Battery capacity enhancement method, device, electronic device and storage medium

Abstract

The present application provides a battery capacity improvement method, device, electronic device and storage medium. The method includes: performing multiple pulse discharges on the battery to be treated, so that the state of charge of the battery to be treated after the multiple pulse discharges is reduced to the target state of charge, so as to improve the capacity of the battery to be treated; wherein, the state of charge of the battery to be treated before the multiple pulse discharges is greater than the preset state of charge, the interval time between two adjacent pulse discharges during the multiple pulse discharges is not less than the preset time length, and the battery is in a static state within the time interval between two adjacent pulse discharges during the multiple pulse discharges, and the discharge rate of the multiple pulse discharges is not less than 0.3C. The embodiment of the present application performs multiple pulse discharges on the battery to be treated, and each pulse discharge can create an environment where lithium ions are relatively scarce, so that the lithium dendrite tip is effectively delithiated, thereby improving the battery capacity.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method, device, electronic device and storage medium for improving battery capacity. Background Art

[0002] As lithium-ion batteries are widely used in new energy vehicles, energy storage and other fields, the capacity of battery packs continues to decrease with the increase of usage time, and its safety and cycle stability problems are becoming more and more serious. These two problems can be largely attributed to the continuous growth of lithium dendrites on the lithium negative electrode. Lithium dendrites are branch-like lithium dendrites formed on the surface of the negative electrode during the deposition and precipitation of lithium ions. Dendritic lithium dendrites are one of the important reasons for the loss of battery pack capacity.

[0003] Battery capacity is one of the factors to measure battery health, and how to increase battery capacity has become a technical problem that needs to be solved. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a battery capacity enhancement method, device, electronic device and storage medium for enhancing the battery capacity.

[0005] In a first aspect, an embodiment of the present application provides a method for increasing battery capacity, comprising:

[0006] Performing multiple pulse discharges on the battery to be treated, so that the state of charge of the battery after the multiple pulse discharges is reduced to the target state of charge, so as to improve the capacity of the battery;

[0007] Among them, the charge state of the battery before the multiple pulse discharges is greater than the preset charge state, the interval time between two adjacent pulse discharges during the multiple pulse discharges is not less than the preset duration, and within the time interval between two adjacent pulse discharges during the multiple pulse discharges, the battery is in a static state, and the discharge rate of the multiple pulse discharges is not less than 0.3C.

[0008] The embodiment of the present application performs multiple pulse discharges on the battery to be treated. Each pulse discharge can create an environment where lithium ions are relatively scarce, so that lithium is effectively removed from the tips of lithium dendrites, thereby improving the battery capacity.

[0009] In any embodiment, before performing a plurality of pulse discharges on the battery to be treated, the method further comprises:

[0010] The battery is charged to obtain a battery to be processed; wherein the charging rate is less than the discharging rate.

[0011] The embodiment of the present application charges the battery to a preset state of charge at a relatively small charging rate, so that the state of charge of the battery to be processed reaches a state where it can be discharged, and the risk of lithium plating of the battery during the charging process can also be reduced.

[0012] In any embodiment, during the process of charging the battery, as the state of charge of the battery increases, the charging rate gradually decreases.

[0013] In the embodiment of the present application, during the battery charging process, as the state of charge increases, the charging rate is reduced, thereby reducing the risk of lithium plating.

[0014] In any embodiment, the method further comprises:

[0015] The steps of "charging the battery" and "pulse-discharging the battery to be processed for multiple times" are cyclically executed according to a preset number of cycles.

[0016] The embodiment of the present application can improve the effect of increasing the battery capacity by cycling the battery charging and pulse discharging for multiple times.

[0017] In any embodiment, as the number of cycles increases, the discharge rate gradually increases.

[0018] In the process of improving the battery capacity in the embodiment of the present application, as the number of cycles increases, the discharge rate also gradually increases, which helps to gradually activate and eliminate lithium dendrites and reduce the risk of causing excessive stress to the battery.

[0019] In the embodiment of the present application, after completing a pulse discharge of the battery, the discharged battery is left to stand to reduce the polarization inside the battery.

[0020] In any embodiment, the discharge rate has a value interval of [0.5C, 3C].

[0021] The embodiment of the present application uses a discharge rate to perform pulse discharge on the battery, so that an environment with relatively scarce lithium ions is presented inside the battery, which is conducive to the effective delithiation of the lithium dendrite tips and reduces the risk of lithium dendrites piercing the diaphragm.

