679results about How to "Increase storage capacity" patented technology

The invention discloses a block chain-based data storage optimization method. The method comprises the following steps of 1, establishing a storage strategy and a continuous mechanism for optimizing storage; 2, according to a storage strategy, calculating storage cost caused by monitoring real-time change of a storage amount statistical value and storage resource allocation service calculation; 3, continuously optimizing data storage in the whole data life cycle by utilizing the object label and the life cycle strategy; step 4, synchronizing transfer optimization of the data storage layer based on the access frequency of the data storage block; the method is applied to a data storage optimization system based on the block chain, the system comprises a storage strategy mechanism module, a storage cost calculation module and a data storage optimization module, in cloud storage, an intermediate data set is used for carrying out storage layer conversion decision making on data through the change of access frequency, and the cloud storage cost is saved. The method has the characteristics of improving storage performance and reducing storage cost.

The invention provides a semiconductor equipment data acquisition method and a semiconductor equipment data acquisition system supporting standardized communication transformation, which are used for realizing data acquisition and process control on different types of semiconductor equipment, formulating corresponding communication rules for equipment conforming to a communication standard, and converting an equipment communication protocol by a cluster system so as to match a standard interface. For equipment which does not completely meet the standard but can realize communication through programming, the trunking system directly acquires required data and converts the required data to meet the standard interface specification. For equipment without communication capability, data is acquired through an equipment interface by adopting an image recognition technology, data input and function operation are realized through simulating keyboard and mouse operation, and finally, protocol conversion from data to a standard interface is completed by a cluster equipment control system. And the equipment data is converted into a message data packet conforming to a standard semiconductor equipment communication interface, so that docking with a semiconductor equipment data analysis and process control system is realized, and the production efficiency and quality of the semiconductor equipment are improved.

The invention discloses a data storage method based on a solid state disk and a storage medium, relates to the technical field of solid state disks, and solves the problem that the storage rate cannot reach the optimal state due to the fact that the storage process and historical data of data are not analyzed. According to the method, different classified data are confirmed, the optimal utilization rate and the related storage rate are identified from the historical data of the different classified data, and the classified data are uniformly distributed and stored based on the corresponding utilization rate in the subsequent storage process, so that the specific storage rate and the overall storage effect of the corresponding classified data are guaranteed. By analyzing the storage rate associated with the related storage process, whether the storage rate is reduced or not is identified, and if the storage rate is reduced, utilization rate allocation is performed from other storage paths to guarantee the overall storage rate of the corresponding storage process, so that the corresponding storage rate is further improved.

The invention discloses a blockchain-based intelligent video monitoring data storage security sharing method for an iron and steel plant. The method comprises the following steps of: generating a public key PKS and a master key TMK based on an attribute encryption algorithm; distributing shares of the shared key S by constructing a matrix and defining a function, wherein the shares are distributed in different rows of the matrix; re-encrypting the data by using a hybrid proxy re-encryption algorithm based on a ciphertext strategy; secure data storage and access control are realized based on a secure storage mode of revocable attribute-based encryption RABE and a block chain; and in combination with a block chain technology, a consensus algorithm is adopted to verify transactions, so that the security and robustness of the system are enhanced. According to the invention, the utilization rate of the data is improved, the cooperation efficiency is enhanced, the security and transparency of the video monitoring data are improved, and the cost of information transmission and storage is reduced. The distributed storage and access control of the data are realized, the confidentiality and integrity of the cloud center data are ensured, and the security and efficiency of the steel plant video monitoring system in the storage and transmission process are enhanced.

The invention discloses a lithium salt doped porous carbon coated graphite composite material for an energy storage battery and a preparation method thereof, the composite material has a core-shell structure, the core is graphite, and the shell is a lithium salt doped porous carbon complex. The preparation method comprises the following steps: uniformly mixing amino resin, a pore-forming agent and a heteroatom compound of the pore-forming agent, curing, activating to obtain porous carbon, adding the porous carbon into an inorganic lithium salt, uniformly mixing, and carrying out spray drying to obtain lithium salt doped porous carbon; the preparation method comprises the following steps: adding lithium salt doped porous carbon into a carboxymethyl cellulose lithium solution, uniformly dispersing, then adding into a graphite material, uniformly dispersing, spray-drying, and carbonizing to obtain the lithium salt doped porous carbon coated graphite composite material. According to the obtained material, the coating layer lithium salt is doped with porous carbon, so that the liquid absorption and retention capacity of the material is improved, the diffusion rate of lithium ions is increased, and the rate capability is improved; meanwhile, the expansion of the composite material in the charging and discharging process is reduced by utilizing the low expansion of the porous carbon, and the cycle performance is improved.

