Battery fast charging protection method and device, electronic equipment and computer program product

Abstract

The invention relates to the technical field of new energy automobiles, and provides a battery fast charging protection method and device, electronic equipment and a computer program product. Comprising the steps of obtaining a current charge state of a battery; under the condition that the normal charging precondition of the battery is met, the charge state of the next moment is calculated based on the current charge state; determining the maximum fast charging current at the next moment based on the charge state at the next moment; obtaining the theoretical maximum output current of the charging pile; determining the allowable maximum output current of the charging pile based on the comparison of the theoretical maximum output current and the charging pile direct current fast charging maximum current; and determining the smaller value of the allowable maximum output current of the charging pile and the maximum fast charging current at the next moment as the charging current at the next moment. The method can dynamically cooperate with the future charging demand of the battery and the real-time output capability of the charging pile, achieves the active adaptation and cooperative control between the battery and the charging facility, and improves the intelligence and reliability of the quick charging process on the premise of guaranteeing the safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, in particular to a battery fast charging protection method and device, electronic equipment and computer program product. BACKGROUND

[0002] With the rapid development of new energy vehicles, battery charging technology has also developed rapidly, especially fast charging technology, which limits the application and use of new energy vehicles. The most widely used battery fast charging technology at present is to limit the maximum current according to the current state of charge SOC of the battery, so as to protect the battery from safety accidents. This method only starts from the single state of the battery itself for passive protection, and fails to take the actual output capacity of the charging facility and the dynamic change into the control closed loop, which is a static and isolated control strategy.

[0003] At present, the fast charging strategy is basically based on the current state of the battery to control the battery charging current. In this case, the charging power grid and the charging pile need to have a stable state. If the power grid and the charging pile fluctuate with the actual situation, the actual charging current and the demand will be inconsistent, which is easy to cause accidents. The deeper problem is that the existing strategy lacks prediction and collaborative management of future states. When the output power of the charging pile decreases due to power grid fluctuations, if the battery side still requests charging according to its maximum allowed current, it may overload the charging pile. Conversely, when the charging pile capacity recovers and the battery state has changed, it is not possible to timely increase the current to the optimal value. This disconnection between the control of the battery and the charging pile not only limits the charging efficiency, but also lays the foundation for equipment damage or safety risks caused by the mismatch between the two.

[0004] Therefore, the existing technology has an urgent technical problem to be solved, that is, how to design a fast charging protection strategy that can dynamically coordinate the future charging demand of the battery and the real-time output capacity of the charging pile, so as to realize active adaptation and collaborative control between the battery and the charging facility, and improve the intelligence and reliability of the fast charging process under the premise of ensuring safety. SUMMARY

[0005] Therefore, the present application provides a battery fast charging protection method and device, electronic equipment and computer program product, which can dynamically coordinate the future charging demand of the battery and the real-time output capacity of the charging pile, realize active adaptation and collaborative control between the battery and the charging facility, and improve the intelligence and reliability of the fast charging process under the premise of ensuring safety.

[0006] A first aspect of the present application provides a battery fast charging protection method, comprising: obtaining the current state of charge SOC of the battery; under the condition that the preconditions for normal charging of the battery are met, calculating the state of charge SOC at the next time based on the current state of charge SOC+1 ; determining a next time maximum fast charging current I +1 based on the next time state of charge SOC soc ; obtaining a theoretical maximum output current i0 of the charging pile; determining an allowed maximum output current i of the charging pile based on a comparison between the theoretical maximum output current i0 and a maximum direct current fast charging current i max of the charging pile; determining a charging current at the next time as a smaller value between the allowed maximum output current i of the charging pile and the next time maximum fast charging current I soc .

[0007] In one embodiment, further comprising: obtaining a temperature T, a charging voltage V and a charging current I of the battery; if the current state of charge SOC is in a first preset range, the temperature T is in a second preset range, the charging voltage V is in a third preset range and the charging current I is in a fourth preset range, it is determined that a normal battery charging precondition is met.

[0008] In one embodiment, the first preset range is SOC min <SOC<SOC max , the second preset range is T min <T<T max , the third preset range is V min <V<V max , and the fourth preset range is I min <I<I max ; wherein SOC min , SOC max are respectively a minimum value of battery state of charge and a maximum value of battery state of charge; T min , T max are respectively a minimum value of battery operating temperature and a maximum value of battery operating temperature; V min , V max are respectively a minimum value of battery operating voltage and a maximum value of battery operating voltage; and I min , I max are respectively a minimum value of battery operating current and a maximum value of battery operating current.

