Charging control method, device, equipment, vehicle, storage medium and program product

Abstract

The invention relates to a charging control method, device and equipment, a vehicle, a storage medium and a program product. The method comprises the following steps: acquiring a current running state parameter of the power battery, determining a standard charging voltage of the power battery under the running state parameter, and then adjusting an actual charging voltage of the power battery by taking the standard charging voltage as a target. According to the scheme provided by the invention, the actual charging voltage of the power battery can be controlled to be always close to the standard charging voltage corresponding to the current running state, so that the current can be adaptively reduced under the condition that the internal resistance is increased, the overcharge phenomenon is avoided, the aging process of the battery is slowed down, and the thermal runaway risk is reduced.

Description

Technical Field

[0001] The present application relates to the field of charging control technology, and in particular to a charging control method, apparatus, device, vehicle, storage medium, and program product. Background Art

[0002] As a core component of electric vehicles, the performance of power batteries directly determines their overall performance. In related technologies, batteries gradually age over time, accompanied by a continuous increase in internal resistance. This degradation process can easily lead to overcharging, which accelerates the aging process and significantly increases the risk of thermal runaway. Summary of the Invention

[0003] In order to solve or partially solve the problems existing in the related art, the present application provides a charging control method, device, equipment, vehicle, storage medium and program product, which can solve the technical problem in the related art that the battery gradually ages and the internal resistance continues to increase, causing overcharging.

[0004] A first aspect of the present application provides a charging control method, comprising: Acquiring current operating state parameters of the power battery and determining a standard charging voltage of the power battery under the operating state parameters; The actual charging voltage of the power battery is adjusted with the standard charging voltage as a target.

[0005] Furthermore, in the above method, adjusting the actual charging voltage of the power battery with the standard charging voltage as a target includes: By adjusting the actual charging current of the power battery, the actual charging voltage of the power battery is made to converge toward the standard charging voltage.

[0006] Furthermore, in the above method, adjusting the actual charging current of the power battery includes: determining a current variation according to the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs; wherein the same interval corresponds to a fixed current variation, and a larger difference within different intervals corresponds to a larger current variation; A target charging current is determined according to the current variation, and the actual charging current of the power battery is adjusted based on the target charging current.

[0007] Furthermore, in the above method, determining the current variation according to the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs includes: Determine a correction coefficient based on the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs; wherein the same interval corresponds to a fixed correction coefficient, and the larger the difference in different intervals, the larger the corresponding correction coefficient; The product of the upper limit charging current of the power battery and the correction coefficient is calculated as the current change.

[0008] Furthermore, in the above method, determining the target charging current according to the current change includes: determining an adjustment current according to the actual charging current and the current variation; From the adjustment current and the upper limit charging current of the power battery, a smaller current value is selected as the target charging current.

[0009] Furthermore, in the above method, adjusting the actual charging current of the power battery includes: Determining the current adjustment speed according to the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs; wherein the same interval corresponds to a fixed current adjustment speed, and the larger the difference in different intervals, the larger the corresponding current adjustment speed; The actual charging current of the power battery is adjusted according to the current adjustment speed.

[0010] Furthermore, the above method further includes: Detect the actual charge level of the power battery at set time intervals; If the actual charge capacity of the power battery does not reach the set charge capacity, the step of obtaining the current operating status parameter of the power battery is executed; if the actual charge capacity of the power battery reaches the set charge capacity, the power battery is charged with a full charge cut-off current constant current to an upper limit charging voltage of the power battery.

[0011] Furthermore, in the above method, the actual charging voltage of the power battery includes the voltage corresponding to the cell with the highest voltage in the power battery.

[0012] A second aspect of the present application provides a charging control device, comprising: an acquisition module, configured to acquire current operating state parameters of the power battery and determine a standard charging voltage of the power battery under the operating state parameters; The adjustment module is used to adjust the actual charging voltage of the power battery with the standard charging voltage as a target.

[0013] A third aspect of the present application provides a charging control device, including: processor; and The memory stores executable codes thereon, and when the executable codes are executed by the processor, the processor is caused to execute the method described above.

[0014] A fourth aspect of the present application provides a vehicle, comprising: charging control equipment; The charging control device is configured to be able to execute the method described above.

[0015] A fifth aspect of the present application provides a computer-readable storage medium having executable code stored thereon. When the executable code is executed by a processor of an electronic device, the processor is caused to execute the method described above.

[0016] A sixth aspect of the present application provides a computer program product, which includes computer instructions, and when the computer instructions are executed by a processor, implements the method described above.

[0017] The technical solution provided by this application may include the following beneficial results: The technical solution of this application can obtain the current operating state parameters of the power battery, determine the standard charging voltage of the power battery under these operating state parameters, and then adjust the actual charging voltage of the power battery based on the standard charging voltage. This arrangement can control the actual charging voltage of the power battery to always be close to the standard charging voltage corresponding to the current operating state. When the internal resistance increases, the current can be adaptively reduced, avoiding overcharging, slowing the battery aging process, and reducing the risk of thermal runaway.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0020] Figure 1 Schematic diagram of an application scenario of the charging control method shown in an embodiment of the present application; Figure 2 1 is a flow chart of a charging control method according to an embodiment of the present application; Figure 3 is another flow chart of the charging control method shown in an embodiment of the present application; Figure 4 1 is a schematic structural diagram of a charging control device according to an embodiment of the present application; Figure 5is a structural diagram of a charging control device shown in an embodiment of the present application; Figure 6 It is a schematic structural diagram of a vehicle shown in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0022] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0023] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] With the rapid development of new energy vehicles, power batteries, as core components of electric vehicles, have always been a pain point for users in terms of charging time and cycle life. In related technologies, as battery usage increases, they gradually age and their internal resistance continues to increase. This degradation process can easily lead to overcharging, which in turn accelerates the aging process and significantly increases the risk of thermal runaway. Furthermore, in low-temperature environments, the internal resistance of the battery also increases significantly. In addition to causing overcharging, simply controlling the charging cut-off voltage or charging current cannot fully charge the battery, resulting in a decrease in driving range.

[0025] In response to the above problems, an embodiment of the present application provides a charging control method. Since the actual charging voltage of the power battery can be controlled to always be close to the standard charging voltage corresponding to the current operating state, when the internal resistance increases, the current can be adaptively reduced to avoid overcharging, slow down the battery aging process, and reduce the risk of thermal runaway.

[0026] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] Figure 1 A feasible application scenario of the charging control method is shown. Figure 1 In the scene shown, a vehicle is provided.

[0028] The above-mentioned vehicles refer to new energy vehicles that use power batteries as power sources.