The invention belongs to the field of new energy materials and devices, and particularly discloses nitrogen self-doped phenolic resin-based hard carbon microspheres and a preparation method and application thereof.The preparation method comprises the following steps that nitrogen-containing phenol monomers, aldehyde monomers and a basic catalyst are mixed according to a certain sequence, and after prepolymerization is conducted at the low temperature, the nitrogen self-doped phenolic resin-based hard carbon microspheres are obtained; carrying out high-temperature hydrothermal reaction to obtain phenolic resin microspheres; and sequentially carrying out low-temperature carbonization treatment and high-temperature carbonization treatment to obtain the nitrogen self-doped phenolic resin-based hard carbon microspheres. Compared with the existing nitrogen-doped resin hard carbon preparation method, the nitrogen-self-doped phenolic resin hard carbon has the advantages that a nitrogen source is introduced into the phenolic resin hard carbon from the source end of the resin, the production process is simplified, and uniform distribution and atomic-scale doping of the nitrogen element are realized. The material is used for sodium ion batteries, has excellent long cycle stability, good rate capability and high specific capacity, and has industrial application prospects.

The track fastener storage device comprises an outer barrel support assembly and an inner barrel assembly which are concentrically arranged from outside to inside, and the inner barrel assembly is of a circular rotating array structure and is used for storing track fasteners to be scattered; the inner cylinder rotating mechanism is rotatably arranged between the outer cylinder bracket assembly and the inner cylinder assembly, can drive the inner cylinder assembly to rotate relative to the outer cylinder bracket assembly, and is used for rotating the track fastener to the position of the discharge port; the turnover mechanism is arranged at the side part of the outer cylinder bracket assembly and is used for providing power for the turnover of the outer cylinder bracket assembly and the inner cylinder assembly; and the discharging port opening and closing mechanism is arranged at the bottom of the inner cylinder assembly and used for controlling the rail fasteners to fall onto the material distributing device, and the discharging port is a feeding port at the same time. The technical problems that an existing material storage device is low in operation efficiency and small in storage capacity and cannot meet the continuous operation requirement can be solved.

The invention relates to the technical field of steel heat treatment, and particularly discloses a heat treatment process for refining C250 maraging steel grains. The heat treatment technology for refining the C250 maraging steel grains comprises the following steps that firstly, heat preservation is conducted on C250 maraging steel at the temperature of 945-955 DEG C for 1-1.5 h, and water cooling is conducted to the room temperature; then preserving heat for 1-1.5 hours at the temperature of 925-935 DEG C, and performing water cooling to room temperature; then preserving heat for 1-1.5 hours at the temperature of 895-905 DEG C, and performing water cooling to room temperature; and finally, preserving heat for 1-1.5 hours at the temperature of 815-825 DEG C, and air-cooling to room temperature. According to the heat treatment technology for refining the C250 maraging steel grains, the C250 maraging steel grains can be fully refined and homogenized, the C250 maraging steel grains reach the grade 8-9, and the C250 maraging steel grains have the excellent mechanical property.

The invention relates to the technical field of carbon burying and utilization, and particularly discloses a method for increasing the carbon dioxide burying amount by using a gas-soluble foaming agent. The gas-soluble foaming agent is adopted, in-situ foaming can be achieved through formation water, the carbon storage space is increased, and the dynamic stability effect can be achieved after foam is broken; in-situ foaming is realized around a shaft through segmented alternate injection of a front gas-soluble foaming agent slug and a rear CO2 slug; by setting a real-time injection pressure feedback mechanism and dynamically adjusting the injection mode, early breakthrough and loss of carbon dioxide are reduced, the sealing efficiency is remarkably improved, and the burying effect of carbon dioxide is effectively improved.

