1630 results about "Battery energy" patented technology

The invention relates to the technical field of battery management, and discloses a battery energy balanced distribution and optimization method, device and equipment and a storage medium. The method comprises the following steps: performing multi-source parameter acquisition and feature decoupling on each single battery in a target battery pack to obtain a single battery state data set, and performing multi-band excitation scanning and impedance spectrum fitting to obtain internal features of the battery and decompose an attenuation trend to generate equivalent circuit model parameters; performing state mapping and capacity calculation based on the model parameters to obtain a performance evaluation result of the battery pack, and constructing an energy transfer network and identifying unbalanced propagation characteristics through performance difference analysis and consistency calculation; and temperature coupling calculation and compensation matrix reconstruction are carried out based on propagation characteristics, multi-path parallel balance control is realized, and an optimization result of the battery pack is obtained through voltage deviation calculation and polarization compensation. According to the method, the multi-dimensional characteristic parameters and the dynamic change characteristics are combined, and accurate control over battery pack equalization is achieved.

The invention discloses a battery energy recycling method for an underwater robot, and the method comprises the steps: integrating the equipment state and environment data of the underwater robot, screening the data through a particle filtering algorithm, capturing the depth information of an underwater environment in real time, collecting the material attribute of a battery and an energy transmission efficiency parameter, and recognizing the parameter through a k-means clustering algorithm. The method comprises the following steps: constructing constraint conditions of an energy recovery network, constructing an energy recovery network topology model according to energy loss information and node layout, obtaining an optimal path by applying an Euleran path algorithm, determining an arc curvature by adopting a non-dominated sorting genetic algorithm, dynamically updating topology model parameters, obtaining an optimized energy recovery arc, and constructing an arc optimization mechanism. A logistic regression algorithm is used for scoring arcs and identifying efficient nodes, an Apriori association rule mining algorithm is used for simplifying a network topology structure, calculating structural differences and updating a model, a fitness function algorithm is used for monitoring the network state and energy loss in real time, and the transmission efficiency is evaluated.

The invention relates to the technical field of SOC estimation, in particular to an SOC estimation method and system for a lithium battery pack. The method comprises the following steps: collecting basic parameters and voltage data of a lithium battery pack, generating steady-state voltage data by using singular value decomposition and time domain reconstruction, further performing multi-level feature mapping and performance reconstruction to obtain basic discharge data, calculating battery energy efficiency and deducing normal power consumption based on the data, and calculating the energy efficiency of the lithium battery pack. Discharging simulation is carried out to evaluate the temperature rise condition, discharging capacity attenuation is predicted in combination with working environment parameters, relative errors are calculated, finally, the charge state is corrected, electric quantity self-calibration is carried out, and intelligent state estimation of the lithium battery pack is achieved. According to the invention, a more efficient SOC estimation method is realized.

The invention provides an efficient and controllable sodium ion battery hard carbon negative electrode chemical sodium pre-treatment method, which comprises the following steps: in an inert atmosphere, dropwise adding an aryl-sodium organic solution on the surface of a hard carbon negative electrode plate, and washing and drying the plate after the aryl-sodium organic solution permeates the hard carbon negative electrode plate. The aryl-sodium solvent is 9-methyl fluorene-sodium, 9, 9-dimethyl fluorene-sodium and derivative sodium thereof. Through hard carbon negative electrode pre-sodium treatment, the loss of active sodium in the first-circle charging and discharging process of the negative electrode is compensated, and the first-circle coulombic efficiency of the negative electrode is improved. The method is simple and convenient to operate, the sodium modification degree of the hard carbon negative electrode is controllable, the reaction safety is high, and large-scale research is easy to realize industrial production. The sodium ion total battery is assembled by matching the pre-sodium hard carbon negative electrode and the sodium vanadium fluorophosphate positive electrode, the initial discharge specific capacity of the total battery is greatly improved, the energy density of the sodium ion battery is favorably improved, and the sodium ion total battery has wide prospects and application value.

