Charging management method, charging management device and computer program product
By allowing the power battery to sit at a lower SOC for a period of time before charging, the problem of power battery performance attenuation is solved, extending the battery life and improving the user experience.
Patent Information
- Application Number
- CN202510431899.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2025-06-24
AI Technical Summary
There is performance attenuation of power batteries during long-term circulation, including reduced charge and discharge efficiency, reduced releasable capacity and increased internal resistance, which affects the overall performance of power batteries and electric vehicles.
After establishing a charging connection between the vehicle's power battery and the charging device, wait for a certain reflow time to allow the power battery to stand at a lower level of SOC, thereby promoting the infiltration and reflow of the electrolyte.
Effectively slows down the attenuation of power batteries, extends the service life of power batteries, and improves user experience.
Smart Images
Figure CN120191241A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of vehicles, and in particular, to a charging management method, a charging management device, and a computer program product. Background Art
[0002] In recent years, electric vehicles powered by power batteries have developed rapidly under the background of energy transformation. Compared with traditional fuel-powered vehicles, electric vehicles show significant advantages in terms of energy utilization efficiency, environmental friendliness, and operation economy.
[0003] However, it is found in practice that there is a non-negligible phenomenon of performance degradation in the long-term cyclic use of power batteries. With the increase in the number of charge-discharge cycles and the accumulation of use time, the charge-discharge efficiency of the power battery decreases, its available capacity continues to decay, and at the same time, the internal resistance increases. These problems affect the overall performance of the power battery and the electric vehicle, and also affect the user experience. Summary of the Invention
[0004] The purpose of the present application is to provide an improved charging management method, a corresponding computer program product, and a charging management device to overcome at least one of the deficiencies in the prior art.
[0005] According to a first aspect of the present application, there is provided a charging management method for a vehicle, the vehicle including a power battery. The charging management method includes the following steps: an enabling step S10 of enabling a battery health management mode in response to an enabling instruction; and a health management step S20 of waiting for a reflux time after a charging connection is established between the power battery of the vehicle and a charging device in the battery health management mode, the power battery being static during the reflux time and starting to be charged only after the reflux time has elapsed.
[0006] Thus, before charging the power battery of the vehicle, the power battery can be static at a relatively low level of SOC (state of charge) and start charging only after the reflux time has elapsed.
[0007] During the use of the power battery, the electrolyte of its battery cells often has the problem of insufficient electrolyte infiltration. The electrolyte infiltrates and refluxes along the direction from the periphery of the battery cell to the central region. With the use of the power battery, insufficient electrolyte reflux will lead to uneven electrolyte distribution. The liquid retention amount in the central region of the battery cell is less, and the liquid retention amount in the periphery is more. Lithium ions are enriched at the peripheral positions with more liquid retention, resulting in an increase in the lithium intercalation state at the periphery and a lower lithium intercalation state in the central region. In addition, as the electrolyte is consumed, finally black spots are formed in the central region. Over time, the charge-discharge efficiency of the power battery decreases, the capacity decreases, and the internal resistance increases, thus affecting the overall performance of the power battery.
[0008] Generally, before charging, the battery cells of the power battery have a relatively low level of SOC. At this time, the swelling force of the battery cells is small, which is conducive to the infiltration and reflux of the electrolyte. When the SOC is high, the central area of the battery cell bulges, and the swelling force of the battery cell is large, making it more difficult for the central area to be infiltrated by the electrolyte. Therefore, a relatively high level of SOC of the battery cell is more unfavorable for the infiltration and reflux of the electrolyte.
[0009] According to the present application, by using the reflux time, the power battery can be left standing for a period of time at a relatively low level of SOC, enabling the infiltration and reflux of the electrolyte to be more sufficient. Furthermore, the attenuation of the power battery can be effectively slowed down, and the service life of the power battery can be extended.
