Battery thermal management method and system, computer equipment and medium
By acquiring the target parameters of the power battery and calibrating the charger power and heater heating power, precise thermal management of lithium-ion power batteries in low-temperature environments was achieved, solving the problem of insufficient charging capacity and improving the charging and discharging performance of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-05
- Publication Date
- 2026-03-31
AI Technical Summary
Existing lithium-ion power batteries have insufficient charging capacity in low-temperature environments, and their thermal management strategies fail to effectively consider changes in ambient temperature and state of charge, resulting in poor accuracy in charging power prediction and affecting the battery's discharge and charging capabilities.
By acquiring target parameters of the power battery, such as ambient temperature, state of charge, and charging speed, the charging conditions are determined, and the charger power, heater heating power, and environmental dissipation power are calibrated based on these parameters to achieve precise thermal management of the power battery, including heating and cooling.
It improves the charging capability of lithium-ion power batteries in low-temperature environments, enhances the practicality of battery thermal management, takes into account the temperature rise lag after the battery thermal management strategy is deactivated, and improves the accuracy of charging power prediction.
Smart Images
Figure CN121756979A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery thermal management method and system, computer equipment and medium. Background Technology
[0002] The core power source of electric vehicles is the lithium-ion battery, which is a chemical battery that is greatly affected by temperature. Especially in low-temperature environments, lithium-ion batteries usually need to be preheated to provide discharge and charging capabilities. Therefore, improving the charging capacity of lithium-ion batteries typically requires preheating.
[0003] When a lithium-ion battery is fully charged and there is no other load consuming power, the actual charging power of the lithium-ion battery is the minimum of the On-board Charger (OBC) and the Maximum Allowable Power (MAP). When there is a load consuming power, the charging power will be even lower. Currently, when considering power consumption, the Positive-Temperature Coefficient (PTC) is calculated based on the rated power, without considering the changes in OBC with battery temperature and State of Charge (SOC). Furthermore, the lag in battery temperature rise after heating during charging is not considered, leading to poor accuracy in predicting battery thermal management charging capabilities. On the other hand, lithium-ion batteries are significantly affected by the environment during low-temperature slow charging, and current calculations of the environmental impact on batteries typically employ complex theoretical calculations, which are not very practical. Summary of the Invention
[0004] This application provides a battery thermal management method and system, a computer device and a medium to solve the existing technical problems.
[0005] This application provides a battery thermal management method, comprising the following steps: obtaining target parameters for thermal management of a power battery, wherein the thermal management includes heating and / or cooling; determining charging conditions for the power battery based on the ambient temperature and the charging speed of the power battery; determining power parameters under the charging conditions according to the target parameters; and performing thermal management on the power battery according to the power parameters.
[0006] In one embodiment of this application, if the target parameters include ambient temperature and the state of charge (SOC) of the power battery, and the power parameters include charger power, then the process of determining the power parameters under the charging conditions based on the target parameters and performing thermal management on the power battery according to the power parameters includes: calibrating the charger power based on the ambient temperature and the SOC of the power battery to obtain charger power for different ambient temperatures and different SOCs, and associating the charger power for different ambient temperatures and different SOCs to form a charger power table; matching the charger power corresponding to the charging conditions from the charger power table, and heating / / or cooling the power battery according to the matched charger power.
[0007] In one embodiment of this application, if the target parameters include: ambient temperature, state of charge of the power battery, and charging rate of the cells in the power battery, and the power parameters include the maximum allowable charging power, then the process of determining the power parameters under the charging conditions based on the target parameters and performing thermal management on the power battery according to the power parameters includes: calibrating the charging power of each cell in the power battery according to the ambient temperature, the charging rate of the cells in the power battery at different ambient temperatures and different states of charge, obtaining the charging power of each cell at different ambient temperatures and different states of charge, and associating the charging power of all cells at different ambient temperatures and different states of charge to form a table of the maximum allowable charging power of the power battery; matching the maximum allowable charging power corresponding to the charging conditions from the table of the maximum allowable charging power, and heating and / or cooling the power battery according to the matched maximum allowable charging power.