The invention relates to the technical field of fire-fighting management, and discloses an intelligent fire-fighting service management system, which comprises a data acquisition unit used for acquiring three basic parameters, namely environment data, working condition data and battery data, of a fire-fighting object in an office building, and the system acquires the environment, working condition and battery data of a fire extinguisher through the data acquisition unit; the fusion unit generates a dynamic composite abnormal threshold value, and the adjustment unit executes a three-stage sampling frequency adjustment mechanism according to the threshold value, the battery health degree score and the data deviation degree, which means that the sampling frequency can be reduced to reduce the battery energy consumption when the state of the fire extinguisher is normal and the risk is relatively low, and when the risk is increased or the battery health degree is reduced, the battery energy consumption is reduced. The whole system realizes accurate management and regulation of the battery according to the actual working condition of the fire extinguisher, energy waste is avoided, the service life of the battery is prolonged, the cost of frequently replacing the battery is reduced, and the sustainability of intelligent fire control management is enhanced.

The invention relates to the field of power battery energy management, in particular to a power battery pack charging and discharging efficiency dynamic optimization system and method, and the system comprises a central control unit, a multi-dimensional sensing module, a dynamic charging and discharging control module, a working condition-heat dissipation cooperation module, a parallel cell equalization module and an aging adaptation optimization module. The multi-dimensional sensing module is used for collecting basic parameters, polarization characteristics, parallel state, aging degree and environmental parameters of a battery pack, the dynamic charging and discharging control module is used for collecting data, the working condition-heat dissipation coordination module adopts a three-stage heat dissipation framework, and the parallel battery cell balancing module is used for balancing the battery pack through a dynamic current distribution and voltage active balancing double-coordination mechanism. The aging adaptation optimization module is used for grading and differentially optimizing charge and discharge parameters and heat dissipation strategies based on the aging degree of the battery cell, so that the problems of low charge and discharge efficiency, poor wide temperature range adaptability, weak parallel consistency, fast aging attenuation and multi-factor coupling deterioration of the power battery pack are solved.

The invention discloses a hydrogen cooling superconductive flywheel composite energy storage system, which relates to the technical field of new energy storage and comprises a superconductive flywheel energy storage module, a lithium battery energy storage module, a power conversion module, an intelligent control module, a cooling sub-module and a hydrogen energy recovery module, by combining the quick response characteristic of the superconducting flywheel and the high energy density of the lithium battery, the superconducting flywheel can realize quick energy storage and release by utilizing the friction-free characteristic of the superconducting flywheel, a cooling sub-module and a hydrogen energy recovery module are used, the cooling requirement of the superconducting flywheel is ensured, and meanwhile, energy recovery can be carried out; by utilizing the characteristic of high energy density of the hydrogen battery, the energy storage capacity of the composite energy storage system is further improved, and the limitation of a single energy storage technology on power density and energy density can be effectively solved through the hybrid energy storage system; and more reliable and efficient energy storage support is provided for the fields of power grid peak regulation, renewable energy source grid connection, electric automobiles and the like.

The utility model provides a heat exchange assembly, a box body, a battery and an electric device. The heat exchange assembly comprises a conveying mechanism, a flow dividing mechanism and a heat exchange plate, the conveying mechanism comprises a main body and a plurality of connecting parts which are arranged at intervals in the first direction and communicate with the main body, the flow dividing mechanism is arranged on the side, in the second direction, of the conveying mechanism and communicates with the connecting parts, and the heat exchange plate is arranged on the side, in the third direction, of the flow dividing mechanism. A heat exchange flow channel in the heat exchange mechanism is communicated with the shunting mechanism, so that the external environment is communicated with the heat exchange plates through the transmission mechanism and the shunting mechanism to realize input and output of a heat exchange medium in the heat exchange assembly, current collectors do not need to be independently arranged at two ends of a single heat exchange plate, the production cost of the battery is reduced, and the size of the heat exchange assembly is reduced; and the battery energy density is improved.