[0029] The vehicle is equipped with a charging control device, which is used to obtain the current operating status parameters of the power battery and determine the standard charging voltage of the power battery under the operating status parameters. The actual charging voltage of the power battery is adjusted based on the standard charging voltage.

[0030] The charging control device can be installed in the vehicle's center console or anywhere else, such as the vehicle's engine compartment. It can be an electronic device embedded in the vehicle's Electronic Control Unit (ECU), a processing chip independent of the ECU, or one or more ECUs specifically designed to control the charging process.

[0031] This setting can control the actual charging voltage of the power battery to always be close to the standard charging voltage corresponding to the current operating state. When the internal resistance increases, the current can be adaptively reduced to avoid overcharging, slow down the battery aging process, and reduce the risk of thermal runaway.

[0032] Figure 2 Schematic diagram of the charging control method according to the embodiment of the present application. Figure 2 , the method comprising: S101: Acquire current operating state parameters of a power battery, and determine a standard charging voltage of the power battery under the operating state parameters.

[0033] The above-mentioned power battery refers to a battery pack whose charging process needs to be controlled according to the charging control method of this embodiment, and can be composed of one or more battery cells. In the embodiments of this application, the type of power battery is not limited, and the power battery can be a lithium battery, lead-acid battery, lithium iron phosphate battery, lithium manganese iron phosphate battery, etc.

[0034] The aforementioned operating state parameters refer to parameters that can characterize the operating state of the power battery during operation. More specifically, in some embodiments, the operating state parameters may include battery temperature and state of charge (SOC).

[0035] In an embodiment of the present application, the operating state parameters of the power battery at the current moment are obtained to determine the standard charging voltage of the power battery under the operating state parameters. For example, the battery temperature and SOC of the power battery at the current moment can be obtained to determine the standard charging voltage of the power battery under the battery temperature and SOC.

[0036] The standard charging voltage corresponding to a certain operating state parameter refers to the charging voltage that can prevent overcharging while ensuring charging efficiency under the operating state parameter. In other words, under the operating state parameter, charging at this standard charging voltage can ensure charging efficiency while preventing overcharging.

[0037] In some embodiments, based on parameters such as the model and specifications of the power battery, the standard charging voltage of the power battery under different operating state parameters is pre-tested to obtain a standard charging voltage curve of the power battery under different operating state parameters.

[0038] After obtaining the current operating state parameters of the power battery, the standard charging voltage of the power battery under the current operating state parameters can be obtained by querying the standard charging voltage curve of the power battery under different operating state parameters.

[0039] S102: Adjust the actual charging voltage of the power battery with the standard charging voltage as the target.

[0040] The actual charging voltage of a power battery refers to the voltage of the power battery during the actual charging process. A power battery typically includes multiple cells. The actual charging voltage of the power battery can be the average voltage of all cells in the power battery, or the voltage corresponding to the cell with the highest voltage in the power battery. This is not limited in this embodiment.

[0041] In the embodiments of the present application, the actual charging voltage of the power battery is adjusted with the standard charging voltage as the target. That is, by adjusting the actual charging voltage of the power battery, the actual charging voltage can be brought closer to the standard charging voltage. For example, if the actual charging voltage is greater than the standard charging voltage, the actual charging voltage needs to be reduced to bring the actual charging voltage closer to the standard charging voltage; if the actual charging voltage is less than the standard charging voltage, the actual charging voltage needs to be increased to bring the actual charging voltage closer to the standard charging voltage; if the actual charging voltage is equal to the standard charging voltage, the actual charging voltage does not need to be adjusted.

[0042] It should be noted that in this embodiment, if the difference between the actual charging voltage and the standard charging voltage is small and less than or equal to the set threshold, it means that the actual charging voltage is equal to the standard charging voltage; if the difference between the actual charging voltage and the standard charging voltage is large and greater than the set threshold, and the actual charging voltage is greater than the standard charging voltage, it means that the actual charging voltage is greater than the standard charging voltage; if the difference between the actual charging voltage and the standard charging voltage is large and greater than the set threshold, and the actual charging voltage is less than the standard charging voltage, it means that the actual charging voltage is less than the standard charging voltage. The above-mentioned set thresholds can be set according to actual conditions and are not limited in this embodiment.

[0043] Specifically, the actual charging current of the power battery can be adjusted so that the actual charging voltage can be close to the standard charging voltage; the output voltage of the charging equipment such as the charging pile can also be increased so that the actual charging voltage can be close to the standard charging voltage, which is not limited in this embodiment.

[0044] It should be noted that, in some embodiments, in order to avoid overcharging of cells in the power battery, the voltage corresponding to the cell with the highest voltage in the power battery is selected as the actual charging voltage of the power battery.

[0045] The internal resistance of the power battery will increase when it ages or is in a low-temperature environment. The difference is that the increase in internal resistance caused by battery aging is irreversible, while the increase in internal resistance caused by a low-temperature environment is reversible. In the case of increased internal resistance, the constant current charging method in the prior art will cause the voltage to increase significantly, creating the risk of overcharging. In the embodiments of the present application, on the one hand, the actual charging voltage of the power battery can be controlled to always be close to the standard charging voltage corresponding to the current operating state. Since the voltage is fixed, when the internal resistance increases, the current can be adaptively reduced to avoid overcharging, thereby slowing down the battery aging process and reducing the risk of thermal runaway. On the other hand, keeping the actual charging voltage close to the standard charging voltage corresponding to the current operating state can also ensure charging efficiency while avoiding overcharging. At the same time, the current adaptability is reduced in a low-temperature environment, which can fully charge the battery and avoid mileage degradation.

[0046] Moreover, the above embodiment obtains the standard charging voltage at different temperatures and SOCs, and dynamically adjusts the charging current according to the highest voltage in all battery cells, thereby achieving dynamic changes in real-time voltage and real-time current during the charging process, maximizing the charging capacity of the battery cells and improving charging efficiency. This charging control strategy has good flexibility and versatility. It can not only optimize the charging problems of the current lithium iron phosphate battery system, but is also applicable to the lithium manganese iron phosphate battery system. It can effectively solve the problems of poor battery consistency, short board effect and battery overcharging when the number of battery strings is large, and extend the battery life.

[0047] As an optional embodiment, the steps of the above embodiment are based on the standard charging voltage and adjust the actual charging voltage of the power battery, specifically including the following steps: By adjusting the actual charging current of the power battery, the actual charging voltage of the power battery is made to converge towards the standard charging voltage.

[0048] In the embodiment of the present application, the actual charging voltage of the power battery is adjusted by adjusting the actual charging current of the power battery, so that the actual charging voltage of the power battery converges toward the standard charging voltage, that is, the actual charging voltage of the power battery approaches the standard charging voltage.