[0022] In any embodiment, the charging rate has a value interval of [0.1C, 1 / 3C].

[0023] The embodiment of the present application uses a charging rate to charge the battery, thereby reducing the risk of lithium deposition during the charging process.

[0024] In any embodiment, after completing the capacity improvement of the battery, the method further includes:

[0025] The battery with increased capacity is charged according to the current in the charging current mapping table.

[0026] The embodiment of the present application makes battery charging safer by charging the battery according to the current in the charging current mapping table.

[0027] In a second aspect, an embodiment of the present application provides a battery capacity increasing device, comprising:

[0028] A discharge module, used for performing multiple pulse discharges on the battery to be processed, so that the state of charge of the battery to be processed after the multiple pulse discharges is reduced to a target state of charge, so as to improve the capacity of the battery to be processed;

[0029] Among them, the charge state of the battery to be processed before the multiple pulse discharges is greater than the preset charge state, the interval time between two adjacent pulse discharges during the multiple pulse discharges is not less than the preset duration, and within the time interval between two adjacent pulse discharges during the multiple pulse discharges, the battery is in a static state, and the discharge rate of the multiple pulse discharges is not less than 0.3C.

[0030] In a third aspect, an embodiment of the present application provides an electronic device, including: a processor, a memory, and a bus, wherein:

[0031] The processor and the memory communicate with each other via the bus;

[0032] The memory stores program instructions that can be executed by the processor, and the processor can execute the method of the first aspect by calling the program instructions.

[0033] In a fourth aspect, an embodiment of the present application provides a non-transitory computer-readable storage medium, including:

[0034] The non-transitory computer-readable storage medium stores computer instructions that cause the computer to execute the method of the first aspect.

[0035] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, wherein when the computer program instructions are read and executed by a processor, the method of the first aspect is executed.

[0036] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic diagram of a battery capacity enhancement method provided in an embodiment of the present application;

[0039] Figure 2 A schematic diagram of another method for increasing battery capacity provided in an embodiment of the present application;

[0040] Figure 3 The effect diagram of pulse discharge using different discharge rates provided in the embodiments of the present application;

[0041] Figure 4 Effect diagram of different discharge durations provided in the embodiments of the present application;

[0042] Figure 5 A schematic diagram of the structure of a battery capacity enhancement device provided in an embodiment of the present application;

[0043] Figure 6 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0046] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0047] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0049] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0050] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0051] As lithium-ion batteries are widely used in new energy vehicles, energy storage and other fields, the capacity of battery packs continues to decrease with the increase of usage time. A large part of the capacity loss of most battery packs is caused by lithium plating. With the rise of the new energy second-hand car market and the popularization of battery recycling, how to improve the capacity of battery packs through maintenance through certain technologies and extend the life of battery packs, thereby creating value for all links in the industrial chain, is an urgent problem to be solved.

[0052] In order to improve the battery capacity, the embodiments of the present application provide a method, device, electronic device and storage medium for improving the battery capacity. The method performs multiple pulse discharges on the treated battery, so that each discharge can eliminate the growing lithium dendrites to a certain extent, so that a part of the lithium ions in the lithium dendrites escape and return to the electrolyte, thereby improving the battery capacity.

[0053] It can be understood that the battery capacity enhancement method provided in the embodiments of the present application can not only enhance the capacity of lithium-ion batteries, but also enhance the capacity of sodium-ion batteries, and is applicable to battery systems in which metal ions and metal elements release capacity through redox reactions.

[0054] Figure 1 A schematic diagram of a battery capacity enhancement method provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the method can be applied to capacity enhancement equipment. The method includes:

[0055] Step 101: performing multiple pulse discharges on the battery to be processed, so that the state of charge of the battery to be processed after the multiple pulse discharges is reduced to a target state of charge, so as to improve the capacity of the battery to be processed.

[0056] In the specific implementation process, the discharge rate refers to the current intensity required for the battery to discharge its rated capacity within a specified time. It is numerically equal to a multiple of the rated capacity of the battery, that is, "discharge current / rated capacity of the battery = discharge rate", usually represented by the letter C, such as 1C, 2C, etc. In the embodiment of the present application, the battery is pulse-discharged using a discharge rate, and the discharge rate is not less than 0.3C. In order to improve the effect of improving the battery capacity, it can be set slightly larger, but the safety issues during the battery discharge process need to be considered. Therefore, the discharge rate should not be too large, that is, the range of the discharge rate can be greater than or equal to 0.3C, and less than the maximum rate within the safe range during the battery discharge process, for example, it can be 4C, 4.5C, etc.

