1932 results about "Fast charging" patented technology

The invention discloses a control system for lithium battery power management, and relates to the field of lithium battery control, and the system comprises a voltage input module which is used for externally connecting voltage and supplying power to a battery power supply module and a time delay module; the battery power supply module is used for charging the battery; receiving the battery voltage information, and adjusting the voltage output to the battery according to the battery voltage; the battery module is used for a battery to store electric energy; compared with the prior art, the system has the beneficial effects that the output voltage of the battery power supply module is adjusted through the feedback module, the output voltage of the battery power supply module is relatively large at the beginning, and the charging voltage is reduced along with the increase of the battery voltage, so that a quick charging effect is constructed; whether battery charging is abnormal or not is detected through the time delay module and the charging fault detection module, the battery power supply module is adjusted to perform constant-voltage charging when charging is abnormal, and the battery charging effect is guaranteed.

The invention discloses a new energy commercial vehicle fast charging working condition thermal management control method and system, and relates to the technical field of new energy vehicle thermal management and fast charging control, and the method comprises the following steps: collecting the temperature, voltage and current data of each subarea of a battery in a fast charging process, forming a time synchronization sequence, and based on the sequence, obtaining a new energy commercial vehicle fast charging condition; calculating internal thermal resistance and thermal capacity parameters of the battery in real time by using an online identification algorithm, updating a basic thermal model to obtain a corrected thermal dynamic model reflecting actual thermal characteristics of the current battery, importing the corrected model into a model prediction controller, constructing a multi-objective optimization function, and performing rolling solution in a prediction time domain to obtain a prediction model; and outputting an optimal target charging current instruction and a cooling total demand, adjusting the charging power according to the target current, and combining the temperature difference distribution of each partition. Accurate prediction and partition cooperative control of the thermal state of the battery in the fast charging process are achieved, the temperature rise and the temperature difference are effectively restrained while the charging efficiency is guaranteed, the service life of the battery is prolonged, and the system safety is improved.

The invention provides a lithium battery internal short circuit fault early warning and positioning method and system based on deep learning. The early warning and positioning method comprises the following steps: step S10, multi-dimensional data semantic acquisition and working condition self-adaptive preprocessing; step S20, collaborative extraction and alignment of cross-scale spatio-temporal features; step S30, performing dynamic threshold adaptive internal short circuit early warning and feedback optimization; s40, fault accurate positioning and verification of topology perception are carried out; and step S50, performing embedded collaborative optimization and self-diagnosis deployment. According to the invention, early weak signals of an internal short circuit fault can be found in time, and the efficiency and timeliness of battery safety monitoring are improved; the sensitivity of early warning is improved; the robustness in high-temperature, low-temperature and rapid charging and discharging environments is enhanced; and the positions of the single battery and the electrode with the fault can be accurately identified.

The present invention relates to the technical field of batteries, and provides a battery cover plate, a battery and a battery pack, the battery cover plate comprises: a cover plate body provided with a through hole; the sealing plate is arranged at the through hole, and the sealing plate is in sealing connection with the through hole; the boss is arranged on the outer side of the sealing plate in the first direction, the boss extends out of the through hole in the first direction, a plurality of convex ribs with closed outlines are integrally formed on the end face of the side, away from the cover plate body, of the boss, and the first direction is the thickness direction of the cover plate body; the surface area of the outer surface of the boss is increased through the existence of the convex ribs, meanwhile, the heat dissipation area of the battery cover plate is greatly increased, heat generated by a system can be rapidly conducted and dissipated in the charging and discharging process of the battery, the working temperature of the battery is effectively reduced, the battery can stably adapt to the high-rate rapid charging technical scheme, and in addition, the service life of the battery cover plate is prolonged. Through the design, the surface of the boss can be coated with the structural adhesive, and the bonding area of the structural adhesive and the boss is remarkably increased.