[0009] In one embodiment, the next time state of charge SOC +1 is calculated by the following formula: SOC +1 =SOC+I×△t; Where △t is the preset signal acquisition and processing time interval.

[0010] In one embodiment, the state of charge (SOC) based on the next time step... +1 Determine the maximum fast charging current I at the next moment. soc ,include: Query the preset battery characteristic lookup table to obtain the battery state of charge (SOC) at the next time step. +1 The corresponding maximum fast charging current I at the next moment soc .

[0011] In one embodiment, obtaining the theoretical maximum output current i0 of the charging pile includes: If the battery's charging voltage V is less than the charging pile's maximum output voltage U max Then the theoretical maximum output current of the charging pile is i0 = P. max / V; If the charging voltage V of the battery is greater than or equal to the maximum output voltage U of the charging pile max Then the theoretical maximum output current of the charging pile is i0 = P. max / U max ; Among them, P max This is the maximum output power of the charging station.

[0012] In one embodiment, the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile are used as the basis for the comparison. max The comparison determines the maximum allowable output current i of the charging pile, including: The theoretical maximum output current i0 is compared with the maximum DC fast charging current i of the charging pile. max Compare; The maximum allowable output current i of the charging pile is determined as the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile. max The smaller value in the range.

[0013] A second aspect of this application provides a battery fast-charging protection device, comprising: The data acquisition module is used to acquire the current state of charge (SOC) of the battery. The next-moment state of charge (SOC) calculation module is used to calculate the next-moment state of charge (SOC) based on the current SOC, provided that the preconditions for normal battery charging are met. +1 ; The next-moment maximum fast charging current determination module is used to determine the state of charge (SOC) based on the next moment. +1 Determine the maximum fast charging current I at the next moment. soc ; Theoretical maximum output current determination module, used to obtain the theoretical maximum output current i0 of the charging pile; The maximum output current determination module is used to determine the maximum output current based on the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile. max By comparing the values, the maximum allowable output current i of the charging pile is determined; The charging current determination module is used to compare the maximum allowable output current i of the charging pile with the maximum fast charging current I at the next moment. soc The smaller value in the equation is determined as the charging current at the next moment.

[0014] A third aspect of this application provides an electronic device including a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the electronic device implements the battery fast charging protection method provided in the first aspect of this application.

[0015] A fourth aspect of this application provides a computer program product including a computer program that, when run, causes the method described in the first aspect of this application to be performed.

[0016] The battery fast charging protection method provided in the first aspect of this application effectively improves the safety and coordination of the fast charging process by introducing a charging current decision mechanism based on the prediction of the battery's future state. This method not only focuses on the battery's current state of charge but, more importantly, predicts the state of charge at the next moment and determines the maximum acceptable charging current for the battery accordingly. Simultaneously, the method comprehensively considers the theoretical output capacity and hardware limits of the charging pile, ultimately selecting the smaller value between the battery's demand and the charging pile's capacity as the instruction. This collaborative decision-making mechanism, in principle, avoids overload requirements on either the battery or the charging pile, transforming charging control from static, passive adaptation to dynamic, forward-looking collaborative management. This maximizes the potential of fast charging while ensuring battery safety. It can dynamically coordinate the battery's future charging needs with the charging pile's real-time output capacity, achieving active adaptation and collaborative control between the battery and charging facilities, improving the intelligence and reliability of the fast charging process while ensuring safety. It avoids situations where unstable grid voltage and current during charging cause inconsistencies between demand and reality, resulting in charging failure or damage to the battery or charging equipment.

[0017] It is understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic flowchart of a battery fast charging protection method provided in an embodiment of this application; Figure 2 This is a schematic representation of battery characteristics provided in one embodiment of this application; Figure 3 This is a schematic diagram of the battery fast charging protection device provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0020] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0021] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0022] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0023] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0024] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0026] like Figure 1 As shown, the battery fast charging protection method provided in this application embodiment includes the following steps S101 to S106: Step S101: Obtain the current state of charge (SOC) of the battery; Step S102: Under the premise that the preconditions for normal battery charging are met, calculate the next state of charge (SOC) based on the current SOC. +1 ; Step S103: Based on the next moment's state of charge (SOC) +1 Determine the maximum fast charging current I at the next moment. soc ; Step S104: Obtain the theoretical maximum output current i0 of the charging pile; Step S105: Based on the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile... max By comparing the values, the maximum allowable output current i of the charging pile is determined; Step S106: Combine the maximum allowable output current i of the charging pile with the maximum fast charging current I at the next moment. soc The smaller value in the equation is determined as the charging current at the next moment.