The invention relates to a temperature control method, device and equipment for a new energy automobile air conditioner and a medium, and the method comprises the steps that the environment temperature in an automobile and heater surface temperature data are collected in real time through multiple sensors, a preliminary adjusting instruction is generated in combination with the temperature preset by a user, and a power distribution strategy is dynamically optimized based on battery residual current; a duty ratio adjusting technology is adopted to carry out power control on a heater power supply circuit, overload risk grading response is realized through a grading safety threshold detection mechanism, a closed-loop feedback mechanism is further introduced, and control parameters are dynamically optimized according to real-time temperature feedback and a battery health state. And the problems of large temperature deviation of multiple regions and unbalanced battery energy consumption are solved. Through temperature-current-battery multi-dimensional fusion control, hierarchical dynamic protection and an energy consumption equalization algorithm, the driving comfort is guaranteed, meanwhile, the overload risk of the system is effectively reduced, the service life of the battery is prolonged, and the method is suitable for the intelligent safety temperature control scene of the new energy automobile air conditioner.

The invention relates to a lithium battery technology, in particular to a solid electrolyte, a lithium battery adopting the solid electrolyte and a preparation method of the lithium battery. The lithium battery comprises a positive plate containing a composite current collector, a negative plate, a diaphragm, a package and a solid electrolyte, the negative plate, the diaphragm and the positive plate are sequentially laminated in the packaging layer, and the solid electrolyte is filled among the negative plate, the diaphragm and the positive plate; the solid electrolyte and the composite current collector have an unexpected synergistic effect in the aspect of improving safety, in a needling experiment, when the solid electrolyte and the composite current collector are used at the same time, a relatively complete electronic insulating layer can be formed on the needling surface when the battery is penetrated by a needling needle, and occurrence of short circuit and thermal runaway is reduced; by using the composite current collector, the mass of the current collector in the battery is reduced, and the reduction of the battery capacity caused by high impedance of the solid electrolyte and the composite current collector is compensated, so that the sacrifice of the energy density of the battery is reduced.

The invention relates to a detection control method and system for a vehicle emergency starting power supply, and the method comprises the steps: obtaining multi-battery type interface data of the vehicle emergency starting power supply, and carrying out the electrical characteristic recognition processing, and obtaining the characteristic information of a battery interface; acquiring real-time operation data of the vehicle emergency starting power supply, and performing association processing on the real-time operation data and the battery interface feature information to obtain a battery operation state evaluation result; acquiring battery charging and discharging energy data of the vehicle emergency starting power supply, and performing battery state prediction according to the battery charging and discharging energy data to obtain a battery energy balance trend; comprehensively analyzing the battery operation state evaluation result and the battery energy balance trend to obtain an initial power management control scheme; and performing iterative optimization on the initial power management control scheme according to the fault early warning information to obtain a corresponding emergency start power protection strategy. According to the invention, the emergency starting power supply can be ensured to operate efficiently under different use conditions.

A battery pack according to an embodiment of the present disclosure includes: a plurality of battery modules; a tray including a mount plate on which the plurality of battery modules are seated, a front frame provided on an end portion in a longitudinal direction of the mount plate, and a rear frame provided on the other end portion in the longitudinal direction of the mount plate; a pair of side covers covering both end portions in a width direction of the tray; at least one module partition wall parallel to the front frame and the rear frame, and located between adjacent battery modules; and a battery energy management system (BEM) assembly including a BEM bracket having one end portion fastened to the at least one module partition wall and the other end portion fastened to the rear frame, and a BEM mounted on the BEM bracket.

The invention discloses a battery pole piece, a manufacturing method thereof and a secondary battery. The pole piece comprises a current collector and an active material layer arranged on at least one surface of the current collector, the middle part of the pole piece is provided with a pole lug groove, the pole lug groove is a non-through groove along the Y direction, the pole lug groove is provided with a pole lug, and the pole lug comprises a connecting section positioned in the pole piece and an exposed section positioned outside the pole piece. Compared with the prior art, the non-through tab groove is formed in the middle of the pole piece, and the tab is arranged in the tab groove, so that the surrounding area of the tab can be coated with the active material, the space utilization rate of the pole piece is remarkably improved, more active substances can be accommodated under the same volume, and the energy density of the battery is effectively improved; meanwhile, as the coating area of the active material is increased, the current distribution is more uniform, the internal resistance is further reduced, and the rate capability of the battery is improved.

