset temperature-varying energy consumption is determined based on the current temperature and the target temperature. This can be achieved in the following way.

[0068] The preset temperature-dependent energy consumption is determined based on the battery parameters of the power battery, the heat exchange parameters between the power battery and the heat exchange equipment, and the temperature difference between the current temperature and the target temperature.

[0069] Battery parameters include electrolyte specific heat capacity and battery weight. The heat exchange parameters between the power battery and the heat exchange equipment refer to the efficiency of heat exchange between the two devices, and also the percentage of heat loss between them.

[0070] Based on the temperature difference between the current temperature and the target temperature, as well as the battery parameters of the power battery, the effective heat required for the power battery to change from the current temperature to the target temperature can be determined. Based on the effective heat and the heat exchange parameters between the power battery and the heat exchange equipment, the total heat that the heat exchange equipment needs to provide or remove, i.e., the preset temperature change energy consumption, can be determined, including effective heat and ineffective heat, as shown in Formula 1 below.

[0071]

[0072] Among them, W 总 To preset the energy consumption due to temperature changes, T target T is the target temperature for the power battery. current Here, c1 is the target temperature of the power battery, m1 is the specific heat capacity of the electrolyte in the power battery, h is the mass of the power battery, and h is the heat exchange parameter between the power battery and the heat exchange equipment.

[0073] Among these parameters, heat transfer parameters affect how quickly the power battery changes from its current temperature to its target temperature. These parameters can be represented by the temperature change of the power battery per unit time, or by the amount of heat exchanged by the power battery per unit time.

[0074] Generally speaking, the greater the temperature difference between the heat exchange equipment and the power battery, the faster the heat exchange rate, that is, the higher the heat exchange efficiency. However, relatively speaking, the heat exchange equipment will lose more heat.

[0075] For example, if the current temperature of the power battery is 10℃ and the target temperature is 25℃, and the heat exchanger heats the power battery at 45℃, it will take 5 minutes for the battery temperature to change to 25℃. If the heat exchanger heats the power battery at 28℃, it will take 20 minutes for the battery temperature to change to 25℃. It is clear that the former heats up faster, while the latter heats up more slowly.

[0076] However, it's important to note that while the former heats up faster, it also loses more heat, requiring a greater total amount of heat to achieve a faster temperature change. In practice, the relationship between the total amount of heat generated during the battery temperature change and the rate of temperature change can be measured, and heat exchange parameters can be selected based on requirements.

[0077] Regarding step S12, determine the vehicle's basic energy consumption within a preset time period, where the preset time period refers to the duration between the current moment and the preset charging moment.

[0078] After executing step S11, it can be determined whether the current battery needs to be heated or cooled. The energy for heating or cooling comes from the electricity stored in the power battery itself, and the corresponding energy is recorded as the preset temperature-varying energy consumption. Before the power battery starts charging, it also needs to supply other energy consumption of the vehicle, such as driving energy consumption and control energy consumption of various devices on the vehicle. Driving energy consumption refers to the energy consumed by the vehicle while traveling on the road before reaching the charging station. In this embodiment, the other energy consumption that the power battery also needs to supply to the vehicle is recorded as basic energy consumption.

[0079] The basic energy consumption can be determined based on the vehicle's driving energy consumption and control energy consumption within a preset time period.

[0080] The driving energy consumption can be determined based on the driving distance and the vehicle's average energy consumption within a preset time period. The driving distance can be determined based on the vehicle's current location and the location of the charging station, or it can be determined based on navigation information. The preset time period can be determined based on the vehicle's average speed and driving distance, or it can be determined directly based on navigation information. The vehicle's average energy consumption can be determined based on the vehicle's historical driving data. The preset charging time can be determined based on the current time and the preset time period.

[0081] Regarding step S13, if the preset temperature change energy consumption, basic energy consumption, and the current remaining power of the power battery meet the preset relationship, the heat exchange device is controlled to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time.

[0082] Before or during step S13, it is necessary to determine whether the preset temperature-varying energy consumption, basic energy consumption, and the current remaining power of the power battery satisfy the preset relationship. This step can include the following situations when using different heat exchange parameters. Among them, the preset relationship can refer to the current remaining power being greater than the sum of the power corresponding to the preset temperature-varying energy consumption and basic energy consumption. Of course, the preset relationship can also be as shown in Formula 2.

[0083] SOC current >k*SOC road +SOC THM Formula 2

[0084] Among them, SOC current The current remaining charge of the power battery; k is a coefficient, usually greater than or equal to 2; SOC road SOC (State of Charge) is the amount of electricity required to achieve basic energy consumption. THM The amount of electricity corresponding to the preset temperature-dependent energy consumption.