[0027] In application, the current state of charge (SOC) of the battery is first obtained. This data can be collected by the sensors of the battery management system (BMS) and obtained through analog-to-digital conversion. Then, after the control unit verifies that the battery meets the preconditions for normal charging, the following steps are performed: This includes predictive calculations based on the current state of charge (SOC) to obtain the SOC at the next time step. +1 This prediction can be calculated by integrating the current current with the time interval. Then, based on the state of charge (SOC) at the next moment...+1 The maximum fast charging current I at the next moment is determined by querying a preset battery characteristic data table. soc This datasheet stores the maximum acceptable charging current for the battery at different SOCs to avoid lithium plating. It also obtains the theoretical maximum output current i0 of the charging station, a value that depends on the charging station's real-time output power and voltage capability. Then, it compares the theoretical maximum output current i0 with the maximum DC fast charging current i allowed by the charging station hardware. max The smaller value is determined as the maximum allowable output current i of the charging pile. Finally, the I value on the battery side is... soc The charging current is compared with the value of 'i' on the charging pile side, and the smaller value is determined as the charging current command to be executed at the next moment, thus ensuring that the charging current never exceeds the safety limits of either the battery or the charging pile. It can dynamically coordinate the future charging needs of the battery with the real-time output capabilities of the charging pile, achieving active adaptation and collaborative control between the battery and charging facilities, improving the intelligence and reliability of the fast charging process while ensuring safety.

[0028] This application's embodiments effectively improve the safety and coordination of the fast charging process by introducing a charging current decision-making mechanism based on predicting the future state of the battery. This method not only focuses on the battery's current state of charge but, more importantly, predicts the state of charge at the next moment and determines the maximum acceptable charging current for the battery accordingly. Simultaneously, the method comprehensively considers the theoretical output capacity and hardware limits of the charging pile, ultimately selecting the smaller value between battery demand and charging pile capacity as the command. This collaborative decision-making mechanism, in principle, avoids overloading either the battery or the charging pile, transforming charging control from static, passive adaptation to dynamic, forward-looking collaborative management. This maximizes the fast charging potential while ensuring battery safety. It also avoids situations where unstable grid voltage and current during charging cause discrepancies between demand and reality, resulting in charging failure or damage to the battery or charging equipment.

[0029] In one embodiment, it also includes: Obtain the battery's temperature T, charging voltage V, and charging current I; If the current state of charge (SOC) is within a first preset range, the temperature (T) is within a second preset range, the charging voltage (V) is within a third preset range, and the charging current (I) is within a fourth preset range, then the preconditions for normal battery charging are met.

[0030] In the application, while obtaining the current state of charge (SOC), the battery temperature T is obtained through a temperature sensor, the battery charging voltage V is obtained through a voltage detection circuit, and the battery charging current I is obtained through a current sensor.

[0031] The four parameters are then logically ANDed to determine whether the battery meets the preconditions for normal charging. Specifically, the battery is considered to be charged only when the State of Charge (SOC) is within the first preset range, the temperature (T) is within the second preset range, the charging voltage (V) is within the third preset range, and the charging current (I) is within the fourth preset range. The temperature (T) can be obtained using a negative temperature coefficient thermistor attached to the battery module.

[0032] This application embodiment adds real-time monitoring and condition judgment of multiple key battery state parameters, incorporating state of charge, temperature, voltage, and current into the preconditions for normal charging. This multi-parameter fusion judgment strategy constructs a multi-dimensional safety redundancy system, which can more comprehensively perceive the real-time health status of the battery system and ensure that the fast charging strategy is activated only when all key parameters are within the safety window. From the system level, it prevents the chain risks that may be caused by blindly charging with high current when the battery state is abnormal (such as local overheating or abnormal voltage), and improves the robustness of the system.

[0033] In one embodiment, the first preset range is SOC. min <SOC<SOC max The second preset range is T min <T<T max The third preset range is V min <V<V max The fourth preset range is I. min <I<I max ; Among them, SOC min SOC max These are the minimum and maximum limits for battery state of charge, respectively; T min T max These are the minimum and maximum operating temperatures of the battery, respectively; V min V max These are the minimum and maximum limits of the battery operating voltage, respectively; I min I max These are the minimum and maximum operating current limits for the battery, respectively.