The invention discloses a new energy automobile charging pile multi-dimensional data fusion monitoring and early warning method and system, and relates to the technical field of new energy automobile charging safety monitoring and control. The new energy vehicle charging pile multi-dimensional data fusion monitoring and early warning method comprises the following steps: S1, constructing a charging state original data set, and preprocessing the charging state original data set; s2, performing early warning grade division in combination with a disturbance trend analysis result and discriminator output; s3, a response control condition is matched according to the early warning level state; and S4, recording the operation structured data of the charging pile, constructing an event chain, and comparing the current and historical features to identify the coincidence degree. The problem that due to the complex operation working conditions of high-frequency plugging, large day and night temperature difference and heavy environmental dust of a new energy automobile charging pile in an urban fast charging station, an existing monitoring method cannot achieve multi-dimensional sensing and dynamic adjustment, and then abnormal early warning lags is caused is solved.

The invention relates to the technical field of community new energy control, and discloses an orderly and rapid charging new energy control method, which comprises the following steps: collecting photovoltaic output data, power grid voltage / current data, user charging behavior data and battery state parameters in real time; generating a dynamic charging strategy based on the power grid load data, the time-of-use electricity price information, the photovoltaic output fluctuation range and the battery health state evaluation result; generating a corresponding local optimization strategy based on the operation state data of each charging pile; an economic index and a technical index are calculated, and when any index exceeds a preset threshold value, a strategy adjustment instruction is triggered, and a charging mode switching threshold value is updated; an equipment health index is generated by combining inverter temperature, coil coupling efficiency and insulation impedance parameters with historical fault data, and maintenance early warning is triggered when the health index is lower than a safety threshold value. According to the invention, the electricity cost of the user can be reduced on the basis of improving the multi-energy collaborative optimization capability of the charging facility in the residential area.

The invention relates to the technical field of unmanned aerial vehicle charging and the technical field of energy storage, and discloses an unmanned aerial vehicle intelligent wireless quick charging platform based on echelon utilization batteries, which comprises a battery health assessment module, a battery management module and a battery management module, performing dynamic health assessment on each echelon battery in a charging and discharging state; the charging resource scheduling module obtains charging request information sent when the unmanned aerial vehicle prepares to return to the charging station, and dynamically allocates charging resources; the wireless charging control module is used for identifying the position information when the unmanned aerial vehicle lands, adjusting the wireless charging power and adaptively optimizing the working frequency; the energy optimization configuration module is used for performing energy optimization configuration; the safety protection module is used for identifying potential safety hazards and carrying out safety protection and fault self-healing; the optimization maintenance module is used for evaluating the performance of the charging platform and carrying out closed-loop optimization and decision updating; according to the invention, precise matching between the performance of the echelon battery and the charging demand of the unmanned aerial vehicle is realized.

The invention discloses a lithium battery dynamic rapid charging track generation method based on multi-state estimation and risk criterion, belongs to the technical field of electric vehicle lithium ion battery charging, and aims to solve the problem that the charging speed, the energy efficiency and the battery life are difficult to consider in the rapid charging process of a lithium ion battery in a wide temperature range. And a relatively high lithium plating safety risk exists. The method comprises the following steps: firstly, constructing an electrochemical thermal aging coupling model, and establishing a lithium plating risk criterion and risk map based on the model; then, on-line multi-state estimation is realized based on an electrothermal coupling equivalent circuit model, and a multi-objective optimization function and a safety constraint system which comprehensively consider charging time, energy efficiency and life loss are constructed; and finally, a model prediction control framework is utilized, a state estimation result and a risk criterion are fused, and an optimal charging current track is generated in a real-time rolling manner.

The invention relates to a positive plate, a battery comprising the positive plate and an electric device, and belongs to the technical field of batteries. According to the invention, the element M is doped in and / or coated on the surface of the nickel cobalt lithium manganate particles, the bond energy of the element M and O is controlled to be greater than the bond energy of Ni and O, and the ratio of the Fd3m phase thickness in the nickel cobalt lithium manganate particles and the ratio of the mass ratio of M to the relative mass ratio of Ni in the positive electrode material meet a specific relationship, so that the structural stability of the nickel cobalt lithium manganate is remarkably improved; the lithium ion transmission efficiency is higher, the fast charging performance is better, and the higher capacity performance can be realized.