[0085]

Scenario 1

[0086] If the heat exchange parameter of the power battery changing from the current temperature to the target temperature is the first heat exchange efficiency, determine whether the current remaining power of the power battery meets the basic energy consumption and the preset temperature change energy consumption corresponding to the first heat exchange efficiency.

[0087] If the current remaining charge of the power battery meets the preset temperature change energy consumption corresponding to the basic energy consumption and the first heat exchange efficiency, then the heat exchange device is controlled to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time (see the following explanation for this step, which will not be repeated here).

[0088] Scenario 2

[0089] If the heat exchange parameter of the power battery changes from the current temperature to the target temperature is the first heat exchange efficiency, determine whether the current remaining power of the power battery meets the basic energy consumption and the preset temperature change energy consumption corresponding to the first heat exchange efficiency.

[0090] If the current remaining charge of the power battery does not meet the basic energy consumption and the preset temperature-varying energy consumption corresponding to the first heat exchange efficiency, the preset temperature-varying energy consumption corresponding to the second heat exchange efficiency is determined, and it is then determined whether the current remaining charge of the power battery meets the basic energy consumption and the preset temperature-varying energy consumption corresponding to the second heat exchange efficiency. The first heat exchange efficiency is greater than the second heat exchange efficiency.

[0091] "To determine whether the current remaining charge of the power battery meets the preset temperature change energy consumption corresponding to the basic energy consumption and the second heat exchange efficiency", see Case 3 and Case 4 below.

[0092] [Scenario 3]

[0093] If the heat exchange parameter of the power battery changes from the current temperature to the target temperature is the second heat exchange efficiency, determine whether the current remaining power of the power battery meets the basic energy consumption and the preset temperature change energy consumption corresponding to the second heat exchange efficiency.

[0094] If the current remaining charge of the power battery meets the preset temperature change energy consumption corresponding to the basic energy consumption and the second heat exchange efficiency, the heat exchange equipment is controlled to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time (see the following explanation for this step, which will not be repeated here).

[0095] If the current remaining charge of the power battery does not meet the preset temperature change energy consumption corresponding to the basic energy consumption and the second heat exchange efficiency, the step of "controlling the heat exchange equipment to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time" will not be executed, that is, the temperature of the power battery will not be changed before charging.

[0096] Regarding scenario one, for the rapid heat exchange mode that uses the first heat exchange efficiency to change the temperature of the power battery, if the current remaining charge of the power battery can meet the preset temperature change energy consumption corresponding to the first heat exchange efficiency and the basic energy consumption of the vehicle, then the first heat exchange efficiency can be used to change the temperature of the power battery.

[0097] In case two, when using the fast heat exchange mode, if the current remaining charge of the power battery cannot meet the preset temperature change energy consumption corresponding to the first heat exchange efficiency and the basic energy consumption of the vehicle, the heat exchange parameters can be reduced (i.e., the second heat exchange efficiency is adopted) to determine whether the current remaining charge of the power battery can meet the preset temperature change energy consumption corresponding to the second heat exchange efficiency and the basic energy consumption of the vehicle, that is, to determine whether the current remaining charge of the power battery meets the slow heat exchange mode.

[0098] Regarding scenario three, for the slow heat exchange mode that uses the second heat exchange efficiency to change the battery temperature, if the current remaining charge meets the requirements of the slow heat exchange mode, then the battery temperature will be changed according to the second heat exchange efficiency. If the current remaining charge cannot meet the requirements of the slow heat exchange mode, then the battery temperature will not be changed.

[0099] In any of the above situations, after determining that the current remaining power of the power battery, the preset temperature change energy consumption, and the basic energy consumption meet the preset relationship, the step of controlling the heat exchange device to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time can be executed. This step can specifically include steps S131 and S132.

[0100] Step S131: Determine the target operating parameters of the heat exchange equipment based on the preset temperature change energy consumption and the equipment parameters of the heat exchange equipment.

[0101] Step S132: Control the heat exchange equipment to operate according to the target operating parameters, so that the heat exchange equipment changes the temperature of the power battery from the current temperature to the target temperature before the preset charging time.

[0102] Equipment parameters include the specific heat capacity and weight of the heat exchange medium. Based on the preset temperature change energy consumption and the heat exchange equipment, the target operating parameters of the heat exchange equipment can be determined, or in other words, the correlation between the various target operating parameters of the heat exchange equipment can be determined, as detailed in Formula 3. When the heat exchange medium of the heat exchange equipment is a coolant, the target operating parameters include the inflow temperature and outflow temperature of the heat exchange medium in the heat exchange equipment, and may also include the flow rate, etc.