[0010] In an exemplary embodiment, enabling step S10 includes: identifying an all-night full-charge usage scenario based on the current time, the location of the vehicle, and / or usage habit information, where the all-night full-charge usage scenario represents a usage scenario in which the power battery of the vehicle can be fully charged using the entire night; in the case of identifying the all-night full-charge usage scenario, sending inquiry information to the user of the vehicle asking whether to select the battery health management mode; and in response to receiving the feedback information of the user selecting the battery health management mode, generating an enabling instruction. This helps to avoid conflicts between the long time required for the battery health management mode and the user's vehicle usage needs. Furthermore, the user experience can be improved.
[0011] In an exemplary embodiment, in enabling step S10, the battery health management mode is enabled only when the SOC of the battery cell is lower than a predetermined SOC threshold.
[0012] In an exemplary embodiment, the reflux time is more than half an hour, especially more than 1 hour.
[0013] In an exemplary embodiment, the reflux time is set to 2 hours. Thus, both the problem of performance attenuation of the power battery can be improved, and the user experience can be prevented from being reduced due to excessive time consumption.
[0014] In an exemplary embodiment, in health management step S20, based on the SOC of the battery cell of the power battery at the start of the reflux time, the duration of the reflux time is determined such that the duration of the reflux time is positively correlated with the SOC of the battery cell. Thus, the reflux time can be made more suitable for the infiltration and reflux of the electrolyte. This is both conducive to the full infiltration and reflux of the electrolyte and can avoid wasting time.
[0015] In an exemplary embodiment, in health management step S20, based on the correlation information between the SOC of the battery cell and the infiltration and reflux speed of the electrolyte, the duration of the reflux time is determined according to the SOC of the battery cell of the power battery at the start of the reflux time. This is particularly conducive to the full infiltration and reflux of the electrolyte while avoiding wasting time.
[0016] In an exemplary embodiment, in the health management step S20, according to the temperature of the power battery and / or the ambient temperature, the duration of the reflux time is determined such that the duration of the reflux time is negatively correlated with the temperature of the power battery and / or the ambient temperature. This is also beneficial to fully infiltrate and reflux the electrolyte while avoiding wasting time.
[0017] In an exemplary embodiment, in the health management step S20, during the reflux time, the end time point of the reflux time is determined according to the detected degree of infiltration and reflux of the electrolyte of the power battery. Thereby, the reflux time can be more precisely controlled, so that while ensuring the full infiltration and reflux of the electrolyte, wasting time can be avoided.
[0018] The degree of infiltration and reflux of the electrolyte is optionally detected by measuring the AC impedance spectrum of the battery cell.
[0019] Alternatively or additionally, the degree of infiltration and reflux of the electrolyte can be detected by measuring the DC internal resistance of the battery cell.
[0020] According to a second aspect of the present application, there is provided a computer program product, which includes computer program instructions, wherein when the computer program instructions are executed by one or more processors, the one or more processors are enabled to execute the charging management method according to the present application.
[0021] According to a third aspect of the present application, there is provided a charging management device for a vehicle, wherein the charging management device includes a memory and a processor, the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the processor is enabled to execute the charging management method according to the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Hereinafter, the present application will be described in more detail by referring to the drawings, and the principles, features and advantages of the present application can be better understood. The drawings include:
[0023] Figure 1 Schematically shows a flowchart of a charging management method for a vehicle according to an exemplary embodiment of the present application;
[0024] Figure 2 Schematically shows the change process of SOC over time in the case of the charging management method according to an exemplary embodiment of the present application;
[0025] Figure 3 Schematically shows a flowchart of the enabling step S10 of the charging management method according to an exemplary embodiment of the present application;
[0026] Figure 4Schematically shows a flowchart of enabling step S10 of a charging management method according to an exemplary embodiment of the present application;
[0027] Figure 5 Schematically shows the change curve of the capacity of the cell under test with the number of repetitions; and
[0028] Figure 6 Schematically shows a vehicle according to an exemplary embodiment of the present application.
[0029] List of reference numerals
[0030] 10 Vehicle
[0031] 11 Power battery
[0032] 12 Charging interface
[0033] 13 Charging management device
[0034] 14 Detection device
[0035] 15 Interaction device Detailed implementation manners
[0036] In order to make the technical problems to be solved, technical solutions and beneficial technical effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the protection scope of the present application.