The invention discloses a lithium ion battery charging method, a control system and a storage medium, and the charging method comprises the steps: carrying out the multi-stage charging according to a plurality of divided SOC intervals, and carrying out the constant-current charging of each SOC interval through employing different charging rates. The plurality of SOC intervals are divided according to a peak value or an inflection point of a differential voltage curve calculated by a charge-discharge test of the target battery; the charging rate adopted by each SOC interval is calculated through the following formula: n is the target total charging time, and the unit is h; i and j represent the i or j SOC interval; m is the number of the divided SOC intervals; rj is the percentage of the j-th SOC interval needing to be charged; d is the negative electrode solid phase diffusion coefficient of the corresponding SOC interval. A lithium intercalation reaction stage is identified by analyzing a differential voltage curve, and key kinetic parameters are tested, so that an internal kinetic limit is finally converted into an external executable charging rate, and safe and efficient rapid charging is realized.

The invention is suitable for the technical field of photocatalyst preparation, and provides a modified tubular g-C3N4 loaded Ni-CoP photocatalyst and a preparation method thereof. The preparation method comprises the following steps: calcining a carbon nitride precursor in stages to obtain tubular carbon nitride, stirring the tubular carbon nitride with a cobalt and nickel-containing compound and an alkaline compound, washing and drying to obtain a precipitate, calcining, mixing and grinding with a phosphorus-containing compound, calcining again, and modifying the product with polydopamine and polypyrrole to obtain the composite material. The photocatalyst modified by the polydopamine and the polypyrrole and loaded with the Ni-CoP by taking the tubular g-C3N4 as the carrier is obtained. According to the invention, three-in-one synergistic integration of'carrier-modifier-cocatalyst 'is realized, the prepared photocatalyst still keeps tubular morphology and has a larger specific surface area, the requirements of anode oxygen evolution reaction (OER) on rapid charge separation and transmission can be met, meanwhile, the light absorption range is widened, the solar energy utilization rate is increased, and a foundation is laid for efficient OER reaction.

The invention belongs to the field of negative electrode materials, and particularly relates to a silicon-graphite composite material, a preparation method and application thereof and a lithium ion battery, the preparation method comprises the following steps: mixing and slurrying silicon powder, graphite and a composite functional additive, and then carrying out ball milling modification to obtain primary composite particles; the composite functional auxiliary agent comprises an auxiliary agent A, an auxiliary agent B and an auxiliary agent C; the primary composite particles and a carbon source liquid phase are compounded and then subjected to spray drying and heat treatment, or spray pyrolysis is directly carried out, and secondary composite particles are prepared; and carrying out modification treatment on the secondary composite particles prepared in the step 2 in a surface modification liquid, and then carrying out low-temperature annealing at 150-300 DEG C to prepare the silicon-graphite composite material. The surface modification liquid is an organic solution in which conductive lithium salt and an auxiliary agent D are dissolved. Based on the combined control of the preparation process and the structure, the silicon-based negative electrode material with ultra-long cycle life and excellent low-temperature fast charging performance can be obtained.

The invention discloses a power distribution network space-time coupling electric vehicle fast charging bearing capacity evaluation method and system, and belongs to the technical field of electric vehicle fast charging control, and the method comprises the steps: generating a space-time charging load of an electric vehicle through Monte Carlo simulation based on a road network-power grid coupling model; monte Carlo simulation comprises vehicle group initialization, dynamic path planning and driving, energy consumption and state updating, charging decision and load event recording and all-weather cycle simulation, and a charging load event set is obtained; and based on the charging load event set, constructing an optimization model taking maximization of the number of the electric vehicles acceptable by the power distribution network as a target function, solving the optimization model, and solving the optimization model through a second-order cone relaxation technology and a genetic algorithm to obtain a power distribution network time-space coupling electric vehicle fast charging bearing capacity evaluation result. According to the method, calculation of a large-scale complex network can be completed within reasonable time, and technical support is provided for planning capacity expansion of the power distribution network, optimized layout of the charging piles and scheduling strategies of the electric vehicles.