[0008] In one embodiment of this application, if the target parameters include: heater inlet water flow rate, heater voltage, and heater inlet water temperature, and the power parameters include heater heating power, then the process of determining the power parameters under the charging conditions based on the target parameters and performing thermal management on the power battery according to the power parameters includes: calibrating the heater heating power based on the heater inlet water flow rate, the heater voltage, and the heater inlet water temperature to obtain heater heating power for different inlet water flow rates, different voltages, and different inlet water temperatures; associating the heater heating power for different inlet water flow rates, different voltages, and different inlet water temperatures to form a heater heating power table; matching the heater heating power corresponding to the charging conditions from the heater heating power table; and heating and / or cooling the power battery according to the matched heater heating power.
[0009] In one embodiment of this application, if the target parameters include ambient temperature and the rate of change of power battery temperature, and the power parameters include environmental dissipation power, then the process of determining the power parameters under the charging conditions based on the target parameters and performing thermal management of the power battery according to the power parameters includes: calibrating the environmental dissipation power of the power battery based on the ambient temperature and the rate of change of power battery temperature to obtain the environmental dissipation power of the power battery under different ambient temperatures and different states of charge, and associating the environmental dissipation power of different ambient temperatures and different states of charge to form an environmental dissipation power table; matching the environmental dissipation power corresponding to the charging conditions from the environmental dissipation power table, and heating and / or cooling the power battery according to the matched environmental dissipation power.
[0010] In one embodiment of this application, the method further includes: at the end of thermal management, if the power battery experiences a temperature rise followed by a temperature drop, then the end time of thermal management is recorded as the initial time and the time when the power battery experiences a temperature drop is recorded as the end time; the temperature change value of the power battery is calculated based on the temperature values of the power battery at the initial time and the end time; the temperature change value of the power battery is calibrated according to different ambient temperatures, and the corresponding calibration result is used as a constraint condition for the next thermal management of the power battery.
[0011] In one embodiment of this application, if the power parameters include charger power, maximum allowable charging power, heater heating power, and environmental dissipation power, the method further includes: defining the charging conditions of the power battery at a temperature lower than a preset ambient temperature and / or a charging speed lower than a preset charging speed as target charging conditions; calculating the actual charging power under the target charging conditions based on the charger power, maximum allowable charging power, heater heating power, and environmental dissipation power under the target charging conditions; and adjusting the charging time of the power battery based on the actual charging power.
[0012] This application also provides a battery thermal management system, the system comprising: a data acquisition module for acquiring target parameters for thermal management of a power battery, the thermal management including heating and / or cooling; a charging condition module for determining the charging conditions of the power battery based on the ambient temperature and the charging speed of the power battery; and a thermal management module for determining power parameters under the charging conditions based on the target parameters, and performing thermal management of the power battery according to the power parameters.
[0013] This application also provides a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the battery thermal management method described in any one of the above.
[0014] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the battery thermal management method described in any one of the above.
[0015] The beneficial effects of this application are as follows: This application proposes a battery thermal management method and system, computer equipment, and medium. It obtains target parameters for thermal management of the power battery, including heating and / or cooling. Then, based on the ambient temperature and the charging speed of the power battery, it determines the charging conditions of the power battery. Next, it determines the power parameters under the charging conditions according to the target parameters and performs thermal management of the power battery according to the power parameters. Therefore, this application can obtain the influence of ambient temperature on the power battery through calibration, making it highly practical. Furthermore, when performing thermal management such as heating and / or cooling of the power battery, this application not only considers the changes in vehicle power-consuming components with ambient temperature and state of charge, but also considers the heating lag that occurs after the battery thermal management strategy is terminated, and incorporates the corresponding heating lag into the battery thermal management strategy at subsequent times. Attached Figure Description
[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0017] In the attached diagram:
[0018] Figure 1 This is a schematic flowchart of a battery thermal management method provided in one embodiment of this application; Figure 2 This is a schematic diagram of the hardware structure of a battery thermal management system provided in one embodiment of this application; Figure 3 This is a schematic diagram of the hardware structure of a computer device suitable for implementing one or more embodiments of this application. Detailed Implementation
[0019] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0020] It is understood that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0021] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present application. However, it will be apparent to those skilled in the art that embodiments of the present application may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present application.