The invention discloses an electric vehicle charging power aggregation distributed regulation and control method, and relates to the technical field of AC charging pile charging power regulation and control, and the method specifically comprises the following steps: carrying out the cleaning and stabilization processing of power load and new energy data, employing an ARIMA model to predict the load, and employing an LSTM-Transform model to predict the new energy generation power; the upper layer aggregates the total state of the charging station, including the electricity price, the load, the total vehicle energy, the total docking power of the lower-layer single vehicle model and the battery demand; based on an MCTS enhanced DDPG algorithm, the total charging power is optimized through cost discount rewards and energy penalty; an improved ADMM algorithm distributes total power to each pile, and battery stress and heat loss are minimized; and comparing the actual battery energy with the virtual battery energy, and updating the data and re-deciding when the energy is inconsistent. According to the invention, three industry bottlenecks of poor real-time response of electric vehicle charging, slow large-scale scheduling and difficulty in consideration of economy and battery health are overcome, and power grid dynamic response acceleration, decision-making efficiency jump and comprehensive benefit breakthrough are realized.

The invention provides a light storage coordinated feed-in new energy microgrid power quality improving device and method, and relates to the technical field of microgrid distributed control. The light storage coordinated feed-in new energy microgrid power quality improving device comprises a series converter, a parallel converter, a battery energy management system and a direct current power supply unit. According to the optical storage coordinated feed-in new energy microgrid power quality improvement method, a prediction equation is established for a series converter to decouple a control target, and power grid current can be accurately compensated. An adaptive compensation control technique based on a VLLMS algorithm is employed for the parallel converter to generate a control signal for the parallel converter. A virtual inertia control strategy is provided for a battery energy management system, and inertia support is provided for a series converter and a parallel converter. And aiming at a non-ideal voltage condition, constructing a PB-SM compensation strategy of the new energy micro-grid power quality improving device based on optical storage coordinated feed-in.

Disclosed in the present disclosure are a secondary battery and an electrochemical device. The secondary battery comprises a positive electrode sheet, a negative electrode sheet, a separator and an electrolyte, wherein the positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer arranged on the positive electrode current collector, the positive electrode active material layer comprises a positive electrode active material, and the particle size distribution curve of the positive electrode active material comprises a first peak and a second peak. The secondary battery satisfies: 0.22≤K≤2.13, and K=Dn50×(Dv90-Dv10) / Dv50. On the basis that the proportion of the area of the first peak and the proportion of the area of the second peak sum to 100%, the proportion of the area of the first peak is S1%, the proportion of the area of the second peak is S2%, R=S1 / S2, and 0.25≤R≤2.33. In the present application, the volume distribution curve of the positive electrode active material is limited to be in a bimodal form by optimizing the particle size distribution thereof; and by means of particle size grading, the compaction density is improved, and lithium-ion transport pathways are reduced, thereby improving the energy density of the secondary battery.

The invention provides a current collector, a pole piece, a secondary battery, an electric device, a copper foil and a preparation method of the copper foil. The current collector comprises a copper foil, the average particle size of crystal grains in the copper foil is 50-400 nm, and based on the total number of the crystal grains in the copper foil, the number ratio of the crystal grains of the nano twin crystals is larger than or equal to 60%. Under the combined action of the high-proportion nano twin crystal structure and the small grain size, the mechanical strength of the current collector is improved while the high plasticity of the current collector is maintained, and a material basis is provided for further improvement of the energy density and the safety of the battery.

A battery state-of-energy health assessment method and apparatus, and an electronic device and a readable storage medium. The method comprises: acquiring state-of-energy health data, wherein the state-of-energy health data is the ratio of dischargeable energy of a battery under fixed C-rate operating conditions at different states of aging to dischargeable energy of the battery under the same C-rate operating conditions at an initial stage of the battery (S101); acquiring charging energy of the battery of a target vehicle at different temperatures, and acquiring the ratio of the charging energy to theoretical charging energy (S102); and using a preset algorithm to assess the state-of-energy health data and the ratio of the charging energy to the theoretical charging energy, in order to obtain an assessment result (S103). In the method, acquiring battery state-of-energy health data and the ratio of charging energy to theoretical charging energy achieves comprehensive assessment of battery state-of-energy health from two perspectives, so as to more rationally estimate the residual driving range of electric vehicles, thereby achieving more accurate estimation results.