The invention discloses a high-safety anti-overload fast-charging electronic wire harness system and an electronic wire harness, and belongs to the technical field of electronic wire harness safety protection, and the system comprises a sensing module, a load prediction modeling module, an anomaly detection module, a bypass control module, a central fast-charging regulation and control module and an optimization module. A local load prediction function is constructed by collecting a current change rate and a conductor thermal response curve at the initial stage of fast charging in real time, a resistance abrupt change area is judged, and dynamic current limiting and bypass shunting are carried out; the central module can adjust charging parameters of the next cycle according to historical load characteristics, and the optimization module corrects a prediction model through multi-cycle learning to realize adaptive control; the electronic wire harness integrates a thermoelectric sensor, a resistance sampling unit and a controllable bypass path, and has quick response and local shunting functions; the overload protection capability and the operation safety of the electronic wire harness in the fast charging system can be effectively improved, and the method is suitable for high-power application scenes such as new energy automobiles and high-speed charging piles.

The invention discloses a distributed light storage and charging integrated system, which comprises a photovoltaic power generation unit, an energy storage unit, a charging unit, a power grid interface unit, an energy management controller and a direct current bus, the photovoltaic power generation unit comprises a DC / DC converter, and the photovoltaic power generation unit is connected with the DC bus through the DC / DC converter; the energy storage unit comprises a lithium ion battery pack, a flywheel energy storage device, a bidirectional DC converter and a flywheel controller. The lithium ion battery pack and the flywheel energy storage device are connected to the DC bus through the bidirectional DC converter and the flywheel controller respectively. The charging unit comprises at least one direct-current quick charging pile, at least one alternating-current slow charging pile and a DC / AC inverter, the direct-current quick charging pile is directly connected with the direct-current bus, and the alternating-current slow charging pile is connected with the direct-current bus through the DC / AC inverter; the power grid interface unit comprises an AC / DC converter and is connected with the DC bus through the AC / DC converter. According to the invention, through collaborative design of a modular hardware architecture and an intelligent time-sharing strategy, comprehensive improvement of economy, reliability and functionality of the system is realized.

The invention discloses a fast-charging lithium ion battery electrolyte, a preparation method thereof and a lithium ion battery containing the fast-charging lithium ion battery electrolyte. The fast-charging lithium ion battery electrolyte comprises the following components: electrolyte salt, an organic solvent and an electrolyte additive, the electrolyte additive comprises a first additive and a second additive; the first additive is a multi-element sulfate ester additive, and the mass percentage of the multi-element sulfate ester additive is 0.05%-2% based on the total mass of the electrolyte being 100%. By adding the polybasic sulfate additive with a specific structure, adopting a composite solvent system and cooperating with the synergistic effect of other additives, lithium salt and other components, dual stability of positive and negative electrode interface films is realized, the electrochemical window of the electrolyte is widened, and the thermal stability and cycling stability of the electrolyte are improved; and finally, the battery has the advantages of fast charging capability, high voltage compatibility, long cycle life and high thermal safety at the same time.

The invention discloses a subway tunnel full-section intelligent inspection robot system. The system comprises a mobile platform; a disease detection module; the data processing unit adopts an embedded industrial mainboard, is internally provided with a filtering algorithm and a ResNet50 deep learning model, processes the image and the point cloud in real time, automatically identifies the type, the position and the size of the disease and generates a three-level report; a main channel of the communication module is a double 5G industrial module, supports real-time uploading of a disease result, automatically switches a local cache when 5G is interrupted and supplementarily transmits the disease result afterwards, and is provided with a Bluetooth unit for on-site short-distance data calling; the power supply module adopts two groups of 12V / 100Ah lithium iron phosphate batteries which are connected in parallel, the endurance is greater than or equal to 4 hours, a brake energy recovery device is integrated, the battery is charged back during downhill or deceleration, the endurance is prolonged by about 15%, and one-hour fast charging is supported; and an auxiliary function module. According to the method, the consistency and reliability of detection data are remarkably improved, and a stable basis is provided for subsequent high-precision disease recognition.