[0049] For example, if the actual charging voltage is greater than the standard charging voltage, the actual charging current needs to be reduced so that the actual charging voltage can approach the standard charging voltage; if the actual charging voltage is lower than the standard charging voltage, the actual charging current needs to be increased so that the actual charging voltage can approach the standard charging voltage; if the actual charging voltage is equal to the standard charging voltage, the actual charging current does not need to be adjusted.

[0050] It should be noted that although the actual charging current needs to be increased when the actual charging voltage is lower than the standard charging voltage, since the actual charging voltage is relatively small at this time, the actual charging voltage needs to be increased to ensure charging efficiency and avoid overcharging.

[0051] In the above embodiment, the actual charging current can be dynamically adjusted so that the actual charging voltage of the power battery converges toward the standard charging voltage, thereby ensuring charging efficiency while avoiding the risk of overcharging.

[0052] As an optional embodiment, the steps of the above embodiment to adjust the actual charging current of the power battery specifically include the following steps: The current variation is determined based on the interval to which the difference between the actual charging voltage and the standard charging voltage of the power battery belongs. A fixed current variation corresponds to the same interval, and the larger the difference within different intervals, the larger the corresponding current variation. The target charging current is determined based on the current variation, and the actual charging current of the power battery is adjusted based on the target charging current.

[0053] The upper limit charging current of a power battery refers to the maximum instantaneous current value allowed to be input to the battery while ensuring battery safety and lifespan. The upper limit charging current of a power battery of this model can be obtained through pre-testing based on parameters such as the model and specifications of the power battery, and is not limited in this embodiment.

[0054] The difference interval between the actual charging voltage and the standard charging voltage, as well as the current variation corresponding to each interval, can be pre-set. An interval can include only one value or a range of values, which is not limited in this embodiment. The same interval corresponds to a fixed current variation; different intervals correspond to different current variations, and the greater the difference within different intervals, the greater the corresponding current variation. The number of intervals can be set according to actual conditions and is not limited in this embodiment. This allows the current variation to be determined based on the interval to which the difference between the actual charging voltage and the standard charging voltage of the power battery belongs.

[0055] A functional relationship ΔI=f1(ΔV) can also be pre-set between the difference range between the actual charging voltage and the standard charging voltage, and the current change. ΔI represents the current change, and ΔV represents the difference range between the actual charging voltage and the standard charging voltage. An interval can include only a single value or a range of values, which is not limited in this embodiment. The functional relationship is as follows: the same interval corresponds to a fixed current change; different intervals correspond to different current changes, and the larger the difference within the interval, the larger the corresponding current change. This facilitates determining the current change based on the interval to which the difference between the actual charging voltage and the standard charging voltage falls.

[0056] It should be noted that different intervals correspond to different current changes, and the larger the difference between the intervals, the larger the corresponding current change. The purpose is to quickly bring the actual charging voltage closer to the standard charging voltage with a larger current change when the difference between the actual charging voltage and the standard charging voltage is large. If the actual charging voltage is lower than the standard charging voltage at this time, charging efficiency can be quickly restored. If the actual charging voltage is higher than the standard charging voltage at this time, the risk of overcharging can be quickly reduced.

[0057] At the same time, when the difference between the actual charging voltage and the standard charging voltage is small, the actual charging voltage is brought closer to the standard charging voltage with a smaller current change, so that the actual charging voltage can be closer to the standard charging voltage, avoiding overcharging while ensuring charging efficiency.

[0058] The target charging current is determined based on the current change, and the actual charging current of the power battery is adjusted based on the target charging current, so as to ensure charging efficiency while avoiding overcharging.

[0059] As an optional embodiment, the steps of the above embodiment are to determine the current change according to the interval to which the difference between the actual charging voltage and the standard charging voltage of the power battery belongs, and specifically include the following steps: The correction coefficient is determined based on the interval to which the difference between the actual charging voltage and the standard charging voltage of the power battery belongs. Among them, the same interval corresponds to a fixed correction coefficient, and the larger the difference in different intervals, the larger the corresponding correction coefficient. The product of the upper limit charging current of the power battery and the correction coefficient is calculated as the current change.

[0060] Specifically, the current variation in this embodiment is not obtained by presetting the corresponding relationship or functional relationship between the difference interval and the current variation as described in the above embodiment, but is obtained by calculating the product of the upper limit charging current of the power battery and the correction coefficient. The calculation formula is as follows: ΔI=I cmax ×β Where ΔI represents the current change, I cmax represents the upper limit of the power battery's charging current, and β represents the correction factor, with β∈(0,1). The correction factor is determined based on the range of the difference between the power battery's actual charging voltage and the standard charging voltage. Within each range, a fixed correction factor is assigned; larger differences within different ranges correspond to larger correction factors.

[0061] The product of the upper limit charging current of the power battery and the correction coefficient is calculated as the current change.

[0062] The difference interval between the actual charging voltage and the standard charging voltage, as well as the correction coefficient corresponding to each interval, can be pre-set. An interval can include only one value or a range of values, which is not limited in this embodiment. Each interval corresponds to a fixed correction coefficient; different intervals correspond to different correction coefficients, and the larger the difference within each interval, the larger the corresponding correction coefficient. The number of intervals can be set according to actual conditions, which is not limited in this embodiment. This allows the correction coefficient to be determined based on the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs.

[0063] A functional relationship β=f2(ΔV) can also be pre-set between the difference range between the actual charging voltage and the standard charging voltage and the correction factor, where β represents the correction factor and ΔV represents the difference range between the actual charging voltage and the standard charging voltage. An interval can include only a single value or a range of values, which is not limited in this embodiment. The functional relationship is as follows: the same interval corresponds to a fixed correction factor; different intervals correspond to different correction factors, and the larger the difference within each interval, the larger the corresponding correction factor. This facilitates determining the correction factor based on the interval to which the difference between the actual charging voltage and the standard charging voltage of the power battery falls.

[0064] It should be noted that different correction coefficients are set for different intervals, and the larger the difference within the different intervals, the larger the corresponding correction coefficient. The purpose is to calculate a larger current change through the correction coefficient when the difference between the actual charging voltage and the standard charging voltage is large. With a larger current change, the actual charging voltage can be quickly brought close to the standard charging voltage. If the actual charging voltage is lower than the standard charging voltage at this time, charging efficiency can be quickly restored. If the actual charging voltage is higher than the standard charging voltage at this time, the risk of overcharging can be quickly reduced.