[0057] During the multiple pulse discharges, the battery is in a static state within the time interval between two adjacent pulse discharges. In a specific implementation, after a pulse discharge is completed on the battery according to the discharge rate and the preset time, the discharged battery can be left to stand for a period of time. For example, if the preset time is 5 seconds, the static time can be 10 seconds. After the battery is discharged for 5 seconds at the discharge rate, the battery is left to stand for 10 seconds; then the battery is discharged for 5 seconds at the discharge rate, and then left to stand for 10 seconds, and so on. It should be noted that the preset time and the static time can be set according to actual conditions. For example, the preset time can also be 10 seconds, 15 seconds, etc., and the static time can also be 15 seconds, 20 seconds, 30 seconds, etc.

[0058] Pulse usually refers to a pulse-like short-term undulating electrical shock (voltage or current) signal often used in electronic technology, and its main characteristic parameters are waveform, amplitude, width and repetition frequency. Pulse discharge can be understood as applying a short-term discharge to the battery at one time, which is characterized by a static process before and after the discharge. A pulse discharge refers to discharging the battery at the discharge rate, and the discharge duration is not less than the preset duration, such as a discharge duration of not less than 1 second.

[0059] During the discharge of the battery, multiple pulse discharges are used until the battery's state of charge drops to a target state of charge. It is understandable that the battery's state of charge before multiple pulse discharges is greater than a preset state of charge; the preset state of charge may be 90%, or 85%, 80%, etc. The target state of charge is less than the preset state of charge, for example, 5%, 10%, etc.

[0060] After lithium is deposited in the battery, it is discharged at a larger rate (discharge rate). At this time, the electrolyte environment on the surface of the lithium dendrites becomes relatively short of lithium ions. The lithium ions at the tips of the lithium dendrites are more likely to escape and return to the electrolyte, thereby increasing the capacity of the battery.

[0061] It is understandable that the battery to be processed can be a returned battery pack / cell, or a battery that the user is currently using and wants to increase the capacity of the battery.

[0062] The embodiment of the present application performs multiple pulse discharges on the battery to be treated. Each pulse discharge can create an environment where lithium ions are relatively scarce, so that lithium is effectively removed from the tips of lithium dendrites, thereby improving the battery capacity.

[0063] Based on the above embodiment, before performing multiple pulse discharges on the battery to be treated, the method further includes:

[0064] The battery is charged to obtain a battery to be processed; wherein the charging rate of the battery is less than the discharge rate of performing multiple pulse discharges on the battery to be processed.

[0065] In the specific implementation process, the charging rate is used to characterize the current value required to charge the battery to its rated capacity per unit time. Before discharging the battery, if the battery's state of charge has not reached a preset state of charge, the battery can be charged at a charging rate so that the battery's state of charge reaches the preset state of charge after charging.

[0066] Compared with the discharge rate used to discharge the battery, the charge rate is a small rate, that is, the charge rate is less than the discharge rate of the pulse discharge of the battery to be treated. The value range of the charge rate can generally be [0.1C, 1 / 3C]. It should be noted that in the actual charging process, a charge rate slightly smaller than 0.1C or slightly larger than 1 / 3C can also be used.

[0067] The embodiment of the present application charges the battery to a preset state of charge at a relatively small charging rate, so that the state of charge of the battery to be processed reaches a state where it can be discharged, and the risk of lithium plating of the battery during the charging process can also be reduced.

[0068] On the basis of the above embodiment, during the process of charging the battery, as the state of charge corresponding to the battery increases, the charging rate gradually decreases.

[0069] In the specific implementation process, the state of charge of the battery will gradually increase during the charging process. As the state of charge increases, the lithium plating window of the battery cell will narrow sharply. At this time, if the battery continues to be charged at a high rate, the risk of lithium plating will increase. Therefore, when charging the battery, the charging rate decreases as the state of charge increases to reduce the battery capacity loss caused by charging lithium plating. For example: when the battery's state of charge is 5%, the battery can be charged at 1 / 3C, and when the battery's state of charge is 80%, the battery can be charged at 0.1C.

[0070] In the embodiment of the present application, during the battery charging process, as the state of charge increases, the charging rate is reduced, thereby reducing the risk of lithium plating.