[0037] Figure 1 Schematically shows a flowchart of a charging management method for a vehicle according to an exemplary embodiment of the present application. The vehicle includes a power battery. The vehicle may include, for example, a hybrid vehicle, a pure electric vehicle, etc. The power battery is particularly a lithium-ion battery. In other embodiments, the power battery may also include other types of batteries.
[0038] As Figure 1 shown, the charging management method may include an enabling step S10 and a health management step S20.
[0039] In the enabling step S10, in response to an enabling instruction, the battery health management mode is enabled.
[0040] In the health management step S20, in the battery health management mode, after the power battery of the vehicle establishes a charging connection with the charging device, wait for a reflux time, the power battery is left standing during the reflux time, and the power battery is charged only after the reflux time has elapsed.
[0041] Thus, before charging the power battery of a vehicle, the power battery can be left standing at a relatively low SOC level and only starts charging after a reflux time has elapsed.
[0042] During the use of a power battery, the electrolyte of its battery cells often has the problem of insufficient electrolyte infiltration. The electrolyte infiltrates and refluxes in the direction from the periphery to the central region of the battery cell. As the power battery is used, insufficient electrolyte reflux will lead to uneven electrolyte distribution. The liquid retention amount in the central region of the battery cell is less, while that in the periphery is more. Lithium ions accumulate in the peripheral positions with more liquid retention, resulting in an increase in the lithium-inserted state in the periphery and a lower lithium-inserted state in the central region. In addition, as the electrolyte is consumed, black spots are eventually formed in the central region. Over time, the charge-discharge efficiency of the power battery decreases, the capacity reduces, and the internal resistance increases, thus affecting the overall performance of the power battery.
[0043] Generally, before charging, the battery cells of a power battery have a relatively low SOC. At this time, the swelling force of the battery cells is small, which is conducive to the infiltration and reflux of the electrolyte. When the SOC is high, the central region of the battery cell bulges, and the swelling force of the battery cell is large, making it more difficult for the central region to be infiltrated by the electrolyte. Therefore, a relatively high SOC of the battery cell is more unfavorable for the infiltration and reflux of the electrolyte.
[0044] It should be understood that "establishing a charging connection" does not mean starting to charge, but rather that the associated state (relative position association, electrical connection, and / or electromagnetic association, etc.) between the power battery and the charging device is in a state where the charging device can charge the power battery. The charging connection can include a wired charging connection or a wireless charging connection. For example, after the charging gun of a charging pile is plugged into the charging interface of a vehicle, a charging connection can be established between the power battery of the vehicle and the charging pile.
[0045] According to the present application, by using the reflux time, the power battery can be left standing at a relatively low SOC level for a period of time, enabling the infiltration and reflux of the electrolyte to be more sufficient. Furthermore, the attenuation of the power battery can be effectively slowed down, and the service life of the power battery can be extended.
[0046] In Figure 2In this figure, the change process of the SOC over time in the case of the charging management method according to an exemplary embodiment of the present application is schematically shown by a solid line. At time point t0, a charging connection is established between the power battery of the vehicle and the charging device, but charging has not started yet. For example, time point t0 may represent the time point when the charging gun is plugged into the charging interface of the vehicle and the charging pile is successfully paired with the vehicle. The time period from time point t0 to time point t1 is the reflux time. During the period from time point t0 to time point t1, the power battery is in a static state. Therefore, the SOC does not increase over time. Due to the self-discharge of the power battery, the SOC may slightly decrease. During the reflux time, the SOC is at a low level, which helps the electrolyte of the battery cell to infiltrate and reflux. At time point t1, the reflux time ends, and the charging device starts to charge the power battery. Accordingly, the SOC increases. This charging process may stop when the power battery is fully charged or charged to a desired SOC level.
[0047] In contrast, Figure 2 The change process of the SOC over time during a conventional charging process is also schematically shown by a dashed line. During the conventional charging process, at time point t0, a charging connection is established between the power battery of the vehicle and the charging device, and charging starts immediately. Accordingly, the SOC increases. This charging process may stop when the power battery is fully charged or charged to a desired SOC level. Then, the SOC remains at a high level.