[0034] In application, the first preset range is determined by the minimum state of charge (SOC) of the battery. min and maximum limit SOC max The first preset range is defined to prevent overcharging or over-discharging. The second preset range is defined by the minimum battery operating temperature T. min and maximum limit T max The third preset range is defined to ensure the battery operates within a suitable temperature window. This range is determined by the minimum battery operating voltage (V). min and maximum limit V maxDefine and avoid dangerous situations caused by excessively high or low voltage. The fourth preset range is defined by the minimum battery operating current I. min and maximum limit I max These limits are defined to prevent current surges. These limits are all constants pre-set based on battery chemistry and safety standards, and are stored in the controller's non-volatile memory.

[0035] These limits in the embodiments of this application are set based on the chemical and physical characteristics of the battery, transforming abstract safety conditions into numerical logic that the controller can accurately compare. This enables the battery management system to make fast and definite binary judgments, avoiding control delays or misjudgments caused by threshold ambiguity, thereby laying an accurate data foundation for the reliable execution of the entire fast charging protection strategy.

[0036] In one embodiment, the next state of charge (SOC) +1 Calculated using the following formula: SOC +1 =SOC+I×△t; Where △t is the preset signal acquisition and processing time interval.

[0037] In applications, the state of charge (SOC) at the next moment is calculated using a pre-defined mathematical formula. +1 Specifically, it involves adding the product of the current state of charge (SOC) with the current charging current (I) and the signal acquisition and processing time interval (Δt), i.e., SOC. +1 =SOC + I × Δt. Where the current I is in amperes, and the time interval Δt is in hours. This calculation is performed by the microcontroller of the battery management system within each fixed control cycle; for example, Δt can be set to one hundred milliseconds. The current I is the average value sampled within that cycle. This formula is based on the principle of charge conservation, estimating the increase in SOC by integrating the change in current over time.

[0038] This application embodiment uses the current integrated over time to estimate the change in charge. The formula has a clear physical meaning and low computational cost, making it very suitable for real-time operation in embedded controllers. It enables forward-looking prediction of battery state and provides key data input on the future time scale for subsequent determination of the maximum charging current. This makes the control strategy no longer simply respond to the current situation, but can adjust the current one step ahead, smooth the charging process, and avoid drastic fluctuations in current command.

[0039] In one embodiment, the state of charge (SOC) based on the next time step... +1 Determine the maximum fast charging current I at the next moment. soc ,include: Query the preset battery characteristic lookup table to obtain the battery state of charge (SOC) at the next time step. +1The corresponding maximum fast charging current I at the next moment soc .

[0040] In applications, such as Figure 2 As shown, the state of charge (SOC) is obtained at the next moment. +1 After obtaining the value, the maximum fast charging current I at the next moment is determined by querying a pre-established battery characteristic lookup table stored in memory. soc This lookup table uses the SOC value as an index and associates the maximum allowable charging current value of the battery without generating lithium dendrites at different SOCs. The table is calibrated through a large amount of experimental data, and the lookup process is implemented through the microcontroller's table lookup instructions or software algorithms.

[0041] This application embodiment determines the maximum fast charging current by querying a preset battery characteristic lookup table. This lookup table essentially pre-calibrates and stores the safe charging boundaries of the battery's complex electrochemical characteristics under different states of charge using experimental data. It transforms the complex and nonlinear battery safety boundary calculation problem into an efficient table lookup operation, which not only ensures the scientificity and accuracy of the current limit setting, but also meets the real-time requirements of the controller's calculation speed. It is a key technical means to achieve a balance between optimal battery charging and safety protection.

[0042] In one embodiment, obtaining the theoretical maximum output current i0 of the charging pile includes: If the battery's charging voltage V is less than the charging pile's maximum output voltage U max Then the theoretical maximum output current of the charging pile is i0 = P. max / V; If the charging voltage V of the battery is greater than or equal to the maximum output voltage U of the charging pile max Then the theoretical maximum output current of the charging pile is i0 = P. max / U max ; Among them, P max This is the maximum output power of the charging station.

[0043] In applications, the real-time charging voltage V of the battery is compared with the maximum output voltage U of the charging pile. max The theoretical maximum output current i0 of the charging pile is calculated based on the relationship between the magnitudes of the voltages. Specifically, when the battery voltage V is detected to be less than U... max At that time, the theoretical maximum output current i0 is equal to the maximum output power P of the charging pile. max Divide by the real-time voltage V, when the battery voltage V is greater than or equal to U max At that time, the theoretical maximum output current i0 is equal to P. max Divide by U max , where P max and U max These are the inherent nameplate parameters of the charging station.