[0071] On the basis of the above embodiment, in order to improve the effect of improving the battery capacity, the battery can be charged and discharged multiple times, that is:

[0072] The steps of "charging the battery" and "performing multiple pulse discharges on the battery to be treated" are cyclically executed according to the preset cycle times.

[0073] In the specific implementation process, the number of cycles can be set according to the actual situation, for example, it can be 8 times, 10 times, etc. Therefore, one cycle includes the following steps:

[0074] Charging the battery based on the charging rate so that the state of charge of the battery after charging reaches a preset state of charge;

[0075] The battery is pulse-discharged multiple times using a discharge rate, so that the battery's state of charge after the multiple pulse discharges reaches the target state of charge.

[0076] The embodiment of the present application can continuously eliminate active lithium dendrites in the battery cell and regulate the morphology of lithium precipitation by repeatedly cycling low-rate charging and high-rate pulse discharge. This cyclic operation helps to reduce the heterogeneity inside the battery cell and restore part of the capacity of the battery cell. At the same time, by eliminating lithium dendrites, the risk of thermal runaway of the battery pack is reduced.

[0077] On the basis of the above embodiment, as the number of cycles increases, the discharge rate also gradually increases. For example, in the first few cycles, the discharge rate may be 0.5C, and in the last few cycles, the discharge rate may be increased to 3C.

[0078] The embodiment of the present application can gradually increase the discharge rate according to the response of the battery to be treated. For example, a lower rate (such as 0.5C) is used for the first few cycles, and then gradually increased to 2C or 3C. This method helps to gradually activate and eliminate lithium dendrites while avoiding sudden excessive stress on the battery.

[0079] Based on the above embodiment, after the capacity of the battery is improved, the method further includes:

[0080] The battery with increased capacity is charged according to the current in the charging current mapping table.

[0081] In the specific implementation process, a charging current mapping table is pre-generated, which records the charging current of the battery under different states of charge. Therefore, after the battery capacity is increased, the current corresponding to the battery under the current state of charge can be obtained from the charging current mapping table, and the battery can be charged with this current until the specified state of charge is reached.

[0082] The embodiment of the present application makes battery charging safer by charging the battery according to the current in the charging current mapping table.

[0083] Figure 2 A schematic diagram of another method for increasing battery capacity provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the method includes:

[0084] Step 201: charging status determination; check whether the battery is in a charging state, if so, execute step 202; otherwise, execute step 208;

[0085] Step 202: charge at a low rate to a preset SOC; charge the battery cell / Pack / entire vehicle at a low rate (0.1C~1 / 3C, much smaller than the lithium plating window) to about 90% SOC;

[0086] Step 203: pulse discharge; pulse discharge the battery using a discharge rate X, and the duration of one pulse discharge may be T seconds; wherein X=0.5C-3C; T=1s-10s;

[0087] Step 204: let the battery stand for M seconds after a pulse discharge, where M = 1s-20s;

[0088] Step 205: Determine whether the state of charge of the battery is ≤5%; if so, execute step 206; otherwise, execute step 203;

[0089] Step 206: Whether to loop N times; the value of N is [1-10]; if yes, execute step 207, otherwise execute step 202;

[0090] Step 207: stop discharging, and charge according to the charging current mapping table (mapping table);

[0091] Step 208: Finish drawing the gun.

[0092] Figure 3The effect diagram of pulse discharge using different discharge rates provided in the embodiments of the present application is as follows: Figure 3 In order to achieve a better capacity improvement effect, a high rate pulse is introduced to realize the tip lithium cutting scheme with a rate of no less than 0.5C. Figure 3 It can be seen that the higher the rate, the better the effect, but when the rate reaches 3C, the lithium deposition current density has dropped to a very low level. At this time, further increasing the rate will not improve the lithium deposition much, but will increase the cost (the discharge capacity increases, and the equipment's ability to withstand high currents is required to be higher). Therefore, the pulse discharge rate is preferably 0.5C-3C, and specifically 1C, 2C, etc. should be used. It should be further pointed out that pulse discharge can be either constant current discharge or variable current discharge. For the relative pulse discharge capacity, the constant current discharge scheme has a slight advantage. It should be noted that local CB=0.5 means that the capacity of the cathode active material in the local area of ​​the battery is twice the capacity of the anode active material, so as to quickly manufacture anode lithium deposition, thereby speeding up the evaluation progress.

