A battery lithium precipitation protection method and device, electronic equipment and storage medium

Abstract

This invention discloses a battery lithium plating protection method, device, electronic device, and storage medium, comprising: acquiring the battery's cycle life and fast charging time in a preset fast charging mode; determining the number of charge-discharge cycles in the preset fast charging mode based on the cycle life and fast charging time; determining the current ratio in a trimmed mode based on the fast charging time, wherein the current ratio in the trimmed mode is lower than the current ratio in the preset fast charging mode; and switching the battery's charging mode from the preset fast charging mode to the trimmed mode based on the number of cycles. By adding a trimmed mode after multiple fast charging modes, lithium plating can be prevented or mitigated. Furthermore, cycle life represents the battery's fast charging cycle performance, and the fast charging time of the preset fast charging mode represents the severity of lithium plating caused by that preset fast charging mode. Combining cycle life and fast charging time to determine the number of charge-discharge cycles in the preset fast charging mode makes the setting of the number of cycles more reasonable and avoids affecting the user experience.

Description

Technical Field

[0001] This invention relates to the field of battery health management technology, and in particular to a battery lithium plating protection method, device, electronic device, and storage medium. Background Technology

[0002] Lithium-ion batteries are widely used in energy storage systems and electric vehicles due to their advantages such as being environmentally friendly, having low pollution, long cycle life, and no memory effect. Given the range anxiety and long charging time that users experience when using electric vehicles, improving fast charging capabilities has become a common development goal for battery manufacturers and vehicle manufacturers.

[0003] Fast charging means using a high-rate current to charge the battery. However, high-rate charging can easily cause lithium plating in the battery cells. As lithium plating accumulates, it will directly lead to a sharp drop in battery capacity retention, and may even puncture the separator, causing an internal short circuit in the battery, seriously affecting battery life and battery safety performance. Summary of the Invention

[0004] This invention provides a method for protecting batteries from lithium plating, in order to solve the problem that lithium plating seriously affects battery life and battery safety performance.

[0005] In a first aspect, the present invention provides a battery lithium plating protection method, comprising:

[0006] Obtain the battery's charge / discharge cycle life and fast charging time in the preset fast charging mode;

[0007] The number of charge / discharge cycles in the preset fast charging mode is determined based on the cycle life and the fast charging time.

[0008] The current ratio in the adjustment mode is determined based on the fast charging time, and the current ratio in the adjustment mode is less than the current ratio in the preset fast charging mode.

[0009] The charging mode of the battery is switched from the preset fast charging mode to the adjustment mode based on the number of cycles.

[0010] Secondly, the present invention provides a battery lithium plating protection device, comprising:

[0011] The data acquisition module acquires the battery's charge-discharge cycle life and fast charging time under the preset fast charging mode;

[0012] The cycle count determination module is used to determine the number of charge and discharge cycles in the preset fast charging mode based on the cycle life and the fast charging time;

[0013] A current ratio determination module is used to determine the current ratio in the adjustment mode based on the fast charging time, wherein the current ratio in the adjustment mode is less than the current ratio in the preset fast charging mode.

[0014] The charging mode conversion module is used to switch the charging mode of the battery from the preset fast charging mode to the adjustment mode according to the number of cycles.

[0015] Thirdly, the present invention provides an electronic device, the electronic device comprising:

[0016] At least one processor; and

[0017] A memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the battery lithium plating protection method according to the first aspect of the present invention.

[0019] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the battery lithium plating protection method described in the first aspect of the present invention.

[0020] The battery lithium plating protection method of this invention obtains the battery's cycle life and fast charging time in a preset fast charging mode; determines the number of charge-discharge cycles in the preset fast charging mode based on the cycle life and fast charging time; then determines the current ratio in a trimmed mode based on the fast charging time, where the current ratio in the trimmed mode is lower than the current ratio in the preset fast charging mode; and switches the battery's charging mode from the preset fast charging mode to the trimmed mode based on the number of cycles. By adding a trimmed mode after multiple fast charging cycles, the current ratio is reduced, which can slow down lithium plating caused by internal battery defects or uneven current density, and can also prevent lithium plating caused by internal material aging and electrolyte consumption in the later stages of battery life, thus extending battery life. Battery cycle performance is improved simply by adjusting the charging mode. Furthermore, cycle life indicates the battery's fast-charging cycle performance, while the fast-charging time of the preset fast-charging mode indicates the severity of lithium plating caused by that preset fast-charging mode. Combining cycle life and fast-charging time determines the number of charge-discharge cycles in the preset fast-charging mode, making the cycle number setting more reasonable. This delays or prevents lithium plating while avoiding affecting the user's experience of using the fast-charging mode.