The invention discloses a charging pile cable intelligent control method and system based on double-phase-change heat dissipation, and relates to the technical field of intelligent heat dissipation control. The charging pile cable intelligent control method and system based on double-phase-change heat dissipation comprises the steps that S1, double-phase-change thermal control sensing data of a charging pile cable is periodically collected, and the double-phase-change thermal control sensing data is preprocessed; s2, constructing a paraffin phase change heat buffer load item and a fluorinated liquid heat dissipation capability item, quantifying a phase change heat dissipation switching state index value, identifying a current dominant heat dissipation state and generating a corresponding cooling strategy; s3, the execution deviation of the current cooling strategy is evaluated, and whether a cooling strategy reset and protection mode is triggered or not is judged; and S4, the applicability of the current cooling strategy is evaluated, self-adaptive dynamic adjustment operation of cooling strategy parameters is executed, and a cooling strategy adjustment closed loop is achieved. The problems that during high-power fast charging, instant heat of a flexible cable conductor is difficult to dissipate in time, the conductor is easily overheated, and protection is frequently triggered are solved.

The invention discloses a battery pack and a power utilization device. The battery pack comprises a box body, a heat exchange plate, a heat conduction piece and a battery pack, the box body comprises a bottom plate and a frame body; the battery pack comprises a battery column composed of at least two single batteries, and the single batteries are connected to the bottom plate; each single battery comprises a shell, a cover plate and a battery cell, the shell and the cover plate are welded to form a first welding wire, and the battery cell comprises a pole piece; the first side face of the shell is connected with the heat exchange plate through a heat conduction piece. In the second direction, the distance between the heat exchange plate and the first bonding wire is dmm; in the third direction, the distance between the heat exchange plate and the first bonding wire is hmm; x = d + h; in the third direction, the distance between the pole piece and the first bonding wire is kmm; the overlapping area of the orthographic projection of the single battery column in the second direction and the projection of the heat exchange plate is S1 mm < 2 >, and the total area of the single heat exchange plate towards the first side surface is S mm < 2 >; x * k / (S1 / S) is greater than or equal to 25 and less than or equal to 500; according to the battery pack provided by the invention, the heat dissipation capability under a high-power fast charging working condition is favorably improved, and the charging efficiency and the safety are improved.

The invention discloses a high-voltage power distribution unit supporting switching of double battery packs for an electric forklift and a control method, and belongs to the technical field of new energy power systems of electric forklifts. The high-voltage power distribution unit supports the electric forklift to be provided with one or two battery packs, each battery pack corresponds to one high-voltage power distribution unit, and the power distribution units are integrally installed in a battery box body. The power distribution unit comprises core loops and components such as a discharging loop, a charging loop, a pre-charging loop and a heating loop, through cooperative control of the BMS and the VCU, discharging, charging and low-temperature heating of a single battery pack can be achieved, non-inductive switching (automatic switching of a master pack and a slave pack and no influence on operation) of double battery packs can also be achieved, and the double battery packs are not limited by capacity and can be independently charged and replaced. According to the electric forklift, the problems that a traditional electric forklift cannot give consideration to rapid charging and rapid battery replacement at the same time, and the compatibility of batteries with different capacities is poor are solved, and the use flexibility, operation continuity and environmental adaptability of the electric forklift are improved.

The invention relates to the technical field of batteries, in particular to a battery and a battery device.The battery comprises a cover plate assembly, the cover plate assembly comprises a cover plate and a pole, the cover plate is provided with a first end face and a second end face which are opposite, and the pole is fixedly connected with the cover plate; the battery cell comprises a body and a pole lug connected to the body, the pole lug is electrically connected with the pole column through an adapter, the pole lug is connected with the adapter through a first welding mark, and the pole column is connected with the adapter through a second welding mark; in the width direction of the cover plate, the projection of the first welding mark and the projection of the second welding mark at least partially coincide, and an insulating part is arranged between the adapter and the second end face. The projection of the first welding mark and the projection of the second welding mark at least partially coincide, so that a current transmission path is improved, the internal resistance is effectively reduced, and the high-power output and rapid charging capability of the battery is remarkably improved.