[0065] At the same time, when the difference between the actual charging voltage and the standard charging voltage is small, a smaller current change is obtained by calculating the correction coefficient, and the actual charging voltage is brought closer to the standard charging voltage with a smaller current change, so that the actual charging voltage can be closer to the standard charging voltage, thereby ensuring charging efficiency and avoiding overcharging.

[0066] As an optional embodiment, the steps of the above embodiment determine the target charging current according to the current change, specifically including the following steps: The adjustment current is determined based on the actual charging current and the current change; the smaller current value is selected as the target charging current from the adjustment current and the upper limit charging current of the power battery.

[0067] In this embodiment, the adjustment current is determined according to the actual charging current and the current variation.

[0068] If the actual charging voltage is greater than the standard charging voltage, the actual charging current needs to be reduced to bring the actual charging voltage closer to the standard charging voltage. In this case, the current change can be subtracted from the actual charging current to obtain the adjusted current. If the actual charging voltage is less than the standard charging voltage, the actual charging current needs to be increased to bring the actual charging voltage closer to the standard charging voltage. In this case, the current change can be added to the actual charging current to obtain the adjusted current.

[0069] In order to avoid the situation where the adjustment current is too large or even exceeds the upper limit charging current of the power battery and to ensure charging safety, in the embodiment of the present application, a smaller current value is selected from the adjustment current and the upper limit charging current of the power battery as the target charging current, and the actual charging current of the power battery is adjusted so that the actual charging current of the power battery is adjusted accordingly in a direction close to the target charging current.

[0070] It should be noted that before adjusting the actual charging current to make the actual charging voltage closer to the standard charging voltage, the initial charging current is used as the actual charging current to charge the power battery. In some embodiments, the calculation formula for the initial charging current is as follows: I0=I cmax ×α Where I0 represents the initial charging current, I cmax represents the upper limit charging current of the power battery, α is a correction parameter, α∈(0,1), α can be set to a fixed value or adjusted according to temperature and / or SOC, which is not limited in this embodiment.

[0071] It is understandable that adjusting the actual charging current to make the actual charging voltage closer to the standard charging voltage is essentially adjusting the initial charging current. Therefore, the above process can be expressed as follows: I1=min{I0+ΔI,I cmax}=min{I0+I cmax ×β,I cmax} Among them, I0 represents the initial charging current, ΔI represents the current change, when the actual charging voltage is greater than the standard charging voltage, ΔI is negative, when the actual charging voltage is less than the standard charging voltage, ΔI is positive, I cmax represents the upper limit charging current of the power battery, β represents the correction parameter, and I1 represents the target charging current.

[0072] In the above embodiment, a smaller current value can be selected from the adjustment current and the upper limit charging current of the power battery as the target charging current, thereby avoiding an excessively large target charging current and ensuring charging safety.

[0073] As an optional embodiment, the steps of the above embodiment adjust the actual charging current of the power battery, specifically including the following steps: The current adjustment speed is determined based on the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs. Among them, the same interval corresponds to a fixed current adjustment speed, and the larger the difference in different intervals, the larger the corresponding current adjustment speed. The actual charging current of the power battery is adjusted according to the current adjustment speed.

[0074] The difference interval between the actual charging voltage and the standard charging voltage, as well as the current adjustment speed corresponding to each interval, can be pre-set. An interval can include only one value or a range of values, which is not limited in this embodiment. The same interval corresponds to a fixed current adjustment speed; different intervals correspond to different current adjustment speeds, and the greater the difference within different intervals, the greater the corresponding current adjustment speed. The number of intervals can be set according to actual conditions, which is not limited in this embodiment. This allows the current adjustment speed to be determined based on the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs.

[0075] It should be noted that different current adjustment speeds are set for different intervals, and the larger the difference between the different intervals, the faster the corresponding current adjustment speed. The purpose is to quickly make the actual charging voltage close to the standard charging voltage when the difference between the actual charging voltage and the standard charging voltage is large. If the actual charging voltage is lower than the standard charging voltage at this time, charging efficiency can be quickly restored. If the actual charging voltage is higher than the standard charging voltage at this time, the risk of overcharging can be quickly reduced.

[0076] At the same time, when the difference between the actual charging voltage and the standard charging voltage is small, the actual charging voltage is brought closer to the standard charging voltage at a slower speed so that the actual charging voltage can be closer to the standard charging voltage, thereby ensuring charging efficiency while avoiding overcharging and excessive adjustment.

[0077] As an optional embodiment, the method of the above embodiment further includes the following steps: At set time intervals, the actual charge capacity of the power battery is detected; if the actual charge capacity of the power battery does not reach the set charge capacity, the step of obtaining the current operating status parameters of the power battery is executed; if the actual charge capacity of the power battery reaches the set charge capacity, the power battery is charged using a full charge cut-off current constant current to an upper limit charging voltage of the power battery.

[0078] like Figure 3 As shown, every time the above-set time interval passes, the actual charging capacity of the power battery is detected to detect whether the actual charging capacity of the power battery reaches the set charging capacity.

[0079] If the actual charge capacity of the power battery reaches the set charge capacity, it means that the power battery is about to be fully charged. The full charge cut-off current of the power battery is used to charge the battery to the upper limit charge voltage of the power battery and then end the charging.

[0080] If the actual charging capacity of the power battery does not reach the set charging capacity, it is necessary to adjust the actual charging current of the power battery to the initial charging current, and then obtain the current operating status parameters of the power battery according to the records of the above embodiment to determine the standard charging voltage of the power battery under the operating status parameters. With the standard charging voltage as the target, the actual charging voltage of the power battery is adjusted.

[0081] like Figure 3 As shown, after the set time interval, the actual charge capacity of the power battery is detected again until the actual charge capacity of the power battery reaches the set charge capacity, and the full charge cut-off current of the power battery is used to charge the power battery to the upper limit charge voltage, and then the charging is terminated.

[0082] The above-set time interval can be set according to actual conditions, for example, to 1 second or 20 milliseconds, etc., which is not limited in this embodiment. The above-set charge amount can also be set according to actual conditions, for example, to 98% or 95%, etc., which is not limited in this embodiment.

[0083] The full charge cut-off current mentioned above refers to the critical value at which charging stops after the charging current drops to a preset threshold when the battery is nearly fully charged. The full charge cut-off current of the power battery model can be obtained in advance based on the model, specifications and other parameters of the power battery.

[0084] In the above embodiment, when the actual charging amount of the power battery reaches the set charging amount and is close to full charging, it can switch to the full charging cut-off current for charging to prevent overcharging and protect the battery life, while maximizing the charging capacity of the battery cell, and realizing full charging of the battery cell at different temperatures and different aging degrees.