[0022] Figure 1 A schematic flowchart of a battery thermal management method is shown. Specifically, in an exemplary embodiment, as... Figure 1 As shown, this embodiment provides a battery thermal management method, including the following steps: S110, Obtain target parameters for thermal management of the power battery. These target parameters include: ambient temperature, charging speed of the power battery, state of charge (SOC) of the power battery, charging rate of the battery cells, heater inlet water flow rate, heater voltage, heater inlet water temperature, and the rate of temperature change of the power battery. Thermal management includes heating and / or cooling. In some examples, the power battery is used to provide a power source for the vehicle, such as a lithium-ion power battery.
[0023] S120 determines the charging conditions for the power battery based on the ambient temperature and the charging speed of the power battery. In some examples, charging conditions where the ambient temperature is lower than a preset ambient temperature and the charging speed is lower than a preset charging speed can be denoted as low-temperature slow charging. The preset ambient temperature and preset charging speed can be set according to actual conditions, and no specific numerical limit is specified here. For example, the preset ambient temperature can be -10℃.
[0024] S130: Determine the power parameters under charging conditions based on the target parameters, and perform thermal management on the power battery according to the power parameters; wherein, the power parameters include at least one of the charger power, maximum allowable charging power, heater heating power, and environmental dissipation power. In some examples, when performing thermal management on the power battery, only heating and / or cooling of the power battery may be performed, or the power battery may be heated first and then cooled, or the power battery may be cooled first and then heated. The specific thermal management method can be selected or set according to the actual situation, and no specific limitation is made on the thermal management method here. In some examples, the method of heating the power battery may be heating. In some examples, the power battery may be heated by a heater (Positive-Temperature-Coefficient, abbreviated as PTC).
[0025] In some exemplary embodiments, the process of determining the charger power under charging conditions based on target parameters and performing thermal management of the power battery according to the charger power includes: calibrating the charger power based on ambient temperature and the state of charge (SOC) of the power battery to obtain the charger power for different ambient temperatures and different SOC values, and associating the charger power for different ambient temperatures and different SOC values to form a charger power table; matching the charger power corresponding to the charging conditions from the charger power table, and heating and / or cooling the power battery according to the matched charger power. In some examples, the charger power can be denoted as P_obc. Since the charger power P_obc is affected by ambient temperature and the state of charge (SOC) of the power battery, and is usually more significantly affected at the beginning and end of charging; for example, when the power battery's SOC is less than 20%, the charger power P_obc shows an increasing curve; when the power battery's SOC is greater than 80%, P_obc shows a decreasing trend, and in the intermediate stage, P_obc is in a stable state. Based on this characteristic, in some examples, the charger power can be calibrated according to the ambient temperature and the state of charge (SOC) of the power battery to obtain the charger power under different charging conditions, such as the charger power under low-temperature slow charging. In some examples, the calibrated charger power table can be as shown in Table 1.
[0026] Table 1 Charger Power Table
[0027] In some exemplary embodiments, the process of determining the maximum allowable charging power under charging conditions based on target parameters and performing thermal management of the power battery according to the maximum allowable charging power includes: calibrating the charging power of each cell in the power battery based on the ambient temperature, the charging rate of the cells in the power battery at different ambient temperatures and different states of charge, obtaining the charging power of each cell at different ambient temperatures and different states of charge, and associating the charging power of all cells at different ambient temperatures and different states of charge to form a table of the maximum allowable charging power of the power battery; matching the maximum allowable charging power corresponding to the charging conditions from the table of the maximum allowable charging power, and heating and / or cooling the power battery according to the matched maximum allowable charging power. In some examples, the maximum allowable charging power can be denoted as P_map. In some examples, assuming the number of battery cells is n, and a certain cell has a charging rate of C(i,j) at a certain temperature and a certain SOC, and the cell's OCV (Open Circuit Voltage, static voltage) is U(i,j), then the charging power of that cell at the charging rate C(i,j) is P(i,j) = n. U(i,j) C(i,j) Q, where Q represents the capacity of the battery cell. Therefore, based on the formula for calculating the charging power of a battery cell, the charging power of all cells in the power battery can be obtained. Then, the charging power of all cells is correlated to form a table of the maximum allowable charging power of the power battery, as shown in Table 2.