The invention provides a secondary battery and an electrochemical device, and relates to the field of electrochemical energy storage. The secondary battery comprises an electrolyte and a negative pole piece, the electrolyte comprises a first substance, and the first substance comprises at least one of compounds with a structure as shown in a formula I; the negative pole piece comprises a negative pole material layer; the negative pole material layer comprises carbon black, single-walled carbon nanotubes, carbon fibers and a silicon-based material; the silicon-based material comprises at least one of a silicon-carbon material, a silicon-oxygen material, a silicon alloy material and a pure silicon material. According to the secondary battery, the electrolyte is designed to contain a compound with a specific structure as shown in the formula I, the mass content of the compound is controlled to be 0.5%-30%, and meanwhile, the negative electrode material layer comprises carbon black, single-walled carbon nanotubes and carbon fibers, so that the high-temperature storage performance, the cycle performance and the high-low-temperature fast charging performance of an electrochemical device containing a silicon negative electrode are remarkably improved.

The invention provides a lithium ion battery. The lithium ion battery comprises a positive plate and a negative plate, the negative plate comprises a negative electrode material layer, and the negative electrode material layer comprises LiC6; the positive plate comprises a positive material layer; the positive electrode material layer comprises lithium iron phosphate; the particle size of the lithium iron phosphate particles is a [mu] m; the specific surface area of the positive electrode material layer is b m < 2 > / g; a voltage platform exists in a capacity-voltage curve when the lithium ion battery is charged; the corresponding voltage of the voltage platform is 3.9-4.7 V, and the slope of the voltage platform is c; and a relational expression 0.13 < = (a * c * 1000) / b < = 84.2 is satisfied. The particle size of the lithium iron phosphate positive electrode material, the specific surface area of the positive electrode material layer and the slope of a voltage platform in a specific voltage interval are designed to meet a relational expression, so that effective transmission of lithium ions is promoted, the fast charging performance of the battery is improved, side reactions between a positive plate and an electrolyte are reduced under the condition of ensuring sufficient decomposition of a lithium supplementing agent, and the service life of the battery is prolonged. The cycle life of the battery is prolonged.

Systems and devices for a USB power adapter to provide power to meet requirements of a user device and identify the power adapter to the user device when connected are described. The systems include a USB adapter having a power, ground, and first and second signal connectors. The first and second signal connectors are connected to an integrated circuit of the USB adapter including a transistor. The first and second signal connectors are also connected to a diode arranged in parallel with the transistor.

The invention discloses an unmanned aerial vehicle battery replacement scheduling system and method based on multi-state battery prediction, particularly relates to the technical field of unmanned aerial vehicle battery management, and is used for solving the problems of insufficient energy of an inspection unmanned aerial vehicle and mismatching of battery replacement decisions. According to the method, multi-source data such as voltage, current, temperature, internal resistance and environment wind speed are collected, key states such as charge, health, power, energy and temperature are extracted, state feature vectors related to task context are formed, and task energy consumption and return energy are estimated based on a prediction model. A scheduling instruction for continuing tasks, going to a charging station or a battery swap station, maintaining charging and cooling fast charging is generated, in a battery swap scene, an improved ant colony algorithm of a battery health factor is introduced to construct a path cost function, distance, energy consumption and time are considered, optimal battery swap station selection and safe path planning are achieved, and the optimal battery swap efficiency is improved. And the energy management precision and the task stability of the unmanned aerial vehicle inspection task are obviously improved.

The invention discloses an intelligent control method and system for rapid charging of a lithium ion battery, and relates to the technical field of battery charging, and the system comprises a state monitoring module, an evaluation module, a parameter adjustment module, a prediction module, a charging control module, a safety protection module and a central processing unit. According to the method, the voltage, current, temperature and internal resistance data of the battery are collected in real time through a multi-source sensor, the health state of the battery and the charging state evaluation result are fused, the charging parameters are dynamically adjusted through fuzzy logic and PID control, then the optimal charging curve is predicted, and a multi-stage self-adaptive charging protocol is implemented; and finally, full-process safety control is realized through deep learning fault diagnosis and a multi-stage protection mechanism, intelligent perception, dynamic decision and closed-loop control are realized, and the charging speed, the battery life and the safety are effectively improved.