[0085] In a specific embodiment, the difference between the actual charging voltage of the power battery and the standard charging voltage is divided into three intervals: interval 1, interval 2, and interval 3.

[0086] If the standard charging voltage is V target Indicates that V0, V1, and V2 represent different voltage values and V target -V0 is greater than the lower limit voltage, V target -V1 is greater than V target -V0, V targe t+V1 is greater than V target -V1,V target +V2 is greater than V target +V1, the upper limit voltage is greater than V target +V2, then in interval 1, the voltage range corresponding to the actual charging voltage is (lower limit voltage, V target -V0) and (V target +V2, upper limit voltage]; in interval 2, the actual charging voltage corresponds to the voltage range of [V target -V0, V target -V1) and (V target +V1,V target +V2]; in interval 3, the actual charging voltage corresponds to the voltage range of [V target -V1,V target +V1].

[0087] The correction parameter corresponding to interval 1 is β1, the correction parameter corresponding to interval 2 is β2, and the correction parameter corresponding to interval 3 is β3. In interval 3, the difference between the actual charging voltage and the standard charging voltage of the power battery is small, so no adjustment is required. That is, β3 is zero.

[0088] The charging control method of this embodiment may include the following steps: Step 1: Before the power battery leaves the factory, obtain the standard charging voltage V of the power battery at different temperatures and SOCs. target , upper limit charging current I cmax , Full charge cut-off current I stop and other parameters; Step 2: When charging, use the vehicle battery management system (BMS) to look up the table to obtain the current battery temperature and the standard charging voltage V under SOC. target ; Step 3: At every set time interval, determine whether the actual charge capacity of the vehicle reaches the set charge capacity. If so, execute step 4; if not, execute step 5. Step 4: Use I stop Constant current charging to the upper limit charging voltage; Step 5: Use the initial charging current I0=I cmax ×α starts charging; Step 6: Read the real-time voltage of all battery cells in the vehicle and obtain the highest voltage V max , judge V max Located in a certain voltage range under the current battery temperature and SOC; Step 7: When V max Located at (lower limit voltage, V target -V0), the vehicle is roughly boosted, that is, the vehicle charging current is quickly increased to I1, I1=min{I0+I cmax ×β1,I cmax}; Step 8: When V max Located in [V target -V0, V target -V1), the vehicle is fine-tuned to boost the voltage, that is, the vehicle charging current is slowly increased to I1, I1=min{I0+I cmax ×β2,I cmax}; Step 9: When V max Located in [V target -V1,V target +V1], the vehicle is subjected to constant pressure control, that is, I1 is kept constant, I1=min{I0, I cmax}; Step 10: When V max Located (V target +V1,V target +V2], the vehicle is fine-tuned to reduce the voltage, that is, the vehicle charging current is slowly reduced to I1, I1=min{I0-Icmax ×β2,I cmax}; Step 11: When V max Located (V target +V2, upper limit voltage], the vehicle is roughly stepped down, that is, the vehicle charging current is quickly reduced to I1, I1=min{I0-I cmax ×β1,I cmax}; Step 12. Go to step 3 and repeat steps 3-11 until the vehicle is fully charged.

[0089] In another specific embodiment, the charging control method may include the following steps: Step 1: Before the power battery leaves the factory, obtain the standard charging voltage of the power battery at different temperatures and SOC Vtarget , upper limit charging current I cmax , Full charge cut-off current I stop And other parameters. Specifically: According to the model, specifications and other parameters of the power battery, pre-test to obtain the standard charging voltage V of the power battery of this model at different temperatures and SOC target For example, for a certain type of lithium iron phosphate battery (LFP), when the temperature is 25°C and the SOC is 30%, its standard charging voltage V target is 3.65V; when the temperature is 45℃ and SOC is 80%, its standard charging voltage V target is 3.75V.

[0090] According to the model, specifications and other parameters of the power battery, pre-test to obtain the upper limit charging current of the power battery of this model Icmax It is a 2C rate.

[0091] According to the model, specifications and other parameters of the power battery, pre-test to obtain the full charge cut-off current I of the power battery of this model stop The rate is 0.05C.

[0092] Step 2: When charging, use the vehicle BMS to look up the table to obtain the standard charging voltage V under the current temperature and SOC. target For example, when the current temperature is 25°C and the SOC is 30%, the standard charging voltage V is obtained by looking up the table. target is 3.65V.

[0093] Step 3: At every set time interval, determine whether the actual charge capacity of the vehicle reaches the set charge capacity. If so, execute step 4; if not, execute step 5.

[0094] Step 4: Use I stopConstant current charging to the upper limit charging voltage. For example, when the battery is nearly fully charged, a constant current of 0.05C is used to charge the battery to the upper limit charging voltage.

[0095] Step 5: Use initial current I0=I cmax ×α, where α is 0.5. For example, charging starts with an initial current of I0 = 2C × 0.5 = 1C.

[0096] Step 6: Read the real-time voltage of all battery cells in the vehicle and obtain the highest voltage V max , judge V max Located in a certain voltage range under the current temperature and SOC.

[0097] Specifically include: Read the real-time voltage value of all battery cells in the vehicle through BMS. Compare the real-time voltage values of all battery cells and obtain the maximum real-time voltage value V max According to the current temperature and SOC, query the pre-acquired standard charging voltage V target curve, determine V max The voltage range. For example, when the current temperature is 25℃ and the SOC is 30%, the real-time voltage of the whole pack of batteries is V max .

[0098] Step 7: When V max Located at (lower limit voltage, V target -V0), the vehicle is roughly boosted, that is, the vehicle charging current is quickly increased to I1, I1=min{I0+I cmax ×β1,I cmax}, where β1 is 0.2 and V0 is 0.05V. For example, when V max When in the range of (2.8V, 3.65V-0.05V), I1=min{1C+2C×0.2, 2C}=1.4C.

[0099] Step 8: When V max Located in [V target -V0, V target -V1), the vehicle is fine-tuned to boost the voltage, that is, the vehicle charging current is slowly increased to I1, I1=min{I0+I cmax ×β2,I cmax}, where β2 is 0.1, V0 is 0.05V, and V1 is 0.02V. For example, when V max When in the range of (3.65V-0.05V, 3.65V-0.02V), I1=min{1C+2C×0.1, 2C}=1.2C.

[0100] Step 9: When V max Located in [V target-V1,V target +V1], the vehicle is subjected to constant pressure control, that is, I1 is kept constant, I1=min{I0, I cmax}. For example, when V max When in the range of (3.65V-0.02V, 3.65V+0.02V), I1=min{1C, 2C}=1C.