[0028] Table 2 Maximum Allowable Charging Power
[0029] During battery charging, the battery temperature rises, and the charging power jumps to the next charging rate depending on the State of Charge (SOC) and ambient temperature. For example, let the battery SOC at 0℃ be denoted as SOC_0℃, and the corresponding maximum allowable charging power P_map be P(i+a, j+b), where a and b are positive integers. If the battery is heated to the next temperature t0, and the battery is charged to SOC_to, the corresponding charging power is P(i+a+m, j+b+n). At this point, the battery heating stops. Due to the lag in battery temperature rise, the battery temperature will continue to rise to t0+Δt, and the corresponding charging power at this point is P_t0+Δt; where P_t0+Δt > P(i+a+m, j+b+n), and Δt is the temperature change of the battery after the heating stops. Therefore, using the maximum allowable charging power for heating or temperature rise management of the battery fully considers the lag in battery temperature rise after the battery thermal management strategy stops.
[0030] In some exemplary embodiments, the process of determining the heater heating power under charging conditions based on target parameters and performing thermal management of the power battery according to the heater heating power includes: calibrating the heater heating power based on the heater inlet water flow rate, heater voltage, and heater inlet water temperature to obtain the heater heating power for different inlet water flow rates, voltages, and temperatures; associating the heater heating power for different inlet water flow rates, voltages, and temperatures to form a heater heating power table; matching the heater heating power corresponding to the charging conditions from the heater heating power table; and heating and / or cooling the power battery according to the matched heater heating power. In some examples, the heater heating power can be denoted as P_batheat. In some examples, the heater voltage can be obtained based on the number of cells in the power battery and the static voltage of the cells in the power battery, for example, the heater voltage is n. U(i,j). As an example, when the heater inlet water flow rate remains constant, but the heater voltage and heater inlet water temperature vary, the heater heating power table can be obtained as shown in Table 3.
[0031] Table 3 Heating Power of Heater
[0032] In some examples, if the passenger compartment heating method in the vehicle is also through a PTC heater, the passenger compartment heating power can be denoted as P_cabin. This P_cabin power can be superimposed with the heater heating power P_batheat, and then thermal management of the power battery can be performed based on the superposition result. After the passenger compartment heating power P_cabin and the heater heating power P_batheat are superimposed, the actual charging SOC of the power battery will decrease, and the charging time will increase. In some examples, when there is no power consumption in the passenger compartment, if P_batheat > P_t0 + Δt, it indicates that the power consumption is higher than the charging power, and the power battery SOC will decrease; conversely, if there is still remaining charging power (P_t0 + Δt - P_batheat > 0), the power battery SOC will increase. In this case, thermal management of the battery can alleviate or solve the problem of the SOC first decreasing and then increasing when the power battery SOC needs to increase during charging, thereby enhancing the user experience.