The invention relates to the technical field of forest tending, in particular to a structure regulation and control method for a pinus yunnanensis low-efficiency forest. The pinus yunnanensis low-efficiency forest structure regulation and control method comprises the following steps that ecological thinning is conducted on a pinus yunnanensis low-efficiency forest region, broad-leaved trees are planted in an intermediate cutting zone in a complementary mode according to the mixing proportion of 30% or below, and pinus yunnanensis lateral branches are pruned. According to the structure regulation and control method, good growth of the Yunnan pine forest is promoted, the diameter order range of the forest stand is expanded, the forest stand is converted into a needle-broad mixed different-age forest stand, the forest stand is gradually transited to random distribution or cluster distribution, the complexity and diversity of a natural ecological system can be better reflected, optimization of a forest stand space structure is promoted, and the economic benefit is increased. And a condition and a basis are provided for realizing a multifunctional effect of the forest.

The invention provides a flash memory classification method and a storage chip, and belongs to the technical field of storage. The data storage method comprises the following steps of: reading, writing and erasing a flash memory for multiple times at a preset temperature; scoring a plurality of performance parameters when each flash memory block is read, written and erased; multiplying the score of each performance parameter by the weight, and adding the products of the scores and the weights of all the performance parameters to obtain the total score of the performance parameters of each flash memory block; according to the performance parameter total score of each flash memory block, dividing the flash memory block into a good block, a bad block and a weak block; wherein the total score of the performance parameters of the weak blocks is larger than the total score of the performance parameters of the bad blocks, the total score of the performance parameters of the weak blocks is smaller than the total score of the performance parameters of the good blocks, and the bad blocks are used as single-layer storage units. According to the flash memory classification method and the data storage system provided by the invention, the storage capacity of the storage chip can be improved.

The invention provides an object metadata storage method and device, electronic equipment and a storage medium. At least two storage buckets in the object storage system correspond to the same storage space, the storage space is divided into N storage partitions, and each storage partition corresponds to at least one storage medium. Through the method provided by the invention, a plurality of object metadata to be stored in one storage bucket can be uniformly stored in the storage space (namely the storage medium) corresponding to each storage partition, so that the object metadata in the same storage bucket can be stored across the storage medium and is not limited by the storage capacity of a single storage medium any more, and the storage efficiency is improved. Therefore, the object metadata storage capacity of the single bucket is improved.

The invention discloses an emergency training platform database dynamic management method and device and a storage medium, and relates to the technical field of database dynamic management, and the method comprises the following steps: carrying out the grading processing of files in a database according to the file size, and carrying out the encryption uplink processing after the grading processing is completed; establishing a user credible value calculation model, and dividing the access control authority; performing access management on the emergency training platform database based on the user credible value, the confidentiality level and the user level; the method and the device are used for solving the problem that in the prior art, files of different sizes cannot be efficiently and safely stored and accessed under the condition that a block chain and a database are combined, and meanwhile, the files can be safely accessed under different demand occasions.

The invention discloses a deep sea combustible ice mining and carbon dioxide sealing and jetting integrated operation tool which is mainly composed of a safety connector mechanism, a mechanical self-locking mechanism, an anchoring mechanism, a packing mechanism and a jetting mechanism. The mechanical self-locking mechanism comprises a switching self-locking connector, a slope guide ring and a spring I, switching and locking of different functions are achieved, and the practicability of the tool is improved; the anchoring mechanism is internally provided with an upper slip, a horse tooth shaft I, a double-stroke piston cylinder I, a double-stroke piston cylinder II, a horse tooth shaft II and a lower slip, so that the anchoring capability is enhanced, and the operation stability is ensured; through the change of the movement stroke of the mechanical self-locking mechanism, switching and locking of drilling, mining, injection and sealing functions are achieved, and mutual combination of multiple natural gas hydrate mining methods, fracturing transformation and hydrate carbon sequestration is achieved; integration is achieved through combination of all the mechanisms. By combining a process method, the risk of carbon dioxide hydrate downhole blockage is prevented, and the carbon sequestration amount is increased.

The invention relates to the technical field of storage, and provides a storage space allocation method and device and a solid state disk. The method is applied to a solid state disk adopting a PLC (programmable logic controller) system, and comprises the following steps: firstly, checking the health state of each data block, and marking each data block of which the health state is completely bad as a bad block; obtaining each data block except all bad blocks from all the data blocks to obtain a to-be-processed block set; finally, distributing the to-be-processed block set to obtain a first storage space and a second storage space; the first storage space is used as a system area, and the second storage space is used as a user area. According to the method, the health state of each data block in the solid state disk is checked, and the data blocks of which the health state is completely bad are marked as bad blocks, so that the bad blocks are eliminated when the storage spaces of the system area and the user area are distributed, the stability of the solid state disk is improved, and the storage performance of the solid state disk is improved.