[0103]

[0104] Where C2 is the specific heat capacity of the coolant, M2 is the weight of the coolant, and T in T is the temperature of the coolant when it flows into the heat exchanger. out W is the temperature of the coolant when it flows out of the heat exchanger. 总 The preset energy consumption is based on temperature changes.

[0105] After determining the target operating parameters of the heat exchange equipment, the heat exchange equipment is controlled to operate according to the target operating parameters, so that the heat exchange equipment changes the temperature of the power battery from the current temperature to the target temperature.

[0106] In summary, when the embodiment of this application detects that the vehicle intends to charge and the temperature of the power battery is not within the preset temperature range, it determines the preset temperature-change energy consumption corresponding to changing the current temperature of the power battery to the target temperature, as well as the basic energy consumption of the vehicle before charging. If the current remaining power of the power battery can support the preset temperature-change energy consumption and the basic energy consumption, the heat exchange equipment can be controlled to change the temperature of the power battery from the current temperature to the target temperature. This ensures that the power battery is at a suitable operating temperature during charging, which on the one hand ensures a better charging effect during the charging process, such as shortening the charging time and increasing the charging capacity, and on the other hand reduces the probability of thermal runaway of the power battery during charging, thus improving the safety of the charging process.

[0107] Based on the same inventive concept, the embodiments of this application provide, as follows: Figure 2 The power battery thermal management device shown includes:

[0108] Temperature change energy consumption determination module 21 is used to determine the preset temperature change energy consumption required for the power battery temperature to change from the current temperature to the target temperature when the vehicle is detected to have a charging intention and the current temperature of the vehicle's power battery is not within the preset temperature range. The target temperature is the temperature within the preset temperature range.

[0109] The basic energy consumption determination module 22 is used to determine the basic energy consumption of the vehicle within a preset time period, where the preset time period refers to the time period between the current moment and the preset charging moment.

[0110] The control module 23 is used to control the heat exchange device to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time, when the preset temperature change energy consumption, basic energy consumption and the current remaining power of the power battery meet the preset relationship.

[0111] Furthermore, the temperature-varying energy consumption determination module 21 includes:

[0112] The temperature-varying energy consumption determination submodule is used to determine the preset temperature-varying energy consumption based on the battery parameters of the power battery, the heat exchange parameters between the power battery and the heat exchange equipment, and the temperature difference between the current temperature and the target temperature.

[0113] Furthermore, the device also includes a judgment module, used to determine whether the preset temperature-varying energy consumption, basic energy consumption, and the current remaining power of the power battery meet the preset relationship. Specifically, when the heat exchange parameter for the power battery to change from the current temperature to the target temperature is the first heat exchange efficiency, the module determines whether the current remaining power of the power battery meets the preset temperature-varying energy consumption corresponding to the basic energy consumption and the first heat exchange efficiency. It is also used to determine the preset temperature-varying energy consumption corresponding to the second heat exchange efficiency when the current remaining power of the power battery does not meet the preset temperature-varying energy consumption corresponding to the basic energy consumption and the first heat exchange efficiency, and to determine whether the current remaining power of the power battery meets the preset temperature-varying energy consumption corresponding to the basic energy consumption and the second heat exchange efficiency. The first heat exchange efficiency is greater than the second heat exchange efficiency.

[0114] Furthermore, the control module 23 also includes:

[0115] The operating parameter determination submodule is used to determine the target operating parameters of the heat exchange equipment based on the preset temperature change energy consumption and the equipment parameters of the heat exchange equipment;

[0116] The control submodule is used to control the heat exchange equipment to operate according to the target operating parameters, so that the heat exchange equipment changes the temperature of the power battery from the current temperature to the target temperature before the preset charging time.

[0117] Furthermore, the preset temperature range is determined based on the vehicle's preset charging mode and the corresponding usage habits.

[0118] Furthermore, the basic energy consumption determination module 22 includes:

[0119] The basic energy consumption determination submodule is used to determine the vehicle's basic energy consumption based on the vehicle's driving energy consumption and control energy consumption within a preset time period.

[0120] Furthermore, the basic energy consumption determination submodule is also used to determine the vehicle's driving energy consumption based on the driving distance and the vehicle's average energy consumption within a preset time period.

[0121] Based on the same inventive concept, another embodiment of this application provides, as follows: Figure 3 An electronic device, comprising:

[0122] Processor 31;

[0123] Memory 32 is used to store executable instructions of processor 31;

[0124] The processor 31 is configured to execute a power battery thermal management method as described above.

[0125] Based on the same inventive concept, this application provides a non-transitory computer-readable storage medium. When the instructions in the storage medium are executed by the processor 31 of the electronic device, the electronic device is able to execute a power battery thermal management method as described above.

[0126] Since the electronic device described in this embodiment is an electronic device used to implement the information processing method in the embodiments of this application, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the information processing method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the information processing method in the embodiments of this application falls within the scope of protection of this application.