[0093] Figure 4 The effect diagram of different discharge durations provided in the embodiments of the present application is as follows: Figure 4 As shown in the figure, under the condition of fixed pulse discharge rate, the lithium deposition current density has a certain correlation with the pulse duration. When the pulse duration is 2s, the lithium deposition current density can be reduced by about 50%, and the lithium deposition current density decreases significantly with the increase of pulse duration. When the pulse duration exceeds 10s, if the pulse duration is further increased, the lithium deposition current density will be limited. Therefore, in order to maximize the effect of eliminating lithium deposition, the discharge method can choose a large rate pulse discharge method.

[0094] Therefore, the use of high current pulse discharge can effectively reduce the lithium deposition current density and achieve cutting-edge lithium elimination. The pulse discharge method can be a current selection of 0.5-3C, a single discharge cycle can achieve n discharges (n can be 1 to 1000 times), each discharge lasts 1 to 10 seconds, and the time interval between two pulse discharges is 1 to 30 seconds. It can be performed 1 to 10 times according to the specific lithium deposition situation of the battery.

[0095] Figure 5 This is a schematic diagram of a battery capacity enhancement device provided in an embodiment of the present application. The device may be a module, program segment or code on an electronic device. It should be understood that the device is similar to the above-mentioned Figure 1 The method embodiment corresponds to and can be executed Figure 1 The various steps involved in the method embodiment and the specific functions of the device can be found in the above description. To avoid repetition, detailed description is appropriately omitted here. The device comprises: a discharge module 501; wherein:

[0096] The discharge module 501 is used to perform multiple pulse discharges on the battery to be processed, so that the state of charge of the battery to be processed after the multiple pulse discharges is reduced to the target state of charge, so as to improve the capacity of the battery to be processed;

[0097] Among them, the charge state of the battery to be processed before the multiple pulse discharges is greater than the preset charge state, the interval time between two adjacent pulse discharges during the multiple pulse discharges is not less than the preset duration, and within the time interval between two adjacent pulse discharges during the multiple pulse discharges, the battery is in a static state, and the discharge rate of the multiple pulse discharges is not less than 0.3C.

[0098] Based on the above embodiment, the device further includes a first charging module, which is used to:

[0099] The battery is charged to obtain the battery to be processed; wherein the charging rate of the battery is less than the discharge rate of the battery to be processed subjected to multiple pulse discharges.

[0100] On the basis of the above embodiment, during the charging process of the battery, as the state of charge corresponding to the battery increases, the charging rate gradually decreases.

[0101] On the basis of the above-mentioned embodiment, the device can cyclically execute the steps of "charging the battery" and "performing multiple pulse discharges on the battery to be processed" according to a preset number of cycles.

[0102] On the basis of the above embodiment, as the number of cycles increases, the discharge rate also gradually increases.

[0103] On the basis of the above embodiment, during the charging process of the battery, as the state of charge corresponding to the battery increases, the charging rate gradually decreases.

[0104] Based on the above embodiment, the discharge rate value interval is [0.5C, 3C].

[0105] Based on the above embodiment, the charging rate value interval is [0.1C, 1 / 3C].

[0106] Based on the above embodiment, the device further includes a second charging module, which is used to:

[0107] The battery with increased capacity is charged according to the current in the charging current mapping table.

[0108] Figure 6 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present application, such as Figure 6As shown, the electronic device includes: a processor (processor) 601, a memory (memory) 602 and a bus 603; wherein,

[0109] The processor 601 and the memory 602 communicate with each other via the bus 603;

[0110] The processor 601 is used to call the program instructions in the memory 602 to execute the methods provided by the above-mentioned method embodiments, for example, including: performing multiple pulse discharges on the battery to be processed, so that the charge state of the battery to be processed after the multiple pulse discharges is reduced to the target charge state, so as to improve the capacity of the battery to be processed; wherein, the charge state of the battery to be processed before the multiple pulse discharges is greater than the preset charge state, the interval time between two adjacent pulse discharges during the multiple pulse discharges is not less than the preset time length, and within the time interval between two adjacent pulse discharges during the multiple pulse discharges, the battery is in a static state, and the discharge rate of the multiple pulse discharges is not less than 0.3C.

[0111] The processor 601 may be an integrated circuit chip with signal processing capabilities. The processor 601 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. It may implement or execute various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0112] The memory 602 may include, but is not limited to, random access memory (RAM), read only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.