[0033] In some exemplary embodiments, the process of determining the environmental dissipation power under charging conditions based on target parameters and performing thermal management of the power battery according to the environmental dissipation power includes: calibrating the environmental dissipation power of the power battery based on the ambient temperature and the rate of change of the power battery temperature to obtain the environmental dissipation power of the power battery under different ambient temperatures and different states of charge (SOCs), and associating the environmental dissipation power of different ambient temperatures and different SOCs to form an environmental dissipation power table; matching the environmental dissipation power corresponding to the charging conditions from the environmental dissipation power table, and heating and / or cooling the power battery according to the matched environmental dissipation power. In some examples, the environmental dissipation power can be denoted as P_disp. In some examples, before calibrating the power battery power based on the ambient temperature and the rate of change of the power battery temperature, the rate of change of the power battery temperature V can be obtained first based on the calibrated ambient temperature and the rate of change of the power battery SOC, as shown in Table 4. Then, the environmental dissipation power of the power battery is calibrated based on the ambient temperature and the rate of change of the power battery temperature V to obtain the environmental dissipation power of the power battery under different ambient temperatures and different SOCs, where: P_disp = V c n m In the formula t_ambat, P_disp represents the environmental power dissipation, V represents the rate of temperature change of the power battery, c represents the specific heat capacity of the cell, n represents the number of cells in the power battery, m represents the mass of the cell, and t_ambat represents the time of temperature change of the cell. During calibration, calibration can be performed in 5℃ increments as described in Table 4. For increments less than 5℃, interpolation can be used.
[0034] Table 4. Rate of Temperature Change of Power Battery
[0035] In some exemplary embodiments, the battery thermal management method may further include: at the end of thermal management, if the power battery experiences a temperature rise followed by a temperature drop, the end time of thermal management is recorded as the initial time and the time when the power battery experiences a temperature drop is recorded as the end time; the temperature change value of the power battery is calculated based on the temperature values of the power battery at the initial and end times; the temperature change value of the power battery is calibrated according to different ambient temperatures, and the corresponding calibration results are used as constraints for the next thermal management of the power battery. In some examples, after the power battery is de-heated, the battery temperature change has a lag due to the influence of the battery structure, that is, the battery temperature will still rise after the battery heating is de-heated, and this temperature rise is related to the ambient temperature. The lower the ambient temperature, the smaller the temperature rise after the battery heating is de-heated. Therefore, the battery temperature rise can be determined by calibration testing. For example, the temperature change value Δt obtained by calibration testing can be 2~6℃. The temperature change values of the power battery after de-heating at multiple ambient temperatures during calibration testing are shown in Table 5.
[0036] Table 5 Temperature Change Values
[0037] In some exemplary embodiments, the battery thermal management method may further include: defining the charging conditions of the power battery at a temperature lower than a preset ambient temperature and / or a charging rate lower than a preset charging speed as target charging conditions; calculating the actual charging power under the target charging conditions based on the charger power, maximum allowable charging power, heater heating power, and ambient dissipation power under the target charging conditions; and adjusting the charging time of the power battery based on the actual charging power. In some examples, if the target charging condition is low-temperature slow charging, the actual charging power under low-temperature slow charging can be denoted as P_actcharg, where P_actcharg = min(P_obc, P_map) - (P_cabin + P_batheat + P_disp). Since the actual charging power P_actcharg affects the actual charging time t_actcharg of the power battery, the charging time t_actcharg of the power battery can be adjusted based on the actual charging power P_actcharg.
[0038] In summary, this application proposes a battery thermal management method. This method obtains target parameters for thermal management of the power battery, including ambient temperature, charging speed, state of charge (SOC), cell charging rate, heater inlet water flow rate, heater voltage, heater inlet water temperature, and battery temperature change rate. Thermal management includes heating and / or cooling. Then, based on the ambient temperature and charging speed, the charging conditions for the power battery are determined. Next, power parameters under these charging conditions are determined according to the target parameters, and thermal management is performed on the power battery according to these power parameters. The power parameters include at least one of the following: charger power, maximum allowable charging power, heater heating power, and ambient power dissipation. Therefore, this method can obtain the influence of ambient temperature on the power battery through calibration, making it highly practical. Furthermore, when performing thermal management such as heating and / or cooling, this method not only considers the changes in vehicle power-consuming components with ambient temperature and SOC, but also the temperature lag that occurs after the battery thermal management strategy is terminated, incorporating this lag into subsequent battery thermal management strategies.