[0021] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart of a battery lithium plating protection method provided in Embodiment 1 of the present invention;

[0024] Figure 2 This is a flowchart of a battery lithium plating protection method provided in Embodiment 2 of the present invention;

[0025] Figure 3 This is a battery capacity retention rate comparison curve provided in Embodiment 2 of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of a battery lithium plating protection device provided in Embodiment 3 of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the electronic device provided in Embodiment 4 of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] Example 1

[0030] Figure 1 This is a flowchart of a battery lithium plating protection method provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation of battery lithium plating protection. The method can be executed by a battery lithium plating protection device, which can be implemented in hardware and / or software and can be configured in electronic devices.

[0031] Fast charging means charging the battery with a high-rate current. However, high-rate charging easily triggers lithium plating in the battery cells. During continuous cycling, uneven current density within the battery, the consumption of active materials by side reactions, and battery aging exacerbate lithium plating. As lithium plating accumulates, it directly leads to a sharp decline in battery capacity retention, and may even puncture the separator, causing an internal short circuit and posing a safety hazard. However, lithium plating is not irreversible from the beginning. In the early stages of lithium plating, some minor plating can be mitigated or eliminated through certain methods. Therefore, this embodiment uses a battery lithium plating protection method to prevent or slow down lithium plating, effectively improving battery cycle performance.

[0032] like Figure 1 As shown, the battery lithium plating protection method includes:

[0033] S101. Obtain the battery's charge / discharge cycle life and fast charging time in the preset fast charging mode.

[0034] The battery in this embodiment is a lithium battery. Generally, when the battery capacity retention rate drops to a preset percentage, such as 80%, the battery life is considered to have ended. The number of charge-discharge cycles the battery has undergone before its life ends is called the cycle life. The cycle life can be obtained based on the battery's cycle performance parameters. Cycle performance is one of the standard parameters of a battery. For example, a battery's cycle performance of 80% SOH, 2000 cycles @ 25℃, 1C / 1C means that the battery can be cycled at least 2000 times at 25℃ with 1C charging and 1C discharging. Therefore, the cycle life can be determined to be 2000 cycles. For different batteries of the same model, their cycle life is relatively fixed. Therefore, the cycle life of the current battery can be referenced from the cycle life of batteries of the same model.

[0035] For preset fast charging modes, the fast charging time is relatively fixed. When a preset fast charging mode is selected, the corresponding fast charging time can be determined. Specifically, you can query the fast charging strategy corresponding to the preset fast charging mode. The fast charging strategy includes the current ratio. The fast charging time of the battery in the preset fast charging mode is determined based on the current ratio. When the current ratio during charging is 1C, it means that the fast charging time is 1 hour.

[0036] It's important to note that battery capacity continuously decreases during use. Batteries are typically installed in electric vehicles, such as electric cars, which usually have a battery management system (BMS). This BMS can adjust the charging current to match the battery capacity, thus maintaining a consistent fast-charging time. For example, with a 1000mAh battery, a 1000mA charging current results in a 1-hour fast-charging time and a 1C charging rate. When the battery capacity drops to 900mAh, the charging current is adjusted to 900mA, the fast-charging time remains 1 hour, and the charging rate is still 1C.

[0037] Fast charging time generally refers to the charging time of a battery at 10% SOC-80% SOC.

[0038] S102. Determine the number of charge and discharge cycles in the preset fast charging mode based on the cycle life and fast charging time.