[0127] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0128] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0129] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0130] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0131] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0132] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A thermal management method for a power battery, characterized in that, The method includes: If a vehicle is detected to have a charging intention, and the current temperature of the vehicle's power battery is not within a preset temperature range, a preset temperature change energy consumption is determined for the power battery temperature to change from the current temperature to the target temperature, where the target temperature is a temperature within the preset temperature range. Determine the basic energy consumption of the vehicle within a preset time period, where the preset time period refers to the duration between the current moment and the preset charging moment; Determining whether the preset temperature-varying energy consumption, the basic energy consumption, and the current remaining charge of the power battery satisfy a preset relationship includes: if the heat exchange parameter of the power battery changing from the current temperature to the target temperature is a first heat exchange efficiency, determining whether the current remaining charge of the power battery satisfies the basic energy consumption and the preset temperature-varying energy consumption corresponding to the first heat exchange efficiency; if the current remaining charge of the power battery does not satisfy the basic energy consumption and the preset temperature-varying energy consumption corresponding to the first heat exchange efficiency, determining the preset temperature-varying energy consumption corresponding to the second heat exchange efficiency when the heat exchange parameter is a second heat exchange efficiency, and determining whether the current remaining charge of the power battery satisfies the basic energy consumption and the preset temperature-varying energy consumption corresponding to the second heat exchange efficiency; wherein, the first heat exchange efficiency is greater than the second heat exchange efficiency; If the preset temperature-varying energy consumption, the basic energy consumption, and the current remaining power of the power battery satisfy a preset relationship, the heat exchange device is controlled to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time.

2. The method as described in claim 1, characterized in that, The determination of the preset temperature change energy consumption required for the power battery temperature to change from the current temperature to the target temperature includes: The preset temperature-varying energy consumption is determined based on the battery parameters of the power battery, the heat exchange parameters between the power battery and the heat exchange device, and the temperature difference between the current temperature and the target temperature.

3. The method as described in claim 1, characterized in that, The controlled heat exchange device changes the temperature of the power battery from the current temperature to the target temperature before the preset charging time, including: Based on the preset temperature change energy consumption and the equipment parameters of the heat exchange equipment, the target operating parameters of the heat exchange equipment are determined; The heat exchange device is controlled to operate according to the target operating parameters, so that the heat exchange device changes the temperature of the power battery from the current temperature to the target temperature before the preset charging time.

4. The method as described in claim 1, characterized in that, The preset temperature range is determined based on the vehicle's preset charging mode and the corresponding usage habits.

5. The method as described in claim 1, characterized in that, Determining the basic energy consumption of the vehicle within a preset time period includes: The basic energy consumption of the vehicle is determined based on the vehicle's driving energy consumption and control energy consumption within the preset time period.

6. The method as described in claim 5, characterized in that, Determining the vehicle's driving energy consumption includes: The vehicle's driving energy consumption is determined based on the driving distance within the preset time period and the vehicle's average energy consumption.

7. A power battery thermal management device, characterized in that, The device includes: The temperature change energy consumption determination module is used to determine the preset temperature change energy consumption required for the power battery temperature to change from the current temperature to the target temperature when the vehicle is detected to have a charging intention and the current temperature of the vehicle's power battery is not within the preset temperature range. The target temperature is a temperature within the preset temperature range. A basic energy consumption determination module is used to determine the basic energy consumption of the vehicle within a preset time period, wherein the preset time period refers to the time period between the current moment and the preset charging moment. The judgment module is used to determine whether the preset temperature-varying energy consumption, basic energy consumption, and the current remaining power of the power battery meet the preset relationship. Specifically, when the heat exchange parameter for the power battery to change from the current temperature to the target temperature is the first heat exchange efficiency, it determines whether the current remaining power of the power battery meets the preset temperature-varying energy consumption corresponding to the basic energy consumption and the first heat exchange efficiency. It is also used to determine the preset temperature-varying energy consumption corresponding to the second heat exchange efficiency when the current remaining power of the power battery does not meet the preset temperature-varying energy consumption corresponding to the basic energy consumption and the first heat exchange efficiency, and to determine whether the current remaining power of the power battery meets the preset temperature-varying energy consumption corresponding to the basic energy consumption and the second heat exchange efficiency. Wherein, the first heat exchange efficiency is greater than the second heat exchange efficiency. The control module is used to control the heat exchange device to change the temperature of the power battery from the current temperature to the target temperature before the preset charging time when the preset temperature-varying energy consumption, the basic energy consumption, and the current remaining power of the power battery meet the preset relationship.

8. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute a power battery thermal management method as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform a power battery thermal management method as described in any one of claims 1 to 6.

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