[0044] This application embodiment dynamically calculates the theoretical maximum output current of the charging pile, taking into account the actual impact of battery voltage changes on the output power capability of the charging pile during charging. The method selects the correct formula to calculate the maximum possible current under the current power based on the relative magnitude relationship between the battery voltage and the maximum output voltage of the charging pile, making the output capability assessment of the charging pile more in line with the actual working conditions. This avoids the problem that the power demand may exceed the charging pile's capability if the hardware limit current is simply used as a constraint when the battery voltage is low, thus ensuring that the charging pile always works stably within its power capability range.

[0045] In one embodiment, the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile are used as the basis for the comparison. max The comparison determines the maximum allowable output current i of the charging pile, including: The theoretical maximum output current i0 is compared with the maximum DC fast charging current i of the charging pile. max Compare; The maximum allowable output current i of the charging pile is determined as the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile. max The smaller value in the range.

[0046] In application, after obtaining the theoretical maximum output current i0 of the charging pile, it is compared with the maximum DC fast charging current i0 specified by the charging pile hardware specifications. max Comparison, the i max The current capacity is determined by the internal power devices of the charging pile, such as IGBTs or SiC modules, and is a fixed constant. The comparison operation is implemented through the comparator circuit of the controller or software comparison instructions, and the smaller current value is determined as the maximum allowable output current i of the charging pile at the current moment. For example, if the calculated i0 is 300 amps, and i... max If the current is 250 amperes, then the final maximum allowable output current i is 250 amperes.

[0047] This application embodiment adds a final verification step for the charging pile hardware limit current. By comparing the calculated theoretical current with the absolute maximum current allowed by the hardware and taking the minimum value, this step constitutes the final double insurance for the safety protection of the charging pile side. It takes into account both the real-time power output capability of the charging pile and the permanent safety limit of its physical hardware, and prevents the demand current from exceeding the hardware tolerance range due to calculation model errors or instantaneous abnormal operating conditions, thus fundamentally ensuring the safe operation of the charging pile equipment itself.

[0048] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0049] This application also provides a battery fast charging protection device for performing the steps described in the battery fast charging protection method embodiments. The battery fast charging protection device can be a virtual device within an electronic device, run by the electronic device's processor, or it can be the electronic device itself.

[0050] like Figure 3 As shown, the battery fast charging protection device 100 provided in this application embodiment includes: The data acquisition module 101 is used to acquire the current state of charge (SOC) of the battery. The next-moment state of charge calculation module 102 is used to calculate the next-moment state of charge (SOC) based on the current SOC, provided that the preconditions for normal battery charging are met. +1 ; The next-moment maximum fast charging current determination module 103 is used to determine the state of charge (SOC) based on the next moment. +1 Determine the maximum fast charging current I at the next moment. soc ; Theoretical maximum output current determination module 104 is used to obtain the theoretical maximum output current i0 of the charging pile; The maximum output current determination module 105 is used to determine the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile. max By comparing the values, the maximum allowable output current i of the charging pile is determined; The charging current determination module 106 is used to compare the maximum allowable output current i of the charging pile with the maximum fast charging current I at the next moment. soc The smaller value in the equation is determined as the charging current at the next moment.

[0051] In applications, the modules in a battery fast-charging protection device can be software program modules, or they can be implemented through different logic circuits integrated in a processor, or they can be implemented through multiple distributed processors.

[0052] like Figure 4 As shown, this application embodiment also provides an electronic device 200, including: at least one processor 201 ( Figure 4 The diagram shows only one processor, memory 202, and computer program 203 stored in memory 202 and executable on at least one processor 201. When processor 201 executes computer program 203, it implements the steps in the various method embodiments described above.

[0053] In applications, electronic devices may include, but are not limited to, processors and memory. Those skilled in the art will understand that... Figure 4This is merely an example of an electronic device and does not constitute a limitation on the electronic device. It may include more or fewer components than shown, or a combination of certain components, or different components.

[0054] In applications, the processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0055] In applications, memory can be an internal storage unit of an electronic device in some embodiments, such as a hard drive or RAM. In other embodiments, memory can be an external storage device of the electronic device, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, memory can include both internal and external storage units of the electronic device. Memory is used to store operating systems, applications, bootloaders, data, and other programs, such as program code for computer programs. Memory can also be used to temporarily store data that has been output or will be output.

[0056] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0057] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0058] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps described in the various method embodiments above.