[0039] The preset number of charge / discharge cycles in fast charging mode means that after the battery completes the preset number of fast charging / discharging cycles, it will undergo at least one adjustment mode charge / discharge cycle. It should be understood that one charge and one discharge constitute one cycle. Users generally prefer to avoid using the adjustment mode. While adjusting the charge / discharge cycle can protect the battery from lithium plating, it balances user experience and lithium plating protection. For example, if battery A has a cycle life of 2000 cycles and a preset fast charging time of 30 minutes, setting a adjustment mode charge after every 10 fast charging cycles might provide good lithium plating protection, but it could be too frequent for users, negatively impacting the fast charging experience. Furthermore, since battery A has a long cycle life, indicating good cycle performance, frequent adjustment charging is unnecessary.

[0040] A longer cycle life means better battery cycle performance, allowing for more cycles in fast charging mode. Therefore, fast charging time is positively correlated with cycle life; that is, the longer the cycle life, the more charge-discharge cycles are allowed in fast charging mode, and the shorter the cycle life, the fewer charge-discharge cycles are allowed in fast charging mode.

[0041] On the other hand, a shorter fast charging time can easily lead to severe lithium plating in the battery, which requires reducing the number of fast charging cycles. Therefore, fast charging time is negatively correlated with the number of cycles. That is, the shorter the fast charging time, the fewer the number of charge-discharge cycles allowed in the fast charging mode, and the longer the fast charging time, the more the number of charge-discharge cycles allowed in the fast charging mode.

[0042] Cycle life indicates the battery's fast-charging cycle performance, while the fast-charging time of the preset fast-charging mode indicates the severity of lithium plating caused by that preset fast-charging mode. Combining cycle life and fast-charging time determines the number of charge-discharge cycles in the preset fast-charging mode, making the cycle number setting more reasonable. This delays or prevents lithium plating while avoiding affecting the user's experience of using the fast-charging mode.

[0043] S103. Determine the current ratio in the trim mode based on the fast charging time.

[0044] The current rate in the adjustment mode is lower than that in the preset fast charging mode. It should be noted that the current rate here refers to the current rate during charging and discharging.

[0045] In the preset fast charging time-adjustment current ratio table, determine the adjustment current ratio corresponding to the fast charging time, and use it as the current ratio of the battery in adjustment mode.

[0046] It should be noted that the execution order of S102 and S103 can be interchanged, and this embodiment does not impose any restrictions on this.

[0047] S104. Based on the number of cycles, switch the battery charging mode from the preset fast charging mode to the adjustment mode.

[0048] The number of cycles refers to the number of cycles in fast charging mode. After the battery has undergone this number of charge-discharge cycles in fast charging mode, the battery's charging mode can be switched from the preset fast charging mode to the adjustment mode.

[0049] The battery lithium plating protection method of this invention obtains the battery's cycle life and fast charging time in a preset fast charging mode; determines the number of charge-discharge cycles in the preset fast charging mode based on the cycle life and fast charging time; then determines the current ratio in a trimming mode based on the fast charging time, where the current ratio in the trimming mode is lower than the current ratio in the preset fast charging mode; and finally, switches the battery's charging mode from the preset fast charging mode to the trimming mode based on the number of cycles. By adding a trimming mode after multiple fast charging cycles, the current ratio is reduced, which can slow down lithium plating caused by internal battery defects or uneven current density. It can also prevent lithium plating caused by internal material aging and electrolyte consumption in the later stages of battery life, extending battery life. Moreover, it improves battery cycle performance by adjusting the charging mode without disassembling the battery. Furthermore, cycle life indicates the battery's fast-charging cycle performance, while the fast-charging time of the preset fast-charging mode indicates the severity of lithium plating caused by that preset fast-charging mode. Combining cycle life and fast-charging time determines the number of charge-discharge cycles in the preset fast-charging mode, making the cycle number setting more reasonable. This delays or prevents lithium plating while avoiding affecting the user's experience of using the fast-charging mode.

[0050] Example 2

[0051] Figure 2 This is a flowchart of a battery lithium plating protection method provided in Embodiment 2 of the present invention. This embodiment of the present invention is an optimization based on Embodiment 1 described above, such as... Figure 2 As shown, the battery lithium plating protection method includes:

[0052] S201. Obtain the cycle life and fast charging time of the battery under the preset fast charging mode.