The invention discloses a preparation method of a defective graphene negative electrode for a lithium battery, which comprises the following steps: grinding natural graphite into powder, carrying out graphite modification by irradiation of a high-current pulse electron beam, mixing with a conductive agent and a binder to prepare slurry, and coating the slurry on a metal foil to prepare the defective graphene negative electrode for the lithium battery. Natural graphite is modified through high-current pulse electron beam irradiation, obvious expansion deformation occurs on the surface of the natural graphite, defects are generated on a graphite structure, mutual stripping between graphite layers is achieved, the whole surface of the graphite is in a hairy wrinkle form, the structure is almost transparent, and the storage capacity and the cycling stability are obviously improved; the obtained defective graphene negative electrode material provides more channels for lithium ion diffusion, the ion diffusion path is effectively shortened by internal gaps, and a physical method is adopted, a specific reducing agent, an oxidizing agent or other intermediate media do not need to be used, and introduction of impurities is avoided.

The invention relates to a memory allocation method and device, computer equipment, a storage medium and a program product. The method comprises the following steps: receiving a memory allocation request of to-be-stored data to a memory database, wherein the memory allocation request comprises a data storage amount of the to-be-stored data; determining a target memory block from a virtual process space of the memory database according to the data storage amount; the virtual process space is a storage space mapped to a disk file based on a memory mapping mechanism, and data stored in the virtual process space is synchronously stored in the disk file; the size of the target memory block is greater than or equal to the data storage amount; and distributing the target memory block for the to-be-stored data, wherein the target memory block is used for storing the to-be-stored data. By adopting the method, the storage capacity and the storage efficiency of the memory database can be improved.

According to the multi-two-dimensional-code data array generation and identification method and system provided by the invention, a plurality of two-dimensional codes are arranged in an array form, and through a corresponding generation and identification algorithm, the original advantages of the two-dimensional codes are maintained, and the information storage density and the identification speed are remarkably improved; the spatial relevance between the two-dimensional codes is fully considered in the multi-two-dimensional code data array generation process, the data storage efficiency is improved, and the error code diffusion condition in the recognition process is avoided; by introducing an error correction extreme value with high robustness and an optimization recognition algorithm, stable recognition of the multi-two-dimensional code data array in a complex environment is ensured; the limitation of an existing two-dimensional code in the aspects of information transmission and processing is effectively solved, a large amount of complex information is transmitted at a time by generating a multi-two-dimensional-code data array, the information storage capacity is greatly improved, more complex scene requirements are met, the scanning frequency is reduced, the information obtaining efficiency is improved, the high recognition accuracy is guaranteed, and the misreading risk is reduced.

The invention relates to the technical field of environmental data processing, in particular to an environmental monitoring data processing method and system based on big data analysis. The method comprises the following steps: carrying out statistical marking on an urban environment to-be-monitored area, and obtaining block vegetation type data, block environment humidity data and block soil condition data; carrying out block vegetation growth analysis and vegetation carbon storage influence analysis on the basis of the block vegetation type data to obtain actual block vegetation carbon storage; performing soil microflora abundance analysis and soil organic carbon storage estimation on the block soil condition data to obtain actual organic carbon storage of block soil, and performing time period window division and carbon sink capacity comparison division to obtain an urban green land efficient carbon sink block and an urban green land low-efficiency carbon sink block; and performing targeted optimization adjustment on the urban green land low-efficiency carbon sink block until the urban green land low-efficiency carbon sink block is converted into an urban green land high-efficiency carbon sink block. According to the invention, the regional carbon sink capability can be effectively improved and managed.

The utility model discloses a device for storing and transporting predatory mites, which comprises a hollow accommodating body, the hollow accommodating body is an accommodating space for accommodating the predatory mites and feed, the accommodating body is further provided with an opening, a plugging piece is arranged at the opening, the top of the accommodating body is provided with a plurality of top air holes communicated with the accommodating space, and the top air holes are communicated with the accommodating space. A supporting structure is arranged at the top and / or the bottom of each containing body, so that when the two containing bodies are stacked in the vertical direction, the bottom of the upper containing body does not block a plurality of top air holes in the top of the lower containing body, and a plurality of side air holes communicating with the containing space are formed in the side faces of the containing bodies; the size of the containing space in the vertical direction is larger than the size of the containing space in the horizontal direction. The storage amount of predatory mites can be increased, the space utilization rate is greatly increased, and the survival rate is guaranteed; and during transportation, stacking arrangement in the vertical direction is achieved through the supporting structures, and more devices can be transported in a limited space.