[0113] This embodiment discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can perform the methods provided by the above method embodiments, for example, including:

[0114] The battery to be processed is subjected to multiple pulse discharges, so that the state of charge of the battery to be processed after the multiple pulse discharges is reduced to the target state of charge, so as to improve the capacity of the battery to be processed; wherein, the state of charge of the battery to be processed before the multiple pulse discharges is greater than the preset state of charge, and the interval time between two adjacent pulse discharges during the multiple pulse discharges is not less than the preset time length, and within the time interval between two adjacent pulse discharges during the multiple pulse discharges, the battery is in a static state, and the discharge rate of the multiple pulse discharges is not less than 0.3C.

[0115] The present embodiment provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions enable the computer to execute the methods provided by the above-mentioned method embodiments, for example, including: performing multiple pulse discharges on the battery to be processed, so that the charge state of the battery to be processed after the multiple pulse discharges is reduced to the target charge state, so as to improve the capacity of the battery to be processed; wherein the charge state of the battery to be processed before the multiple pulse discharges is greater than the preset charge state, the interval time between two adjacent pulse discharges during the multiple pulse discharges is not less than the preset time length, and within the time interval between two adjacent pulse discharges during the multiple pulse discharges, the battery is in a static state, and the discharge rate of the multiple pulse discharges is not less than 0.3C.

[0116] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0117] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0118] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0119] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0120] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for improving battery capacity, characterized in that: include: Performing multiple pulse discharges on the battery to be processed, so that the state of charge of the battery to be processed after the multiple pulse discharges is reduced to a target state of charge, so as to improve the capacity of the battery to be processed; The state of charge of the battery to be processed before the multiple pulse discharges is greater than the preset state of charge, the target state of charge is less than the preset state of charge, the interval between two adjacent pulse discharges during the multiple pulse discharges is not less than the preset duration, the battery is in a static state within the time interval between two adjacent pulse discharges during the multiple pulse discharges, and the discharge rate of the multiple pulse discharges is not less than 0.3C; Before performing multiple pulse discharges on the battery to be treated, the method further comprises: Charging the battery to obtain the battery to be processed; wherein the charging rate of the battery is less than the discharge rate of the battery to be processed subjected to multiple pulse discharges; The discharge rate has a value interval of [0.5C, 3C], and the charge rate has a value interval of [0.1C, 1 / 3C].

2. The method according to claim 1, characterized in that The method further comprises: The steps of "charging the battery" and "performing multiple pulse discharges on the battery to be treated" are cyclically executed according to the preset cycle times.

3. The method according to claim 2, characterized in that As the number of cycles increases, the discharge rate gradually increases.

4. The method according to claim 1, characterized in that: During the charging process of the battery, as the state of charge of the battery increases, the charging rate gradually decreases.

5. The method according to any one of claims 1 to 4, characterized in that: After completing the capacity improvement of the battery, the method further includes: The battery with increased capacity is charged according to the current in the charging current mapping table.

6. A battery capacity enhancement device, characterized in that: include: A discharge module, used for performing multiple pulse discharges on the battery to be processed, so that the state of charge of the battery to be processed after the multiple pulse discharges is reduced to a target state of charge, so as to improve the capacity of the battery to be processed; The state of charge of the battery to be processed before the multiple pulse discharges is greater than the preset state of charge, the target state of charge is less than the preset state of charge, the interval between two adjacent pulse discharges during the multiple pulse discharges is not less than the preset duration, the battery is in a static state within the time interval between two adjacent pulse discharges during the multiple pulse discharges, and the discharge rate of the multiple pulse discharges is not less than 0.3C; The device also includes a first charging module, which is used to: Charging the battery to obtain the battery to be processed; wherein the charging rate of the battery is less than the discharge rate of the battery to be processed subjected to multiple pulse discharges; The discharge rate has a value interval of [0.5C, 3C], and the charge rate has a value interval of [0.1C, 1 / 3C].

7. An electronic device, characterized in that: include: processor, memory and bus, wherein, The processor and the memory communicate with each other via the bus; The memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute the method according to any one of claims 1 to 5.

8. A non-transitory computer-readable storage medium, characterized in that: The non-transitory computer-readable storage medium stores computer instructions, which, when executed by a computer, enable the computer to perform the method according to any one of claims 1 to 5.

9. A computer program product, characterized in that The method comprises computer program instructions, and when the computer program instructions are read and executed by a processor, the method according to any one of claims 1 to 5 is executed.

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