[0039] In another exemplary embodiment of this application, such as Figure 2 As shown, this embodiment provides a battery thermal management system, including: The data acquisition module 210 is used to acquire target parameters for thermal management of the power battery. The target parameters include: ambient temperature, charging speed of the power battery, state of charge of the power battery, charging rate of the cells in the power battery, water inlet flow rate of the heater, heater voltage, water inlet temperature of the heater and the rate of temperature change of the power battery. Thermal management includes heating and / or cooling. The charging condition module 220 is used to determine the charging conditions of the power battery based on the ambient temperature and the charging speed of the power battery. The thermal management module 230 is used to determine the power parameters under charging conditions based on the target parameters, and to perform thermal management on the power battery according to the power parameters; wherein, the power parameters include at least one of the charger power, the maximum allowable charging power, the heater heating power, and the ambient dissipation power.
[0040] It is understood that the battery thermal management system provided in the above embodiments and the battery thermal management method provided in the above embodiments belong to the same concept. The specific way in which the battery thermal management method is executed has been described in detail in the above method embodiments, and will not be repeated here. In practical applications, the battery thermal management system provided in the above embodiments can allocate the above functions to different functional modules as needed. That is, the internal structure of the battery thermal management system is divided into different functional modules, and then all or part of the functions of the corresponding functional modules are implemented by the battery thermal management method described in the above embodiments. For example, all or part of the functions of the image acquisition module 210 can be implemented through the relevant execution process of step S110, all or part of the functions of the prediction module 220 can be implemented through the relevant execution process of step S120, and all or part of the functions of the adaptive adjustment module 230 can be implemented through the relevant execution process of step S130. No specific limitations are imposed here.
[0041] In summary, this application proposes a battery thermal management system. A data acquisition module acquires target parameters for thermal management of the power battery. These target parameters include ambient temperature, battery charging speed, battery state of charge (SOC), battery cell charging rate, heater inlet water flow rate, heater voltage, heater inlet water temperature, and battery temperature change rate. Thermal management includes heating and / or cooling. A charging condition module then determines the battery charging conditions based on the ambient temperature and battery charging speed. Finally, a thermal management module determines the power parameters under these charging conditions based on the target parameters and performs thermal management on the power battery according to these power parameters. The power parameters include at least one of the following: charger power, maximum allowable charging power, heater heating power, and ambient power dissipation. Therefore, this system can obtain the impact of ambient temperature on the power battery through calibration, which is highly practical. Moreover, when performing thermal management such as heating and / or cooling of the power battery, this system not only considers the changes of vehicle power consumption components with ambient temperature and state of charge, but also considers the heating lag of the power battery after the battery thermal management strategy is exited, and incorporates the corresponding heating lag into the battery thermal management strategy at subsequent times.
[0042] In another exemplary embodiment of this application, the embodiment also provides a computer device, which may include a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to cause the computer device to perform... Figure 1 The steps of the battery thermal management method described above. Figure 3 A schematic diagram of the structure of a computer device 1000 is shown. (See attached diagram.) Figure 3As shown, the computer device 1000 includes: a processor 1010, a memory 1020, a power supply 1030, a display unit 1040, and an input unit 1060.
[0043] The processor 1010 is the control center of the computer device 1000. It connects various components via interfaces and lines, and executes various functions of the computer device 1000 by running or executing computer programs / instructions stored in the memory 1020, thereby providing overall monitoring of the computer device 1000. In this embodiment, when the processor 1010 calls the computer program stored in the memory 1020, it executes... Figure 1 The steps of the battery thermal management method are described above. Optionally, the processor 1010 may include one or more processing units; preferably, the processor 1010 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. In some embodiments, the processor and memory can be implemented on a single chip; in some embodiments, they can also be implemented separately on independent chips.
[0044] The memory 1020 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, various applications, etc.; the data storage area may store instruction data created based on the use of the computer device 1000, etc. In addition, the memory 1020 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.
[0045] The computer device 1000 also includes a power supply 1030 (such as a battery) that supplies power to various components. The power supply can be logically connected to the processor 1010 through a power management system, thereby enabling the management of charging, discharging, and power consumption.