[0048] It can be seen from the comparison that by implementing the charging management method according to an exemplary embodiment of the present application, the power battery can maintain a low SOC level for a long time, which helps the electrolyte to be fully infiltrated and refluxed.
[0049] Figure 3 The flowchart of enabling step S10 of the charging management method according to an exemplary embodiment of the present application is schematically shown.
[0050] As Figure 3 shown, enabling step S10 may include steps S311, S312, and S313.
[0051] In step S311, an all-night full-charge usage scenario may be identified based on the current time, the location of the vehicle, and / or usage habit information, where the all-night full-charge usage scenario represents a usage scenario in which the power battery of the vehicle can be fully charged using the entire night time. The usage habit information is used to represent the usage habits of the user of the vehicle regarding the vehicle (for example, including driving habits and charging habits). The usage habit information can be obtained from the historical usage data of the vehicle, for example.
[0052] In step S312, in the case where the all-night full-charge usage scenario is identified, inquiry information asking whether to select the battery health management mode is sent to the user of the vehicle.
[0053] In step S313, in response to receiving feedback information from the user selecting the battery health management mode, an enabling instruction is generated.
[0054] For example, by means of an interaction device of the vehicle, inquiry information on whether to select the battery health management mode can be sent to the user of the vehicle. In addition, by means of the interaction device, feedback information from the user can be received. The interaction device may include a display screen, a voice device, and / or a key of the vehicle, etc.
[0055] As Figure 3 shown, the enabling step S10 may further include step S314. If the user gives a negative feedback to the inquiry information on whether to select the battery health management mode, step S314 can be executed. In step S314, after establishing a charging connection between the power battery and the charging device, the power battery can be charged immediately without waiting for a reflux time.
[0056] According to an exemplary embodiment of the present application, in the enabling step S10, the battery health management mode is enabled only when the cell SOC is lower than a predetermined SOC threshold.
[0057] For example, only when the cell SOC is lower than a predetermined SOC threshold will inquiry information on whether to select the battery health management mode be sent to the user of the vehicle. Otherwise, even if an all-night full charge usage scenario is recognized, there is no need to send inquiry information on whether to select the battery health management mode to the user.
[0058] Figure 4 The flowchart of the enabling step S10 of the charging management method according to an exemplary embodiment of the present application is schematically shown.
[0059] As Figure 4 shown, the enabling step S10 may include steps S411, S412, S413, S414, and S415.
[0060] In step S411, an all-night full charge usage scenario can be recognized according to the current time, the location of the vehicle, and / or usage habit information, and the all-night full charge usage scenario means a usage scenario in which the power battery of the vehicle can be fully charged using the whole night time.
[0061] In step S412, when the all-night full charge usage scenario is recognized, the cell SOC is obtained, and it is judged whether the cell SOC is lower than a predetermined SOC threshold. Only when the cell SOC is lower than the predetermined SOC threshold, step S413 is executed. If the cell SOC is higher than the predetermined SOC threshold, step S415 can be executed. As an example, the SOC threshold can be set to 50%. In another embodiment, the SOC threshold can also be set to a higher or lower value, such as 40% or 60%, etc.
[0062] In step S413, when the all-night full-charge usage scenario is recognized, inquiry information on whether to select the battery health management mode is sent to the user of the vehicle.
[0063] In step S414, in response to receiving feedback information from the user to select the battery health management mode, an enabling instruction is generated.
[0064] If the user gives a negative feedback on the inquiry information on whether to select the battery health management mode, step S415 can be executed.
[0065] In step S415, after establishing the charging connection between the power battery and the charging device, the power battery can be charged immediately without waiting for the reflux time.
[0066] According to an exemplary embodiment of the present application, the reflux time is more than half an hour, especially more than 1 hour.
[0067] In an exemplary embodiment of the present application, the reflux time can be preset to 2 hours.
[0068] The reflux time can be preset based on tests. The tests for determining a reasonable reflux time are described below by way of example. The tested battery cells are PB480 battery cells.