The invention provides a lithium ion gel electrolyte, a preparation method and application. Relates to the field of lithium ion battery electrolyte preparation. The polymer monomer in the lithium ion gel electrolyte provided by the invention is pentaerythritol tetraacrylate with a fluorine group, a silane group or a siloxane group, so that the interface stability, the mechanical strength and the chemical stability of the battery can be remarkably improved on a micro level, and the cycle performance and the storage performance of the lithium ion battery are effectively improved.

The invention discloses a dual-mode communication system performance test method based on a single-chip microcomputer. The method comprises the following steps: S1, building a test system; step S2, test setting; step S3, evaluation standard setting; s4, comparing by setting a data table; and S5, analyzing an evaluation result in the step S4. Through the scientific and comprehensive evaluation method, performance evaluation of multiple communication modes can be supported, and the requirements of different application scenes are met. In the aspect of evaluation, multiple indexes are set, channel switching is considered, and comprehensive evaluation of the system performance is achieved; in the aspect of practice, a real communication environment is simulated, result operation is carried out in one step by using software, and then the transmission process of dual-mode communication is simulated in a laboratory, so that the accuracy and reliability of an evaluation result are improved. The stability, reliability and efficiency of the dual-mode communication system are accurately reflected, and a basis is provided for further optimization and improvement of the system.

The invention relates to an antireflection polymer film with a lead ion sealing function for a perovskite cell, and preparation and application thereof, and belongs to the technical field of perovskite solar cells. PVA and water are mixed and heated to be dissolved, and a transparent and clear PVA solution is obtained; the preparation method comprises the following steps: sequentially adding a phosphoric acid solution, dibasic phosphate and a transparent plasticizer into a PVA (Polyvinyl Alcohol) solution under continuous heating, respectively reacting for more than 1 hour, pouring the obtained modified polymer solution on a substrate with a micro-nano structure, and naturally curing and stripping to obtain the antireflection polymer film PFPF with lead ion sequestration. When the PFPF is applied to the light receiving surface of the perovskite solar cell, Pb < 2 + > leaked by the PSCs when the light receiving surface is damaged can be reduced, and Fresnel reflection of the light receiving surface can be reduced, so that the light energy loss is reduced, and the photoelectric conversion efficiency of the PSCs is improved.

An intelligent blood specimen storage system comprises a blood specimen storage system body, a man-machine interaction module, a storage module, a refrigeration module, an electric control module and an automatic equipment module, and a first frame and a second frame are arranged in the blood specimen storage system body; a man-machine interaction module is arranged on one side, corresponding to the blood specimen storage system shell, of the first frame, an equipment external code scanner and a scram button are arranged on one side below the man-machine interaction module, and an access opening is formed in the other side below the man-machine interaction module; a storage module is arranged on the first side of the first frame, an automatic equipment module is arranged on the second side of the first frame, and refrigeration modules are arranged on the third side and the fourth side of the first frame; an electric control module is arranged on the second frame and connected with the man-machine interaction module, the storage module, the refrigeration module and the automation equipment module. The system can realize automatic storage of blood specimens and full-process information tracing, guarantees data security, and protects personal privacy.

The invention discloses a method for improving optical storage performance by superposing and rewriting a Type X structure based on femtosecond laser direct writing, and belongs to the technical field of optical storage, and the method comprises the steps: 1, determining a processing parameter window of the Type X structure; 2, determining a seed pulse parameter and a write-in pulse parameter; 3, random data writing and reading are carried out; according to the method, the storage points are superposed and rewritten by utilizing the erasable rewriting characteristic of the Type X, so that the limitation of optical diffraction limit can be bypassed, the storage capacity of the femtosecond laser permanent optical storage technology is improved by at least one order of magnitude, the number of pulses required by each storage point can be reduced, and the data writing speed is improved.