[0059] This application provides a computer program product, including a computer program, which, when run on an electronic device, enables the electronic device to perform the steps described in the various method embodiments above.

[0060] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. A computer-readable medium can include at least: any entity or device capable of carrying computer program code to a device / electronic device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electrical carrier signals or telecommunication signals.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0062] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0063] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0064] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0065] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for protecting a battery during fast charging, characterized in that, include: Obtain the battery's current state of charge (SOC); Under the premise that the prerequisites for normal battery charging are met, the next state of charge (SOC) is calculated based on the current SOC. +1 ; Based on the next moment's state of charge (SOC) +1 Determine the maximum fast charging current I at the next moment. soc ; Obtain the theoretical maximum output current i0 of the charging pile; Based on the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile max By comparing the values, the maximum allowable output current i of the charging pile is determined; The maximum allowable output current i of the charging pile is compared with the maximum fast charging current I at the next moment. soc The smaller value in the equation is determined as the charging current at the next moment.

2. The battery fast charging protection method as described in claim 1, characterized in that, Also includes: Obtain the battery's temperature T, charging voltage V, and charging current I; If the current state of charge (SOC) is within a first preset range, the temperature (T) is within a second preset range, the charging voltage (V) is within a third preset range, and the charging current (I) is within a fourth preset range, then the preconditions for normal battery charging are met.

3. The battery fast charging protection method as described in claim 2, characterized in that, The first preset range is SOC min <SOC<SOC max The second preset range is T min <T<T max The third preset range is V min <V<V max The fourth preset range is I. min <I<I max ; Among them, SOC min SOC max These are the minimum and maximum limits for battery state of charge, respectively; T min T max These are the minimum and maximum operating temperatures of the battery, respectively; V min V max These are the minimum and maximum limits of the battery operating voltage, respectively; I min I max These are the minimum and maximum operating current limits for the battery, respectively.

4. The battery fast charging protection method as described in claim 1, characterized in that, The next state of charge (SOC) +1 Calculated using the following formula: SOCIETY +1 =SOC+I×△t; Where △t is the preset signal acquisition and processing time interval.

5. The battery fast charging protection method as described in claim 1 or 4, characterized in that, The state of charge (SOC) based on the next moment +1 Determine the maximum fast charging current I at the next moment. soc ,include: Query the preset battery characteristic lookup table to obtain the battery state of charge (SOC) at the next time step. +1 The corresponding maximum fast charging current I at the next moment soc .

6. The battery fast charging protection method as described in claim 1, characterized in that, The process of obtaining the theoretical maximum output current i0 of the charging pile includes: If the battery's charging voltage V is less than the charging pile's maximum output voltage U max Then the theoretical maximum output current of the charging pile is i0 = P. max / V; If the charging voltage V of the battery is greater than or equal to the maximum output voltage U of the charging pile max Then the theoretical maximum output current of the charging pile is i0 = P. max / U max ; Among them, P max This is the maximum output power of the charging station.

7. The battery fast charging protection method as described in claim 1, characterized in that, The theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile are mentioned. max The comparison determines the maximum allowable output current i of the charging pile, including: The theoretical maximum output current i0 is compared with the maximum DC fast charging current i of the charging pile. max Compare; The maximum allowable output current i of the charging pile is determined as the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile. max The smaller value in the range.

8. A battery fast-charging protection device, characterized in that, include: The data acquisition module is used to acquire the current state of charge (SOC) of the battery. The next-moment state of charge (SOC) calculation module is used to calculate the next-moment state of charge (SOC) based on the current SOC, provided that the preconditions for normal battery charging are met. +1 ; The next-moment maximum fast charging current determination module is used to determine the state of charge (SOC) based on the next moment. +1 Determine the maximum fast charging current I at the next moment. soc ; Theoretical maximum output current determination module, used to obtain the theoretical maximum output current i0 of the charging pile; The maximum output current determination module is used to determine the maximum output current based on the theoretical maximum output current i0 and the maximum DC fast charging current i of the charging pile. max By comparing the values, the maximum allowable output current i of the charging pile is determined; The charging current determination module is used to compare the maximum allowable output current i of the charging pile with the maximum fast charging current I at the next moment. soc The smaller value in the equation is determined as the charging current at the next moment.

9. An electronic device, characterized in that, The device includes a processor, a memory, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the computer program, the electronic device performs the method as described in any one of claims 1-7.

10. A computer program product, characterized in that, Includes a computer program, which, when run, causes the method as described in any one of claims 1-7 to be performed.

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