The invention relates to the technical field of battery energy management, in particular to an energy management system and method for a hydrogen fuel cell module, and the system comprises a monitoring collection module which collects and contrasts the readings of a sensor based on the voltage parameter, the current parameter and the temperature parameter of the hydrogen fuel cell module to obtain original monitoring data, and performing numerical comparison on the load demand of the power distribution network to generate supply and demand matching information. In the invention, the difference statistics and the difference operation improve the accuracy of energy distribution, so that the matching between the energy distribution and the actual load demand is more accurate, and the overall energy efficiency is improved while the energy waste is reduced. And frequency band extraction and rate recording can capture subtle changes output by the battery, and the response speed is increased. In addition, the analysis and adjustment of the phase feature group provide adaptive ability, and the stability and reliability of the load change of the power grid are enhanced.

The invention relates to the field of batteries, in particular to a negative plate and a battery comprising the negative plate. The negative plate comprises a negative current collector, a bottom coating and a negative active material layer, the bottom coating and the negative active material layer are positioned on one side or two sides of the negative current collector, the bottom coating is positioned between the negative current collector and the negative active material layer, the bottom coating comprises a three-dimensional structure formed by a first conductive binder, the first conductive binder comprises a first carbon nano tube, and the first carbon nano tube comprises a second carbon nano tube. The negative plate meets the following relational expression: 1.2 < = B / K < = 3.4, B is the length-diameter ratio of the first carbon nanotube, and K is the tensile strength of the negative current collector. According to the negative plate, the thickness of the priming coat can be greatly reduced, and the energy density of the battery is increased; the binding power between the negative electrode current collector and the negative electrode active material layer can be enhanced, the structural stability of the active material layer can be improved, the pole piece deformation and powder falling in pole piece processing and battery circulation can be improved, and the circulation expansion can be inhibited; the conductivity of the pole piece is improved and the fast charging performance of the battery is improved.

The invention relates to the technical field of solid-state battery energy conversion, and discloses a high-safety sodium-ion battery energy conversion method based on a solid-state electrolyte, which comprises the following steps: identifying an interface dynamic mismatch risk time period in a charging and discharging process, and applying micro-amplitude high-frequency acoustic vibration disturbance to a solid-state electrolyte and a sodium negative electrode interface in the time period, sodium ion microscopic distribution is regulated and controlled through the acoustic streaming effect, contact stress is dredged, dendritic crystal early nucleation is inhibited, dynamic reconstruction and optimization of the interface state are achieved, the solid-state sodium-electricity interface is converted into dynamic self-adaption from static mismatch, the ion transmission uniformity is actively maintained through the acoustic streaming effect, and dynamic reconstruction and optimization of the interface state are achieved. And meanwhile, real-time sensing of an interface state and dynamic adjustment of acoustic vibration parameters are realized in combination with an acoustic probing mechanism, so that the interface stability and dendritic crystal inhibition capability are effectively improved, and the energy conversion efficiency and the safety performance of the battery are remarkably enhanced.

The invention discloses a negative plate and a preparation method thereof, a battery and electric equipment. The negative plate comprises a current collector, a first coating and a second coating. Wherein the first coating and the second coating comprise active substances, the D50 particle size of the active substance of the first coating is greater than the D50 particle size of the active substance of the second coating, the D50 particle size of the active substance of the first coating is 5-12 [mu] m, and the D50 particle size of the active substance of the second coating is 1-7 [mu] m. According to the negative plate provided by the invention, the compaction density of the negative plate is improved, the energy density of the battery is improved, contact sites between active substances and between the active substances and the current collector are increased, and the hierarchical charge-discharge rate performance of the battery is improved. And meanwhile, the second coating is arranged on one side of the contact diaphragm, so that the short circuit condition caused by the morphology hardness of an active substance of the second coating can be effectively reduced, the process yield is improved, and the service life of the battery is prolonged.