[0101] Step 10: When V max Located (V target +V1,V target +V2], the vehicle is fine-tuned to reduce the voltage, that is, the vehicle charging current is slowly reduced to I1, I1=min{I0-I cmax ×β2,I cmax}, where β2 is 0.1 and V2 is 0.04V. For example, when V max When in the range of (3.65V+0.02V, 3.65V+0.04V), I1=min{1C-2C×0.1, 2C}=0.8C.

[0102] Step 11: When V max Located (V target +V2, upper limit voltage], the vehicle is roughly stepped down, that is, the vehicle charging current is quickly reduced to I1, I1=min{I0-I cmax ×β1,I cmax}, where β1 is 0.2. For example, when V max When in the range of (3.65V+0.04V, upper limit voltage), I1=min{1C-2C×0.2, 2C}=0.6C.

[0103] Step 12. Go to step 3 and repeat steps 3-11 until the vehicle is fully charged.

[0104] Through the above steps, the charging current can be dynamically adjusted according to the maximum real-time voltage of all cells in the power battery, so that the real-time voltage and real-time current can be dynamically changed during the charging process, the charging capacity of the cells can be maximized, and the problems such as triggering the upper limit voltage can be avoided, thereby improving the charging efficiency and extending the battery life.

[0105] In another specific embodiment, the charging control method may include the following steps: Step 1: Before the power battery leaves the factory, obtain the standard charging voltage of the power battery at different temperatures and SOC Vtarget , upper limit charging current I cmax , Full charge cut-off current I stop And other parameters. Specifically: According to the model, specifications and other parameters of the power battery, pre-test to obtain the standard charging voltage V of the power battery of this model at different temperatures and SOC target For example, for a certain type of lithium manganese iron phosphate battery (LMFP), when the temperature is 15°C and the SOC is 20%, its standard charging voltage V target is 3.8V; when the temperature is 35℃ and the SOC is 60%, its standard charging voltage V target is 4.0V.

[0106] According to the model, specifications and other parameters of the power battery, pre-test to obtain the upper limit charging current of the power battery of this model Icmax The rate is 1.5C.

[0107] According to the model, specifications and other parameters of the power battery, pre-test to obtain the full charge cut-off current I of the power battery of this model stop The ratio is 0.053.

[0108] Step 2: When charging, use the vehicle BMS to look up the table to obtain the standard charging voltage V under the current temperature and SOC. target For example, when the current temperature is 25°C and the SOC is 40%, the standard charging voltage V is obtained by looking up the table. target is 3.9V.

[0109] Step 3: At every set time interval, determine whether the actual charge capacity of the vehicle reaches the set charge capacity. If so, execute step 4; if not, execute step 5.

[0110] Step 4: Use I stop Constant current charging to the upper limit charging voltage. For example, when the battery is nearly fully charged, a constant current of 0.03C is used to charge the battery to the upper limit charging voltage.

[0111] Step 5: Use initial current I0=I cmax ×α, where α is 0.6. For example, the initial current I0 = 1.5C × 0.6 = 0.9C is used to start charging.

[0112] Step 6: Read the real-time voltage of all battery cells in the vehicle and obtain the highest voltage V max , judge V max Located in a certain voltage range under the current temperature and SOC.

[0113] Specifically include: Read the real-time voltage value of all battery cells in the vehicle through BMS. Compare the real-time voltage values of all battery cells and obtain the maximum real-time voltage value V max According to the current temperature and SOC, query the pre-acquired standard charging voltage Vtarget curve, determine V max The voltage range it is in. For example, when the current temperature is 25°C and the SOC is 40%, the real-time voltage of the entire battery pack is V max .

[0114] Step 7: When V max Located at (lower limit voltage, V target -V0), the vehicle is roughly boosted, that is, the vehicle charging current is quickly increased to I1, I1=min{I0+I cmax ×β1,I cmax}, where β1 is 0.3 and V0 is 0.03V. When V max When in the range of (lower limit voltage, 3.9V-0.03V), I1=min{0.9C+1.5C×0.3, 1.5C}=1.35C.

[0115] Step 8: When V max Located in [V target -V0, V target -V1), the vehicle is fine-tuned to boost the voltage, that is, the vehicle charging current is slowly increased to I1, I1=min{I0+I cmax ×β2,I cmax}, where β2 is 0.15, V0 is 0.03V, and V1 is 0.01V. For example, when V max When in the range of (3.9V-0.03V, 3.9V-0.01V), I1=min{0.9C+1.5C×0.15, 1.5C}=1.125C.

[0116] Step 9: When V max Located in [V target -V1,V target +V1], the vehicle is subjected to constant pressure control, that is, I1 is kept constant, I1=min{I0, I cmax}. For example, when V max When in the range of (3.9V-0.01V, 3.9V+0.01V), I1=min{0.9C, 1.5C}=0.9C.

[0117] Step 10: When V max Located (V target +V1,V target +V2], the vehicle is fine-tuned to reduce the voltage, that is, the vehicle charging current is slowly reduced to I1, I1=min{I0-I cmax ×β2,I cmax}, where β2 is 0.15 and V2 is 0.02V. For example, when V maxWhen in the range of (3.9V+0.01V, 3.9V+0.02V), I1=min{0.9C-1.5C×0.15, 1.5C}=0.675C.

[0118] Step 11: When V max Located (V target +V2, upper limit voltage], the vehicle is roughly stepped down, that is, the vehicle charging current is quickly reduced to I1, I1=min{I0-I cmax ×β1,I cmax}, where β1 is 0.3. For example, when V max When in the range of (3.9V+0.02V, upper limit voltage), I1=min{0.9C-1.5C×0.3, 1.5C}=0.45C.

[0119] Step 12. Go to step 3 and repeat steps 3-11 until the vehicle is fully charged.

[0120] Through the above steps, the charging current can be dynamically adjusted based on the maximum real-time voltage of all cells in the battery pack. This allows for dynamic changes in real-time voltage and current during charging, maximizing the cell's charging capacity and avoiding issues such as triggering the upper voltage limit. This improves charging efficiency and extends battery life. This charging control strategy offers considerable flexibility and versatility, not only optimizing the charging issues of current lithium iron phosphate battery systems but also being applicable to lithium manganese iron phosphate battery systems.

[0121] In another specific embodiment, the charging control method may include the following steps: Step 1: Before the power battery leaves the factory, obtain the standard charging voltage of the power battery at different temperatures and SOC Vtarget , upper limit charging current I cmax , Full charge cut-off current I stop And other parameters. Specifically: According to the model, specifications and other parameters of the power battery, pre-test to obtain the standard charging voltage V of the power battery of this model at different temperatures and SOC target For example, for a certain type of lithium iron phosphate battery (LFP), when the temperature is 25°C and the SOC is 30%, its standard charging voltage V target is 3.65V; when the temperature is 45℃ and SOC is 80%, its standard charging voltage V target is 3.75V.