The invention discloses a Fe < 3 + > doped nanobelt structure VO2 (B) / V3O5 heterojunction material and a preparation method and application thereof.The method comprises the following steps that 3 mmol to 5 mmol of V2O5 is added into 25 mL to 35 mL of deionized water, 7.5 mL to 12.5 mL of H2O2 is dropwise added, a clear dark red solution A is obtained, 0.15 mmol to 0.25 mmol of FeCl3. 6H2O and 40.5 mg to 67.6 mg of PEG-4000 are added into the solution A and fully stirred till complete dissolution, a mixed solution B is obtained, then the mixed solution B is transferred to a high-pressure reaction kettle, the temperature of the high-pressure reaction kettle is increased, and the Fe < 3 + > doped nanobelt structure VO2 (B) / V3O5 heterojunction material is obtained. The preparation method comprises the following steps: putting a high-pressure reaction kettle into a drying oven, reacting at 150-200 DEG C for 24-48 hours, and then sequentially cleaning and drying to obtain the powdery Fe < 3 + >-doped nanobelt structure VO2 (B) / V3O5 heterojunction material which has good structural stability, high power density and high area specific capacity and can promote rapid charging and discharging of an aqueous ammonium ion battery.

The invention relates to the technical field of airport cargo station automation. The invention provides an unmanned processing method and system for an intelligent cargo station of an airport. The method comprises the following steps: submitting information of cargos to be departed from the port; the cargos to be departed are classified; barcodes are pasted on goods to be departed, safety detection is carried out, the goods to be departed are weighed, storage positions are stored, and the goods wait for ex-warehouse; carrying out bucket assembling and plate beating on the goods to be departed, carrying the goods to be departed to a goods temporary storage area through an unmanned tractor, and carrying out goods loading; after the cargos enter the harbor, cargo handling is conducted, the cargos entering the harbor are stacked and palletized, and the cargos entering the harbor are carried to a pre-distributed harbor storage location to be stored; and the cargo owner sends a cargo picking request, transports the cargo entering the port to the designated position of the platform and completes cargo picking, so that the problem that the processing capacity of the system is greatly reduced when the business of the airport cargo system is busy due to the fact that the existing airport cargo station processing method cannot process the complex and diverse port entering and leaving processes of different types of cargos is solved.

The invention provides a method for forming an isolation groove, a preparation method of a semiconductor device and process equipment, and the method for forming the isolation groove comprises the steps: forming a mask layer on a stacking structure, and enabling a mask opening of the mask layer to expose a partial region of the stacking structure; the stacked structure comprises a laminated structure and a plurality of storage columns penetrating through the laminated structure along a first direction, and the first direction is the thickness direction of the laminated structure; and alternately and circularly etching the laminated structure and the storage column in the exposed region of the stack structure to form an isolation groove. According to the scheme, the storage columns in the isolation grooves can be removed, so that the stacked structure is completely divided into a plurality of storage areas by the isolation grooves, and the storage density and the storage capacity can be improved.

The utility model discloses a multifunctional computer storage device capable of being added, the two side parts of a mounting plate are connected with driving screw rods through threads, one end of each driving screw rod is fixedly connected with a rotating knob, and the other end part of each driving screw rod is rotatably connected to the side part of a side part limiting plate in a limiting manner; according to the air injection device, the driving screw rod, the rotating knob, the guide sliding groove and the limiting sliding block are used for conveniently driving the edge limiting plate to conduct limiting and guiding movement, so that a main machine is conveniently limited, and the air injection pipe is connected to the middle end of the top of the edge limiting plate; and meanwhile, in the host limiting process, flexible protection can be provided for the host by injecting air into the side air bag rings through the side air bag rings and the air injection pipes on the sides of the side limiting plates, so that a certain buffer space is provided for the host in the host storage and transportation process, and the host is prevented from being damaged in the transportation process.

The embodiment of the invention provides a secondary battery and electric equipment, the secondary battery provided by the embodiment of the invention comprises a roll core and an electrolyte, the roll core comprises a positive pole piece, a diaphragm and a negative pole piece which are stacked in sequence; the mass of the electrolyte which can be accommodated by 0.85-0.95 time of the sum of the pore volume of the diaphragm, the pore volume of the positive pole piece and the pore volume of the negative pole piece in the roll core is determined as the total electrolyte retention capacity of the secondary battery, so that the electrolyte supply requirements in the charge-discharge cycle process and the storage process of the secondary battery are met; the lithium precipitation risk at the two sides of the roll core is reduced, the capacity retention ratio of the secondary battery cycle is improved, and the cycle life and storage performance of the secondary battery are further improved.