[0053] The cycle life is the number of charge-discharge cycles that a battery experiences before it reaches the end of its life. In this embodiment, the cycle life can be obtained by detecting the cycle life of batteries of the same model as the current battery. The cycle life can be obtained in the following ways:

[0054] Charge the battery using the preset fast charging mode and discharge the battery; increase the cycle life by 1; record the battery capacity retention rate; determine if the capacity retention rate is less than the preset capacity threshold; if yes, use the current cycle life as the cycle life of the battery in the preset fast charging mode; if no, return to the steps of charging the battery using the preset fast charging mode and discharging the battery.

[0055] The preset capacity threshold is generally 80%, and the capacity retention rate is (Cn / C1)*100, where Cn is the discharge capacity of the battery after the nth fast charge and C1 is the discharge capacity of the battery after the first fast charge.

[0056] For the preset fast charging mode, the fast charging time is relatively fixed. In this embodiment, the fast charging time of the current battery can be obtained by detecting the fast charging time of batteries of the same model and batch. The fast charging time can be obtained in the following ways:

[0057] When the battery is charging in the preset fast charging mode, the time required for each charge is recorded; the average time required for each charge is calculated to obtain the fast charging time of the battery in the preset fast charging mode.

[0058] The fast charging time of the current battery can be obtained by testing the fast charging time of batteries of the same model and batch. This reduces the differences between different batches of batteries, avoids errors caused by directly using standard parameters, and makes the fast charging time more accurate.

[0059] S202. In the preset cycle life-cycle number interval table, determine the cycle number interval corresponding to the cycle life as the first interval of the charge and discharge cycle number in the preset fast charging mode.

[0060] S203. In the preset fast charging time-cycle number interval table, determine the cycle number interval corresponding to the fast charging time, and use it as the second interval of the cycle number.

[0061] The preset cycle life-cycle count range table and the preset fast charging time-cycle count range table can both be obtained based on historical data of the same model. Specifically, the number of cycles is directly proportional to the cycle life and inversely proportional to the fast charging time.

[0062] S204. Take the intersection of the first interval and the second interval as the target interval for the number of iterations.

[0063] The first interval represents the number of cycles considering only cycle life, and the second interval represents the number of cycles considering only fast charging time. The intersection of the first and second intervals yields the target interval for the number of cycles. This approach, while simultaneously satisfying the constraints of cycle life and fast charging time, makes the setting of the number of cycles more reasonable. The target interval, being the intersection of the two intervals, narrows the range of both intervals and provides a more precise target interval for the number of cycles, making it more valuable for reference than the first or second intervals alone. For example, if the first interval is [50, 100] and the second interval is [30, 80], then the intersection of the two intervals is [30, 50], which is the target interval for the number of cycles.

[0064] S205. Calculate the midpoint of the target interval to obtain the number of iterations.

[0065] If the target range for the number of iterations is [30, 50], then the number of iterations is 40.

[0066] S206. Determine the current ratio in the trim mode based on the fast charging time.

[0067] In the adjustment mode, the current multiplier is lower than that in the preset fast charging mode.

[0068] You can determine the adjustment current ratio corresponding to the fast charging time from the preset fast charging time-adjustment current ratio table, which will serve as the current ratio of the battery in adjustment mode. The current ratio in adjustment mode is inversely proportional to the fast charging time.

[0069] The preset fast charging time-adjustment current rate table can be obtained from standard parameters of the same battery model, or from historical data of the same battery model. For example, it can be adjusted with different adjustment rates for the same fast charging time.

[0070] S207. When the battery is charged and discharged in fast charging mode, the number of charge and discharge cycles is accumulated.

[0071] S208. When the number of charge / discharge cycles reaches the set number, the battery charging mode is switched from the preset fast charging mode to the adjustment mode, and the number of charge / discharge cycles is reset to zero.

[0072] The cycle count refers to the number of charge and discharge cycles performed in fast charging mode between activating fast charging mode and activating conditioning mode. Therefore, when the charge and discharge cycle count is reached, the battery charging mode is switched from the preset fast charging mode to conditioning mode to condition the battery, delay or prevent lithium plating, and the charge and discharge cycle count is reset to zero to prepare for the next fast charging cycle.