[0122] According to the model, specifications and other parameters of the power battery, pre-test to obtain the upper limit charging current of the power battery of this model Icmax It is a 2C rate.

[0123] According to the model, specifications and other parameters of the power battery, pre-test to obtain the full charge cut-off current I of the power battery of this model stop The rate is 0.05C.

[0124] Step 2: When charging, use the vehicle BMS to look up the table to obtain the standard charging voltage V under the current temperature and SOC. target For example, when the current temperature is 25°C and the SOC is 30%, the standard charging voltage V is obtained by looking up the table. target is 3.65V.

[0125] Step 3: At every set time interval, determine whether the actual charge capacity of the vehicle reaches the set charge capacity. If so, execute step 4; if not, execute step 5.

[0126] Step 4: Use I stop Constant current charging to the upper limit charging voltage. For example, when the battery is nearly fully charged, a constant current of 0.05C is used to charge the battery to the upper limit charging voltage.

[0127] Step 5: Use initial current I0=I cmax ×α, where α is 0.5. For example, charging starts with an initial current of I0 = 2C × 0.5 = 1C.

[0128] Step 6: Read the real-time voltage of all battery cells in the vehicle and obtain the highest voltage V max , judge V max Located in a certain voltage range under the current temperature and SOC.

[0129] Specifically include: Read the real-time voltage value of all battery cells in the vehicle through BMS. Compare the real-time voltage values of all battery cells and obtain the maximum real-time voltage value V max According to the current temperature and SOC, query the pre-acquired standard charging voltage V target curve, determine V max The voltage range. For example, when the current temperature is 25℃ and the SOC is 30%, the real-time voltage of the whole pack of batteries is V max .

[0130] Step 7: Calculate V in the whole package max With the standard charging voltage V target The difference between them is ΔV, ΔV=V target -V max For example, when V max =3.55V, V target =3.65V, ΔV1=100mV; when V max =3.61V, V target =3.65V, ΔV2=40mV; when V max=3.68V, V target =3.65V, ΔV3=-30mV.

[0131] Step 8. Use the function expression to calculate the current change value ΔI, where ΔI = f1(ΔV). For example, when ΔV1 = 100mV, ΔI1 = f1(ΔV1) = 0.5C; when ΔV2 = 40mV, ΔI2 = f1(ΔV2) = 0.28C; and when ΔV3 = -30mV, ΔI3 = f1(ΔV3) = -0.25C.

[0132] Step 9: Adjust the current value I1=min{I0+ΔI, Icmax} according to the current change value. For example, when ΔI1=0.5C, I1=min{I0+0.5C, I cmax}=1.5C; when ΔI2=0.28C, I2=min{I0+0.28C, I cmax}=1.28C; when ΔI3=-0.25C, I3=min{I0-0.25, I cmax}=0.75C.

[0133] Step 10. Go to step 3 and repeat steps 3-9 until the vehicle is fully charged.

[0134] Through the above steps, the charging current can be dynamically adjusted according to the maximum real-time voltage of all cells in the power battery, so that the real-time voltage and real-time current can be dynamically changed during the charging process, the charging capacity of the cells can be maximized, and the problems such as triggering the upper limit voltage can be avoided, thereby improving the charging efficiency and extending the battery life.

[0135] Corresponding to the aforementioned application function implementation method embodiment, the present application also provides a charging control device, a charging control equipment, a vehicle, a computer-readable storage medium, a computer program product and corresponding embodiments.

[0136] Figure 4 It is a structural diagram of a charging control device shown in an embodiment of the present application.

[0137] See also Figure 4 , the charging control device includes: The acquisition module 100 is used to obtain the current operating state parameters of the power battery and determine the standard charging voltage of the power battery under the operating state parameters; The adjustment module 110 is configured to adjust the actual charging voltage of the power battery with the standard charging voltage as a target.

[0138] Furthermore, the adjustment module 110 of the above embodiment is specifically used to adjust the actual charging voltage of the power battery with the standard charging voltage as the target: By adjusting the actual charging current of the power battery, the actual charging voltage of the power battery is made to converge towards the standard charging voltage.

[0139] Furthermore, the adjustment module 110 of the above embodiment is specifically used to adjust the actual charging current of the power battery: The current variation is determined based on the interval to which the difference between the actual charging voltage and the standard charging voltage of the power battery belongs. A fixed current variation corresponds to the same interval, and the larger the difference within different intervals, the larger the corresponding current variation. The target charging current is determined based on the current variation, and the actual charging current of the power battery is adjusted based on the target charging current.

[0140] Furthermore, the adjustment module 110 of the above embodiment is specifically configured to: The correction coefficient is determined based on the interval to which the difference between the actual charging voltage and the standard charging voltage of the power battery belongs. Among them, the same interval corresponds to a fixed correction coefficient, and the larger the difference in different intervals, the larger the corresponding correction coefficient. The product of the upper limit charging current of the power battery and the correction coefficient is calculated as the current change.

[0141] Furthermore, when determining the target charging current according to the current variation, the adjustment module 110 of the above embodiment is specifically configured to: The adjustment current is determined based on the actual charging current and the current change; the smaller current value is selected as the target charging current from the adjustment current and the upper limit charging current of the power battery.

[0142] Furthermore, when adjusting the actual charging current of the power battery, the adjustment module 110 of the above embodiment is specifically used to: The current adjustment speed is determined based on the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs. Among them, the same interval corresponds to a fixed current adjustment speed, and the larger the difference in different intervals, the larger the corresponding current adjustment speed. The actual charging current of the power battery is adjusted according to the current adjustment speed.

[0143] Furthermore, the apparatus of the above embodiment further includes: The detection module is used to detect the actual charge capacity of the power battery at set time intervals; if the actual charge capacity of the power battery does not reach the set charge capacity, the acquisition module 100 is used to execute the step of obtaining the current operating status parameters of the power battery; if the actual charge capacity of the power battery reaches the set charge capacity, the adjustment module 110 is used to charge the power battery to the upper limit charging voltage using the full charge cut-off current of the power battery.

[0144] Furthermore, the actual charging voltage of the power battery in the above embodiment includes the voltage corresponding to the cell with the highest voltage in the power battery.

[0145] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated again here.

[0146] Figure 5 It is a structural diagram of a charging control device shown in an embodiment of the present application.

[0147] See also Figure 5 , the charging control device includes a memory 200 and a processor 210 .