The invention discloses a pre-lithiated diaphragm as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The pre-lithiation diaphragm comprises a base material and a slow-release pre-lithiation agent coating coated on the positive electrode side of the base material, the slow-release pre-lithiation agent coating comprises a slow-release lithium supplement agent, and the slow-release lithium supplement agent comprises a lithium supplement agent and a slow-release agent coated on the outer layer of the lithium supplement agent. According to the pre-lithiation diaphragm disclosed by the invention, the surface of the diaphragm base material is coated with the slow-release lithium supplement agent, due to the characteristic of sustainable release of the buffer agent, a protective SEI layer and a lithium metal alloy are formed on a negative electrode all the time, and a battery system can maintain relatively high lithium ion concentration, so that the cycle performance of a battery is improved; and the surface of the diaphragm is coated with the slow-release lithium supplement agent, the process is mature, and the proportion of active substances on the surface of an electrode is not reduced, so that the energy density of the battery is not influenced, and the cycle performance can be improved while the performance of a battery cell is not reduced.

The invention relates to the technical field of battery energy, in particular to a battery cell and a battery. The battery cell comprises a first pole piece, a diaphragm and a second pole piece, the first pole piece and the second pole piece are stacked, and the diaphragm is arranged between the first pole piece and the second pole piece; and along the first direction, the stripping force F1 between the diaphragm on the outermost side and the second pole piece adjacent to the diaphragm meets the condition that F1 is greater than or equal to 13N / m. By improving the adhesion between the diaphragm on the outermost side of the battery cell and the second pole piece, the problem of curling and warping of the single-sided pole piece in the battery cell can be solved, so that the phenomenon that the distance between the first pole piece and the second pole piece is increased due to curling and warping is avoided, the transmission distance of lithium ions is reduced, and the transmission efficiency of the lithium ions is improved. According to the present invention, the lithium precipitation problem of the battery cell cycle black spot is reduced, the cycle life of the battery is prolonged, and the adhesion between the diaphragm and the second pole piece is increased so as to reduce the deformation problem during the battery cycle and reduce the abnormal expansion in the thickness direction during the cycle so as to improve the cycle performance of the battery.

The invention relates to an in-situ cured silicon-based composite negative pole piece as well as a preparation method and application thereof. The silicon-based composite negative pole piece comprises a negative pole piece and a polymer electrolyte layer which is cured in situ and coats the surface of the negative pole piece; the polymer electrolyte layer is obtained through in-situ polymerization reaction of a precursor solution applied to the surface of the negative pole piece; the precursor solution contains a fluoroalkyl functional group; and the negative pole piece comprises a silicon-based material of which the surface is rich in hydroxyl. The composite negative pole piece disclosed by the invention not only can effectively limit the volume expansion of a silicon negative pole in a circulation process and reduce the phenomena of particle pulverization and interface separation, but also remarkably enhances the adhesive force among active substance particles, and ensures the structural integrity of the pole piece and the efficient transmission of ions and electrons. The silicon-based negative pole piece can form a stable solid-solid interface with the solid electrolyte through the polymer coating layer, so that the interface impedance is remarkably reduced, and the ion conduction efficiency is improved, thereby enhancing the cycling stability and safety performance of the battery while improving the energy density of the battery.

The invention relates to the technical field of new energy, and discloses a battery and a battery pack. A pole; the laminated battery cell comprises a battery cell body and a tab extending from one end of the battery cell body along the first direction; the pole lugs are electrically connected with the pole columns; the tabs comprise a positive tab and a negative tab, and the positive tab and the negative tab are both located at the same end of the battery cell body in the first direction; the positive electrode lug and the negative electrode lug are arranged at an interval along a second direction, and the second direction is perpendicular to the first direction; the spacing distance between the positive pole lug and the negative pole lug along the second direction is a1, the width of the laminated battery cell along the second direction is a2, a = a1 / a2, the length of the battery cell body along the first direction is b, and b.a is more than or equal to 8mm and less than or equal to 350mm. According to the battery provided by the invention, the over-large b.a easily causes the increase of the over-current demand of the battery cell and the reduction of the area of the welding region. And too small battery energy density is low.