[0073] S209. After the battery has been charged and discharged a preset number of times in the adjustment mode, the charging mode of the battery is switched from the preset adjustment mode to the fast charging mode.

[0074] The preset number of adjustments can be an integer from 1 to 3. After executing S209, return to S207.

[0075] The battery lithium plating protection method of this invention uses the intersection of a first interval and a second interval as the target interval for the number of cycles. The first interval is the interval for the number of cycles obtained by considering only the cycle life, and the second interval is the interval for the number of cycles obtained by considering only the fast charging time. The target interval for the number of cycles is obtained by using the intersection of the first interval and the second interval. Under the constraints of cycle life and fast charging time, the setting of the number of cycles is more reasonable. The target interval is the intersection of the two intervals. By narrowing the range of the target interval, a more accurate number of cycles can be obtained based on the target interval.

[0076] To further illustrate the technical advantages of the battery lithium plating method, the battery lithium plating method of the present invention was verified. The verification process is as follows:

[0077] The preset fast charging regime at 25℃ is set as follows: 10-80% SOC charging time is 35 minutes.

[0078] Comparative Example: The battery underwent fast charge cycle testing at 25°C according to the following procedure:

[0079] 1.1 Charge the battery using the 25℃ fast charging method until it reaches 100% SOC;

[0080] 1.2. Let stand for 30 minutes;

[0081] 1.3 The battery is discharged to 2.5V at a current of 1C. The capacity of the first discharge is C1, and the capacity of the nth discharge is Cn.

[0082] 1.4. Let stand for 30 minutes;

[0083] 1.5 Repeat steps 1.1-1.4;

[0084] 1.6 Calculate the capacity retention rate = Cn / C1 * 100%, and plot the cycle number - capacity retention rate curve as shown below. Figure 3 As shown.

[0085] Embodiment of the present invention: The battery was subjected to fast charging cycle testing at 25°C according to the following procedure:

[0086] 2.1 Charge the battery using the 25℃ fast charging method until it reaches 100% SOC;

[0087] 2.2 Let stand for 30 minutes;

[0088] 2.3 The battery is discharged to 2.5V at a current of 1C. The capacity of the first discharge is C1, and the capacity of the nth discharge is Cn.

[0089] 2.4. Let stand for 30 minutes;

[0090] 2.5 Repeat steps 2.1-2.4 50 times;

[0091] 2.6 Charge the battery at a constant current of 0.33C to 3.65V, then let it stand for 30 minutes;

[0092] 2.7 Discharge the battery at a constant current of 0.33C to 2.5V, and let it stand for 30 minutes;

[0093] 2.8. Repeat steps 2.1-2.7; calculate capacity retention rate = Cn / C1*100%, and plot the cycle number-capacity retention rate curve, as shown below. Figure 3 As shown, steps 2.6-2.7 are not included in the loop count.

[0094] Around 500 cycles, differences began to appear between the comparative and exemplary cases. Disassembly and analysis of the battery after 500 cycles revealed visible lithium plating in localized areas in the comparative case; however, the exemplary case, due to periodic charging adjustments, showed no lithium plating. Continuing cycling, the comparative case showed accelerated capacity decay due to lithium plating, reaching an EOL (80% capacity retention) of 1200 cycles. While the exemplary case also showed a slight acceleration in capacity decay around 1000 cycles, the decay rate was smaller than that of the comparative case, and the inflection point was more gradual, resulting in a final cycle life of 1500 cycles, a 25% increase in cycle count.

[0095] By comparing the embodiments of the present invention with comparative examples, it is verified that the battery lithium plating protection method of the present invention can effectively delay battery lithium plating and extend battery life.

[0096] Example 3

[0097] Figure 4 This is a schematic diagram of a battery lithium plating protection device provided in Embodiment 3 of the present invention. Figure 4As shown, the battery lithium plating protection device includes:

[0098] The data acquisition module 401 acquires the battery's charge-discharge cycle life and fast charging time in a preset fast charging mode;

[0099] The cycle count determination module 402 is used to determine the number of charge and discharge cycles in the preset fast charging mode based on the cycle life and the fast charging time;

[0100] The current ratio determination module 403 is used to determine the current ratio in the adjustment mode based on the fast charging time, wherein the current ratio in the adjustment mode is less than the current ratio in the preset fast charging mode.