[0148] The processor 210 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0149] Memory 200 may include various types of storage units, such as system memory, read-only memory (ROM), and permanent storage. ROM may store static data or instructions required by processor 210 or other computer modules. Permanent storage may be a readable and writable storage device. Permanent storage may be a non-volatile storage device that retains stored instructions and data even when the computer is powered off. In some embodiments, the permanent storage device utilizes a mass storage device (e.g., a magnetic or optical disk, flash memory). In other embodiments, the permanent storage device may be a removable storage device (e.g., a floppy disk, optical drive). System memory may be a readable and writable storage device or a volatile readable and writable storage device, such as dynamic random access memory (DRAM). System memory may store some or all instructions and data required by the processor during operation. Furthermore, memory 200 may include any combination of computer-readable storage media, including various types of semiconductor memory chips (e.g., DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), as well as magnetic disks and / or optical disks. In some embodiments, the memory 200 may include a readable and / or writable removable storage device, such as a compact disc (CD), a read-only digital versatile disc (e.g., DVD-ROM, double-layer DVD-ROM), a read-only Blu-ray disc, an ultra-density optical disc, a flash memory card (e.g., SD card, mini SD card, Micro-SD card, etc.), a magnetic floppy disk, etc. Computer-readable storage media do not include carrier waves and transient electronic signals transmitted wirelessly or wired.

[0150] The memory 200 stores executable codes. When the executable codes are processed by the processor 210 , the processor 210 can execute part or all of the above-mentioned methods.

[0151] Figure 6 It is a schematic structural diagram of a vehicle shown in an embodiment of the present application.

[0152] See also Figure 6 The vehicle of this embodiment includes a charging control device 300, which is configured to execute part or all of the methods described above.

[0153] The charging control device 300 can be located in the vehicle's center console or any other location, such as the vehicle's engine compartment. The charging control device can be an electronic device embedded in an ECU, or a processing chip independent of the ECU. Alternatively, the charging control device 300 can be one or more ECUs specifically designed to control the charging process.

[0154] The vehicle provided in this embodiment belongs to the same application concept as the battery system monitoring method provided in the above embodiments of this application, can execute the battery system monitoring method provided in any of the above embodiments of this application, and has the corresponding functional modules and beneficial effects for executing the above battery system monitoring method. The technical details that are not fully described in this embodiment can be referred to the specific processing content of the battery system monitoring method provided in the above embodiments of this application, and will not be repeated here.

[0155] Furthermore, the method according to the present application may also be implemented as a computer program product, which includes computer program code instructions for executing some or all of the steps of the method described above. Optionally, the computer program product may be stored on a computer-readable storage medium or in the cloud; the computer device's processor reads the computer program from the computer-readable storage medium or the cloud.

[0156] The computer program product may be written in any combination of one or more programming languages to implement the program code for performing the operations of the embodiments of the present application, including object-oriented programming languages such as Java, C++, and conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0157] The computer program product may be implemented in hardware, software, or a combination thereof. In one embodiment, the computer program product is implemented as a computer storage medium. In another embodiment, the computer program product is implemented as a software product, such as a software development kit (SDK).

[0158] Alternatively, the present application can also be implemented as a computer-readable storage medium (or non-transitory machine-readable storage medium or machine-readable storage medium), which stores executable code (or computer program or computer instruction code) and, when executed by a processor of an electronic device (or server, etc.), enables the processor to perform part or all of the steps of the above-mentioned method according to the present application.

[0159] The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0160] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A charging control method, characterized in that: include: Acquiring current operating state parameters of the power battery and determining a standard charging voltage of the power battery under the operating state parameters; The actual charging voltage of the power battery is adjusted with the standard charging voltage as a target.

2. The charging control method according to claim 1, wherein: The adjusting the actual charging voltage of the power battery with the standard charging voltage as a target includes: By adjusting the actual charging current of the power battery, the actual charging voltage of the power battery is made to converge toward the standard charging voltage.

3. The charging control method according to claim 2, wherein: The adjusting the actual charging current of the power battery includes: determining a current variation according to the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs; wherein the same interval corresponds to a fixed current variation, and a larger difference within different intervals corresponds to a larger current variation; A target charging current is determined according to the current variation, and the actual charging current of the power battery is adjusted based on the target charging current.

4. The charging control method according to claim 3, wherein: The determining the current variation according to the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs includes: Determine a correction coefficient based on the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs; wherein the same interval corresponds to a fixed correction coefficient, and the larger the difference in different intervals, the larger the corresponding correction coefficient; The product of the upper limit charging current of the power battery and the correction coefficient is calculated as the current change.

5. The charging control method according to claim 3, wherein: The determining the target charging current according to the current variation includes: determining an adjustment current according to the actual charging current and the current variation; From the adjustment current and the upper limit charging current of the power battery, a smaller current value is selected as the target charging current.

6. The charging control method according to claim 3, characterized in that: The adjusting the actual charging current of the power battery includes: Determining the current adjustment speed according to the interval to which the difference between the actual charging voltage of the power battery and the standard charging voltage belongs; wherein the same interval corresponds to a fixed current adjustment speed, and the larger the difference in different intervals, the larger the corresponding current adjustment speed; The actual charging current of the power battery is adjusted according to the current adjustment speed.

7. The charging control method according to claim 1, wherein: Also includes: Detect the actual charge level of the power battery at set time intervals; If the actual charge capacity of the power battery does not reach the set charge capacity, the step of obtaining the current operating status parameter of the power battery is executed; if the actual charge capacity of the power battery reaches the set charge capacity, the power battery is charged with a full charge cut-off current constant current to an upper limit charging voltage of the power battery.

8. The charging control method according to any one of claims 1 to 7, characterized in that: The actual charging voltage of the power battery includes the voltage corresponding to the battery cell with the highest voltage in the power battery.

9. A charging control device, characterized in that: include: an acquisition module, configured to acquire current operating state parameters of the power battery and determine a standard charging voltage of the power battery under the operating state parameters; The adjustment module is used to adjust the actual charging voltage of the power battery with the standard charging voltage as a target.

10. A charging control device, characterized in that: include: processor; as well as A memory having executable codes stored thereon, which, when executed by the processor, causes the processor to execute the method according to any one of claims 1 to 8.

11. A vehicle, characterized in that: include: charging control equipment; The charging control device is configured to be able to execute the method according to any one of claims 1 to 8.

12. A computer-readable storage medium, characterized in that An executable code is stored thereon, and when the executable code is executed by a processor of an electronic device, the processor is caused to execute the method according to any one of claims 1 to 8.

13. A computer program product, characterized in that The computer program product comprises computer instructions, and when the computer instructions are executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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