The invention provides a thermal management system of an electric automobile and a control method of the thermal management system, and relates to the technical field of electric automobiles. The system comprises a refrigerant loop and a cooling liquid loop. The refrigerant loop comprises a first pipeline, and a compression mechanism, a condensation mechanism, a liquid storage mechanism, an expansion valve and an evaporation mechanism which are sequentially communicated through the first pipeline; a refrigerant circulates in the first pipeline; the cooling liquid loop comprises a second pipeline, and a water pump, a ten-way valve, a passenger compartment heat exchange mechanism, a motor and a battery which are connected in the second pipeline; cooling liquid circulates in the second pipeline; the refrigerant loop and the cooling liquid loop are connected through a condensation mechanism and an evaporation mechanism. And through cooperation of the water pump and the ten-way valve, the cooling liquid is conveyed to at least one of the passenger compartment heat exchange mechanism, the motor and the battery. The heat management efficiency is high, the battery energy consumption is reduced, the endurance mileage of the electric automobile is increased, the refrigerant loop structure is simple, and the refrigerant charging amount is reduced.

The invention provides a lithium iron phosphate positive electrode material and a preparation method thereof, a positive plate and a preparation method thereof, and a secondary battery, the lithium iron phosphate positive electrode material has a low Fe-Li antiposition defect, the mass of the Fe-Li antiposition defect accounts for 0-2% of the total mass of the positive electrode material, and the ion diffusion coefficient of the Fe-Li antiposition defect is 10 <-13 >-10 <-6 > cm < 2 > / s. Compared with the prior art, the lithium iron phosphate positive electrode material prepared by the invention has good electronic conductivity, also has a very high lithium ion diffusion coefficient, is beneficial to improving the rate capability of the material, and also has a relatively low Fe-Li antiposition defect, so that the prepared lithium iron phosphate has higher capacity and is beneficial to improving the energy density of the battery.

The invention relates to the technical field of electric scooters, in particular to a vehicle battery energy-saving control system of a high-strength impact-resistant scooter, which comprises an impact-resistant battery bin, a battery energy-saving control system and a battery energy-saving control system, wherein the impact-resistant battery bin comprises a multi-layer composite shell, a vibration sensor and a filling layer; the energy-saving control module comprises an intelligent detection unit, a central controller and a power optimizer; the power optimizer is used for adjusting the PWM duty ratio of the motor driving circuit according to the power mapping table; the energy recovery module is used for receiving brake force, a slope angle, a motor rotating speed and a vehicle mass estimation value, calculating an optimal recovery current through a Kalman filter, and injecting the recovery current into a battery pack by adopting a bidirectional Buck-Boost circuit; and the safety cooperative controller executes a hierarchical protection strategy, and a data bus is connected with each module to realize data interaction. Therefore, the problems that in the prior art, an electric scooter is insufficient in battery endurance, low in energy recovery efficiency, weak in impact resistance, poor in collaboration and the like are solved.

The invention belongs to the technical field of electronic cigarette heating, and particularly relates to an electronic cigarette heating temperature control system and a control method thereof, comprising the electronic cigarette heating temperature control system and the control method thereof, the electronic cigarette heating temperature control system comprises heating temperature control hardware and heating temperature control software, the heating temperature control hardware comprises a heating wire, a sensor, a controller, a display screen and a power supply module, and the heating temperature control software comprises an environment sensing mechanism, a real-time monitoring adjustment mechanism, a temperature feedback mechanism, an energy consumption optimization mechanism and a safety protection mechanism. According to the electronic cigarette heating temperature control system and the control method thereof, the energy consumption of the electronic cigarette is optimized through an energy consumption optimization mechanism, so that the battery energy consumption of the electronic cigarette is greatly reduced, the electronic cigarette can be used for a longer time, and the use duration of the electronic cigarette is prolonged.