[0069] In the first test step, four groups of tested battery cells are left to stand in an environment (such as an incubator) at 25°C until the surface temperature of the battery cells is 25 ± 2°C. Each group of tested battery cells can include, for example, 2 battery cells.
[0070] In the second test step, the tested battery cells are charged at a constant current of 1C until the voltage of the battery cells reaches 3.65V.
[0071] In the third test step, the battery cells are charged at a constant voltage until the cut-off current is less than 0.05C.
[0072] In the fourth test step, the tested battery cells are left to stand for 30 minutes.
[0073] In the fifth test step, the battery cells are discharged at 1C until the cut-off voltage reaches 2.2V.
[0074] In the sixth test step, the four groups of tested battery cells are respectively left to stand for the corresponding reflux time, as shown in the following table.
[0075] Cell group Reflux time / h 1 0.5 2 1 3 2 4 4
[0076] The test steps two to six are repeatedly executed, and the number of repetitions is recorded. Moreover, the degree of capacity attenuation of the battery cells is detected.
[0077] Figure 5 Schematically shown is the change curve of the capacity of the tested battery cell with the number of repetitions. In Figure 5 it, the abscissa represents the number of repetitions T, and the ordinate represents the capacity C of the battery cell.
[0078] It can be seen that the capacities of the four groups of tested battery cells all decay as the number of repetitions increases. The first group of tested battery cells has a reflux time of 0.5 h, and its capacity decays most severely. Compared with the first group of tested battery cells, the second group of tested battery cells has a longer reflux time of 1 h, and the problem of its capacity decay is improved. The third group of tested battery cells has an even longer reflux time of 2 h, and the degree of its capacity decay is further reduced. The fourth group of tested battery cells has a reflux time of 4 h, and the degree of its capacity decay is slightly reduced compared with the third group of tested battery cells.
[0079] As the reflux time increases, the problem of capacity decay is gradually improved. However, when the reflux time reaches more than 2 h, the increase in the reflux time has no significant effect on further reducing the degree of capacity decay. The capacity decay of the third group of tested battery cells with a reflux time of 2 h is not much different from that of the fourth group of tested battery cells with a reflux time of 4 h. Considering the balance between the time required and the benefits, the reflux time can be set to 2 hours. Thus, not only can the problem of performance decay of the power battery be improved, but also the user experience can be prevented from being reduced due to spending too much time.
[0080] According to an exemplary embodiment of the present application, in the health management step S20, the duration of the reflux time can be determined according to the SOC of the battery cell at the start of the reflux time of the power battery, so that the duration of the reflux time is positively correlated with the SOC of the battery cell.
[0081] In other words, before charging, the lower the SOC of the battery cell, the shorter the reflux time can be set. Because a lower SOC of the battery cell is beneficial to the infiltration reflux of the electrolyte, therefore, when the SOC of the battery cell is low, the electrolyte can infiltrate and reflux relatively quickly, and the reflux time required for the battery cell is short. In this case, too long a reflux time will result in spending too much time and a very small increase in benefits. On the contrary, if the SOC of the battery cell is relatively high before charging, the reflux time can be set longer to allow the electrolyte to infiltrate and reflux sufficiently.
[0082] Thus, the reflux time can be made more suitable for the infiltration reflux of the electrolyte. This is both beneficial to the sufficient infiltration reflux of the electrolyte and can avoid wasting time.
[0083] Optionally, the relationship between the SOC of the battery cell and the infiltration reflux speed of the electrolyte can be pre-calibrated through testing. Thus, the correlation information between the SOC of the battery cell and the infiltration reflux speed of the electrolyte can be obtained and stored.
[0084] In the health management step S20, based on the correlation information between the cell SOC and the electrolyte infiltration and reflux speed, the duration of the reflux time can be determined according to the cell SOC of the power battery at the start of the reflux time.
[0085] This is particularly beneficial for enabling the electrolyte to fully infiltrate and reflux while avoiding wasting time.
[0086] According to an exemplary embodiment of the present application, in the health management step S20, the duration of the reflux time can be determined according to the temperature of the power battery and / or the ambient temperature, such that the duration of the reflux time is negatively correlated with the temperature of the power battery and / or the ambient temperature.