[0101] The charging mode conversion module 404 is used to convert the charging mode of the battery from the preset fast charging mode to the adjustment mode according to the number of cycles.

[0102] In an optional embodiment of the present invention, the cycle life is obtained in the following manner:

[0103] The battery is charged using a preset fast charging mode, and the battery is also discharged.

[0104] Increase cycle life by 1;

[0105] Record the capacity retention rate of the battery;

[0106] Determine whether the capacity retention rate is less than a preset capacity threshold;

[0107] If so, the current cycle life is taken as the cycle life of the battery in the preset fast charging mode;

[0108] If not, return to the steps of charging the battery in the preset fast charging mode and discharging the battery.

[0109] In an optional embodiment of the present invention, the fast charging time is obtained in the following manner:

[0110] When the battery is charged in a preset fast charging mode, the time required for each charge is recorded;

[0111] Calculate the average time required for each charge to obtain the fast charging time of the battery in the preset fast charging mode.

[0112] In an optional embodiment of the present invention, the loop count determination module 402 includes:

[0113] The first interval determination submodule is used to determine the cycle number interval corresponding to the cycle life in the preset cycle life-cycle number interval table, and use it as the first interval of the charge and discharge cycle number in the preset fast charging mode.

[0114] The second interval determination submodule is used to determine the cycle number interval corresponding to the fast charging time in the preset fast charging time-cycle number interval table, and use it as the second interval of the charge and discharge cycle number in the preset fast charging mode.

[0115] The target interval determination submodule is used to take the intersection of the first interval and the second interval as the target interval for the number of iterations;

[0116] The loop count determination submodule is used to calculate the midpoint of the target interval to obtain the loop count.

[0117] In an optional embodiment of the present invention, the current ratio determination module 403 includes:

[0118] The current ratio determination submodule is used to determine the adjustment current ratio corresponding to the fast charging time from a preset fast charging time-adjustment current ratio table, and use it as the current ratio of the battery in adjustment mode.

[0119] In an optional embodiment of the present invention, the charging mode conversion module 404 includes:

[0120] The charge / discharge count accumulation submodule is used to accumulate the charge / discharge count when the battery is charged and discharged in fast charging mode;

[0121] The charging mode conversion submodule is used to switch the battery's charging mode from the preset fast charging mode to the adjustment mode and reset the charge / discharge count to zero when the number of charge / discharge cycles reaches the set number.

[0122] In an optional embodiment of the present invention, the battery lithium plating protection device further includes:

[0123] The fast charging conversion module is used to switch the charging mode of the battery from the preset adjustment mode to the fast charging mode after the battery has been charged and discharged a preset number of times in the adjustment mode, and return to the step of accumulating the number of charge and discharge cycles when the battery is being charged and discharged in the fast charging mode.

[0124] The battery lithium plating protection device provided in the embodiments of the present invention can execute the battery lithium plating protection method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0125] Example 4

[0126] Figure 5A schematic diagram of an electronic device 40 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0127] like Figure 5 As shown, the electronic device 40 includes at least one processor 41 and a memory, such as a read-only memory (ROM) 42 or a random access memory (RAM) 43, communicatively connected to the at least one processor 41. The memory stores computer programs executable by the at least one processor. The processor 41 can perform various appropriate actions and processes based on the computer program stored in the ROM 42 or loaded into the RAM 43 from storage unit 48. The RAM 43 may also store various programs and data required for the operation of the electronic device 40. The processor 41, ROM 42, and RAM 43 are interconnected via a bus 44. An input / output (I / O) interface 45 is also connected to the bus 44.

[0128] Multiple components in electronic device 40 are connected to I / O interface 45, including: input unit 46, such as keyboard, mouse, etc.; output unit 47, such as various types of monitors, speakers, etc.; storage unit 48, such as disk, optical disk, etc.; and communication unit 49, such as network card, modem, wireless transceiver, etc. Communication unit 49 allows electronic device 40 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0129] Processor 41 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 41 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 41 performs the various methods and processes described above, such as battery lithium plating protection methods.