[0046] The display unit 1040 can be used to display information input by the user or information provided to the user, as well as various menus of the computer device 1000. In this embodiment, it is mainly used to display the display interfaces of various applications in the computer device 1000, as well as text, images, and other objects displayed on the display interfaces. The display unit 1040 may include a display panel 1050. The display panel 1050 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
[0047] The input unit 1060 can be used to receive information such as numbers or characters input by the user. The input unit 1060 may include a touch panel 1070 and other input devices 1080. The touch panel 1070, also known as a touch screen, can collect touch operations on or near the user (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel 1070).
[0048] Specifically, the touch panel 1070 can detect user touch operations and the signals generated by these operations, convert them into touch point coordinates, send them to the processor 1010, and receive and execute commands from the processor 1010. Furthermore, the touch panel 1070 can be implemented using various types of sensors, including resistive, capacitive, infrared, and surface acoustic wave sensors. Other input devices 1080 can include, but are not limited to, one or more of the following: physical keyboard, function keys (such as volume control buttons, power buttons, etc.), trackball, mouse, joystick, etc.
[0049] Of course, the touch panel 1070 can cover the display panel 1050. When the touch panel 1070 detects a touch operation on or near it, it transmits the information to the processor 1010 to determine the type of touch event. Subsequently, the processor 1010 provides corresponding visual output on the display panel 1050 based on the type of touch event. Although in Figure 3 In this embodiment, the touch panel 1070 and the display panel 1050 are two separate components to realize the input and output functions of the computer device 1000. However, in some embodiments, the touch panel 1070 and the display panel 1050 can be integrated to realize the input and output functions of the computer device 1000.
[0050] The computer device 1000 may also include one or more sensors, such as pressure sensors, gravity acceleration sensors, proximity sensors, etc. Of course, depending on the specific application requirements, the computer device 1000 may also include other components such as cameras.
[0051] This application also provides a computer-readable storage medium storing a computer program / instructions. When executed by a processor, the computer program / instructions enable the aforementioned device to perform the functions described in this application. Figure 1 The steps of the battery thermal management method described above.
[0052] It will be understood by those skilled in the art that Figure 3This is merely an example of a computer device and does not constitute a limitation on the device. The device may include more or fewer components than illustrated, or a combination of certain components, or different components. For ease of description, the above sections are divided into modules (or units) according to their functions and described separately. Of course, in implementing this application, the functions of each module (or unit) can be implemented in one or more software or hardware components. For example, as some examples, the aforementioned computer device may be a vehicle, an in-vehicle system, etc.
[0053] Those skilled in the art will understand that this application may 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. This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application, and should be understood to be implementable by computer program instructions for each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams. These computer program instructions may be applied 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 The 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 operate 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 functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable apparatus 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.
[0054] In another exemplary embodiment of this application, this embodiment also provides a vehicle that includes a battery thermal management system as described in the above embodiments, or includes a computer device as described in the above embodiments. Since the specific manner in which the battery thermal management system and the computer device perform their operations has been described in detail in the embodiments, the technical functions and effects of the vehicle provided in this embodiment can be found in the above embodiments, and will not be repeated here.
[0055] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.
Claims
1. A battery thermal management method, characterized in that, The method includes the following steps: Obtain target parameters for thermal management of the power battery, wherein the thermal management includes heating and / or cooling; The charging conditions of the power battery are determined based on the ambient temperature and the charging speed of the power battery. The power parameters under the charging conditions are determined based on the target parameters, and the power battery is thermally managed according to the power parameters.
2. The battery thermal management method according to claim 1, characterized in that, If the target parameters include ambient temperature and the state of charge of the power battery, and the power parameters include charger power, then the process of determining the power parameters under the charging conditions based on the target parameters and performing thermal management of the power battery according to the power parameters includes: The power of the charger is calibrated based on the ambient temperature and the state of charge of the power battery to obtain the charger power at different ambient temperatures and different states of charge, and the charger power at different ambient temperatures and different states of charge is correlated to form a charger power table. The charger power corresponding to the charging conditions is matched from the charger power table, and the power battery is heated and / or cooled according to the matched charger power.