[0087] The temperature of the power battery and / or the ambient temperature can be measured at the start of the reflux time.
[0088] A higher temperature helps the infiltration and reflux of the electrolyte. Therefore, when the temperature of the power battery and / or the ambient temperature is relatively high, the reflux time can be set shorter. Conversely, when the temperature of the power battery and / or the ambient temperature is relatively low, the reflux time can be set longer. This is also beneficial for enabling the electrolyte to fully infiltrate and reflux while avoiding wasting time.
[0089] According to an exemplary embodiment of the present application, the inquiry information sent to the user about whether to select the battery health management mode may include information about the duration of the reflux time.
[0090] The information about the duration of the reflux time can, for example, be directly expressed as the required duration of the reflux time, and / or as the expected charging end time considering the duration of the reflux time.
[0091] This helps the user determine whether to select the battery health management mode after weighing the vehicle usage requirements.
[0092] According to an exemplary embodiment of the present application, in the health management step S20, during the reflux time, the end time point of the reflux time can be determined according to the detected degree of electrolyte infiltration and reflux of the power battery. Thus, the reflux time can be more precisely controlled, so that while ensuring the full infiltration and reflux of the electrolyte, wasting time can be avoided.
[0093] In an exemplary embodiment, the degree of electrolyte infiltration and reflux can be detected by measuring the alternating current impedance spectrum of the cell.
[0094] For example, by analyzing the impedance spectrum, the ohmic impedance Rs of the cell can be determined. When the electrolyte is fully infiltrated and refluxed, the ohmic impedance of the cell is relatively low. As an example, the time point when the ohmic impedance is reduced to below the desired threshold can be set as the end time point of the reflux time.
[0095] Alternatively or additionally, by analyzing the intermediate frequency region of the impedance spectrum, the charge transfer resistance Rct of the battery cell can be determined. When the electrolyte is fully infiltrated and refluxed, the charge transfer resistance of the battery cell is relatively low. As an example, the reflux time can be ended after the charge transfer resistance is reduced to a desired level.
[0096] In one exemplary embodiment, the degree of electrolyte infiltration and reflux can be detected by measuring the DC internal resistance of the battery cell.
[0097] When the electrolyte is not fully infiltrated and refluxed, the resistance to ion migration is large, resulting in a large DC internal resistance; conversely, when the electrolyte is fully infiltrated and refluxed, the ion channels in the battery cell are unobstructed and the internal resistance is small. As an example, the reflux time can be ended after the DC internal resistance is reduced to a desired level.
[0098] Figure 6 A vehicle 10 according to an exemplary embodiment of the present application is schematically shown.
[0099] The vehicle 10 includes a power battery 11. The power battery 11 may in particular be a lithium-ion battery.
[0100] The vehicle 10 further includes a charging interface 12 for charging the power battery 11. The charging gun of a charging pile can be plugged into the charging interface 12 to charge the power battery 11.
[0101] As Figure 6 shown, the vehicle 10 may include a charging management device 13. The charging management device 13 can be configured to be capable of executing a charging management method according to an exemplary embodiment of the present application. It should be understood that the features and advantages described herein for the charging management method also apply to the charging management device 13, and vice versa.
[0102] The charging management device 13 is implemented as or integrated into, for example, an electronic control unit (ECU) of the vehicle 10. Optionally, the charging management device 13 can be implemented as a control unit dedicated to controlling the charging operation of the power battery 11.
[0103] The charging management device 13 of the vehicle 10 may include a memory and a processor. The memory stores computer program instructions. When the computer program instructions are executed by the processor, the processor can, for example, execute a charging management method for the vehicle 10.
[0104] Optionally, the association information between the SOC of the battery cell and the electrolyte infiltration and reflux speed can be stored in the memory of the charging management device 13.