The invention provides a battery charging strategy determination method and apparatus, an electronic device and a medium. The method comprises the steps of constructing a multi-physical field coupling model of a battery system; simulation is carried out based on an electrochemical model in the multi-physics field coupling model, fast charging characteristic maps of the battery in different temperature intervals are generated, and the fast charging characteristic maps are used for representing the mapping relation among the charging current of the battery, the temperature rise of the battery and the lithium precipitation boundary; setting a maximum self-heating power limit value of the battery in a low-temperature environment based on the fast charging characteristic map; according to a preset low-temperature fast charging index and the maximum self-heating power limit value, reversely solving and determining the lowest initial charging temperature of the battery meeting the low-temperature fast charging index; and based on the lowest initial charging temperature, solving a parameter solution set containing the thickness and the heat conductivity coefficient of the external thermal insulation layer. According to the invention, the charging efficiency of the power battery in a low-temperature environment is improved.

The invention discloses a negative electrode material and a preparation method thereof, a secondary battery and an electronic device, and belongs to the technical field of energy storage. The negative electrode material comprises silicon carbon particles; the silicon carbon particles comprise a first to-be-detected area and a second to-be-detected area; based on the mass sum of the silicon element and the carbon element in the first to-be-detected area, the mass ratio of the silicon element in the first to-be-detected area is X1%; based on the mass sum of the silicon element and the carbon element in the second to-be-detected area, the mass ratio of the silicon element in the second to-be-detected area is X2%; and 0 < X1 / X2 < = 0.62. The silicon content of the first to-be-detected area (surface layer) and the second to-be-detected area (inside) of the silicon-carbon particles is regulated and controlled to accord with the relationship, so that the polarization phenomenon can be restrained under the fast charging condition, the thermal runaway risk is reduced, and the fast charging performance and the thermal safety performance of the secondary battery are improved.

The invention provides a lithium ion battery rapid charging control method and related equipment, and relates to the technical field of battery charging control, and the method comprises the steps: building a state vector based on an acquired external measurable signal and an internal state of a target lithium ion battery; simulating the target lithium ion battery through a constant-current charging experiment or a high-fidelity single-particle model, recording the charging cut-off voltage when the target lithium ion battery reaches the target charge state in different health states, and obtaining the maximum allowable charging voltage; designing a multi-target reward function by taking the maximum charging voltage as a constraint condition, and calculating a feedback value under the current state vector according to the multi-target reward function; inputting the state vector into a reinforcement learning agent to output continuous actions, and optimizing the reinforcement learning agent by using a feedback value under the current state vector to obtain an optimal charging control strategy of the target lithium ion battery; and rapid charging is realized on the premise of ensuring safety and prolonging the service life.

The invention belongs to the technical field of battery preparation, and particularly relates to a battery. The battery comprises a positive plate, the positive plate comprises a positive current collector and a positive active material layer arranged on at least one surface of the positive current collector, and the positive active material layer comprises a positive active material and a complex; the structural formula of the complex is MFn-CF3SO2Li, M is selected from B or P, and n is 3 or 5; the surface resistance of the positive plate is recorded as a, and the unit is m omega; in the XPS map of the positive plate, the proportion of the S2p peak area of the complex in the binding energy range of 165-180eV is recorded as b; a and b meet the relational expression 1, the complex is subjected to a decomposition reaction under the battery charging and discharging or heating condition, gases such as SO2 and CF4 are released, and a pore structure is formed in a positive active material layer when the gases escape, so that the lithium ion transmission rate is improved, the lithium supplement effect is achieved, and the fast charging performance and the cycle life of the battery are comprehensively improved on the premise of not influencing the electronic contact among active material particles.