[0130] In some embodiments, the battery lithium plating protection method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 48. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 40 via ROM 42 and / or communication unit 49. When the computer program is loaded into RAM 43 and executed by processor 41, one or more steps of the battery lithium plating protection method described above may be performed. Alternatively, in other embodiments, processor 41 may be configured to perform the battery lithium plating protection method by any other suitable means (e.g., by means of firmware).

[0131] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0132] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0133] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0134] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0135] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0136] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0137] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0138] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A battery lithium plating protection method, characterized in that, include: Obtain the battery's charge / discharge cycle life and fast charging time in the preset fast charging mode; The number of charge / discharge cycles in the preset fast charging mode is determined based on the cycle life and the fast charging time. The cycle count refers to the number of battery charge and discharge cycles during each cycle of switching from the preset fast charging mode to the adjustment mode. The current ratio in the adjustment mode is determined based on the fast charging time, and the current ratio in the adjustment mode is less than the current ratio in the preset fast charging mode. The charging mode of the battery is switched from the preset fast charging mode to the adjustment mode according to the number of cycles. The step of determining the number of charge / discharge cycles in the preset fast charging mode based on the cycle life and the fast charging time includes: In the preset cycle life-cycle count interval table, the cycle count interval corresponding to the cycle life is determined as the first interval of the charge and discharge cycle count in the preset fast charging mode; In the preset fast charging time-cycle number interval table, the cycle number interval corresponding to the fast charging time is determined as the second interval of the charging and discharging cycle number in the preset fast charging mode; The intersection of the first interval and the second interval is taken as the target interval for the number of iterations; The number of iterations is obtained by calculating the midpoint of the target interval.

2. The method as described in claim 1, characterized in that, The cycle life is obtained in the following manner: The battery is charged using a preset fast charging mode, and the battery is also discharged. Increase cycle life by 1; Record the capacity retention rate of the battery; Determine whether the capacity retention rate is less than a preset capacity threshold; If so, the current cycle life is taken as the cycle life of the battery in the preset fast charging mode; If not, return to the steps of charging the battery in the preset fast charging mode and discharging the battery.

3. The method as described in claim 1, characterized in that, The fast charging time is obtained through the following method: When the battery is charged in a preset fast charging mode, the time required for each charge is recorded; Calculate the average time required for each charge to obtain the fast charging time of the battery in the preset fast charging mode.

4. The method as described in claim 1, characterized in that, Determining the current rate of the battery in the trim mode based on the fast charging time includes: In the preset fast charging time-adjustment current ratio table, the adjustment current ratio corresponding to the fast charging time is determined as the current ratio of the battery in adjustment mode.

5. The method according to any one of claims 1 to 4, characterized in that, The step of switching the battery charging mode from the preset fast charging mode to the adjustment mode based on the number of cycles includes: When the battery is charged and discharged in fast charging mode, the number of charge and discharge cycles is accumulated. When the number of charge-discharge cycles is reached, the charging mode of the battery is switched from the preset fast charging mode to the adjustment mode, and the number of charge-discharge cycles is reset to zero.

6. The method as described in claim 5, characterized in that, After switching the battery's charging mode from the preset fast charging mode to the adjustment mode, the method further includes: After the battery has been charged and discharged a preset number of times in the adjustment mode, the charging mode of the battery is switched from the preset adjustment mode to the fast charging mode, and the process returns to the step of accumulating the number of charge and discharge cycles when the battery is being charged and discharged in the fast charging mode.

7. A battery lithium plating protection device, characterized in that, The battery lithium plating protection method for performing any one of claims 1-6 includes: The data acquisition module acquires the battery's charge-discharge cycle life and fast charging time under the preset fast charging mode; The cycle count determination module is used to determine the number of charge and discharge cycles in the preset fast charging mode based on the cycle life and the fast charging time; A current ratio determination module is used to determine the current ratio in the adjustment mode based on the fast charging time, wherein the current ratio in the adjustment mode is less than the current ratio in the preset fast charging mode. The charging mode conversion module is used to switch the charging mode of the battery from the preset fast charging mode to the adjustment mode according to the number of cycles.

8. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the battery lithium plating protection method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the battery lithium plating protection method according to any one of claims 1-6.

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