[0105] The computer program product can be stored in a computer-readable storage medium. The computer-readable storage medium may include, for example, high-speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card, a secure digital card, a flash memory card, at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices. The processor may be a central processing unit, or may also be other general-purpose processors, digital signal processors, application-specific integrated circuits, off-the-shelf programmable gate arrays, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
[0106] Vehicle 10 further includes at least one detection device 14. The detection device 14 can be configured to detect the states of various components of vehicle 10 and / or the state of the external environment, etc.
[0107] The detection device 14 may include, for example, a positioning device for identifying the location where vehicle 10 is located, a temperature sensor for detecting the environmental temperature, a temperature sensor for detecting the temperature of the power battery 11, a sensor for detecting the SOC of the battery cells, a sensor for detecting the impedance spectrum of the battery cells, and / or a sensor for detecting the DC internal resistance of the battery cells, etc.
[0108] Vehicle 10 further includes an interaction device 15. By means of the interaction device 15, information can be sent to the user of vehicle 10, such as an inquiry message on whether to select the battery health management mode. In addition, by means of the interaction device 15, the operation information of the user can be received, such as the feedback information for the aforementioned inquiry message. The interaction device 15 may include, for example, the display screen of vehicle 10, a voice device, and / or keys, etc.
[0109] Although specific embodiments of the present application are described in detail herein, they are given for purposes of explanation only and should not be considered as limiting the scope of the present application. Various substitutions, changes, and modifications can be conceived without departing from the spirit and scope of the present application.
Claims
1. A charging management method for a vehicle, the vehicle comprising a power battery, wherein: The charging management method comprises the following steps: An enabling step S10, in response to the enabling instruction, enabling the battery health management mode; as well as Health management step S20, in the battery health management mode, after the power battery of the vehicle establishes a charging connection with the charging device, a reflow time is waited for, during which the power battery is left stationary, and the power battery is charged only after the reflow time has passed.
2. The charging management method according to claim 1, wherein: The enabling step S10 includes: Identify an overnight full charge usage scenario based on the current time, the location of the vehicle and / or usage habit information, wherein the overnight full charge usage scenario indicates a usage scenario in which the power battery of the vehicle can be fully charged overnight; When an overnight full-charge usage scenario is identified, a query message is sent to the vehicle user as to whether to select a battery health management mode; and In response to receiving feedback information from a user selecting a battery health management mode, an enabling instruction is generated.
3. The charging management method according to claim 1 or 2, wherein: In the enabling step S10 , the battery health management mode is enabled only when the battery cell SOC is lower than a predetermined SOC threshold.
4. The charging management method according to any one of claims 1 to 3, wherein: The reflux time is more than half an hour, especially more than 1 hour; or The reflux time was set to 2 hours.
5. The charging management method according to any one of claims 1 to 4, wherein: In the health management step S20, the duration of the reflow time is determined according to the cell SOC of the power battery at the beginning of the reflow time, so that the duration of the reflow time is positively correlated with the cell SOC.
6. The charging management method according to any one of claims 1 to 5, wherein: In the health management step S20, based on the correlation information between the cell SOC and the electrolyte infiltration reflux speed, the duration of the reflux time is determined according to the cell SOC of the power battery at the beginning of the reflux time.
7. The charging management method according to any one of claims 1 to 6, wherein: In the health management step S20 , the duration of the reflow time is determined according to the temperature of the power battery and / or the ambient temperature, so that the duration of the reflow time is negatively correlated with the temperature of the power battery and / or the ambient temperature.
8. The charging management method according to any one of claims 1 to 4, wherein: In the health management step S20, during the reflux time, the end time point of the reflux time is determined according to the detected electrolyte infiltration reflux degree of the power battery, wherein: The electrolyte infiltration reflux degree can be optionally detected by measuring the AC impedance spectrum of the battery cell; and / or The degree of electrolyte wetting and reflux can optionally be detected by measuring the DC internal resistance of the battery cell.
9. A computer program product comprising computer program instructions, wherein: The computer program instructions, when executed by one or more processors, enable the one or more processors to perform the charging management method according to any one of claims 1-8.
10. A charging management device for a vehicle, wherein: The charging management device comprises a memory and a processor, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the processor is capable of executing the charging management method according to any one of claims 1-8.