3. The battery thermal management method according to claim 1, characterized in that, If the target parameters include: ambient temperature, state of charge of the power battery, and charging rate of the battery cells, and the power parameters include the maximum allowable charging power, then the process of determining the power parameters under the charging conditions based on the target parameters and performing thermal management of the power battery according to the power parameters includes: Based on the ambient temperature, the charging rate of the cells in the power battery under different ambient temperatures and different states of charge, the charging power of each cell in the power battery is calibrated to obtain the charging power of each cell under different ambient temperatures and different states of charge. The charging power of all cells under different ambient temperatures and different states of charge is correlated to form the maximum allowable charging power table of the power battery. Match the maximum allowable charging power corresponding to the charging conditions from the table of maximum allowable charging power, and heat up and / or cool down the power battery according to the matched maximum allowable charging power.
4. The battery thermal management method according to claim 1, characterized in that, If the target parameters include: heater inlet water flow rate, heater voltage, and heater inlet water temperature, and the power parameters include heater heating power, then the process of determining the power parameters under the charging conditions based on the target parameters and performing thermal management of the power battery according to the power parameters includes: The heater heating power is calibrated based on the heater inlet water flow rate, the heater voltage, and the heater inlet water temperature to obtain the heater heating power for different inlet water flow rates, different voltages, and different inlet water temperatures. The heater heating power for different inlet water flow rates, different voltages, and different inlet water temperatures is then correlated to form a heater heating power table. Match the heater heating power corresponding to the charging conditions from the heater heating power table, and heat up / or cool down the power battery according to the matched heater heating power.
5. The battery thermal management method according to claim 1, characterized in that, If the target parameters include ambient temperature and the rate of change of the power battery temperature, and the power parameters include ambient power dissipation, then the process of determining the power parameters under the charging conditions based on the target parameters and performing thermal management of the power battery according to the power parameters includes: The environmental dissipation power of the power battery is calibrated based on the ambient temperature and the rate of change of the power battery temperature. The environmental dissipation power of the power battery under different ambient temperatures and different states of charge is obtained, and the environmental dissipation power of different ambient temperatures and different states of charge is correlated to form an environmental dissipation power table. Match the environmental dissipation power corresponding to the charging conditions from the environmental dissipation power table, and heat up / or cool down the power battery according to the matched environmental dissipation power.
6. The battery thermal management method according to claim 1, characterized in that, The method further includes: If the power battery first heats up and then cools down at the end of thermal management, the end time of thermal management is recorded as the initial time and the time when the power battery cools down is recorded as the end time. Calculate the temperature change of the power battery based on the temperature values of the power battery at the initial time and the end time; The temperature change values of the power battery are calibrated according to different ambient temperatures, and the corresponding calibration results are used as constraints for the next thermal management of the power battery.
7. The battery thermal management method according to any one of claims 1 to 6, characterized in that, If the power parameters include charger power, maximum allowable charging power, heater heating power, and environmental dissipation power, then the method further includes: The charging conditions of the power battery at a temperature lower than the preset ambient temperature and / or a charging speed lower than the preset charging speed are defined as the target charging conditions. Calculate the actual charging power under the target charging conditions based on the charger power, maximum allowable charging power, heater heating power, and environmental dissipation power. The charging time of the power battery is adjusted based on the actual charging power.
8. A battery thermal management system, characterized in that, The system includes: The data acquisition module is used to acquire target parameters for thermal management of the power battery, wherein the thermal management includes heating and / or cooling. A charging condition module is used to determine the charging conditions of the power battery based on the ambient temperature and the charging speed of the power battery. A thermal management module is used to determine the power parameters under the charging conditions based on the target parameters, and to perform thermal management on the power battery according to the power parameters.
9. A computer device, characterized in that, The device includes a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the battery thermal management method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the steps of the battery thermal management method according to any one of claims 1 to 7.