645 results about "Charge rate" patented technology

The invention relates to the technical field of current compensation, and discloses a current compensation strategy and a compensation system for improving the direct current fast charging rate of an electric automobile. According to the scheme, the total current of a high-voltage loop and the input current of a battery are detected in real time, the dynamic load current difference value is calculated, and the battery health state and historical charging data are combined; and the charging pile request current value is adaptively adjusted to counteract the shunting influence of the load power. Meanwhile, a closed-loop feedback regulation mechanism is adopted, a compensation coefficient is corrected in real time through a PID algorithm, and the stability of the charging current is ensured. When the power of the charging pile is limited, the system dynamically reduces unnecessary loads (such as an air conditioner and a heater) according to a preset priority request, and the charging power of the battery is guaranteed preferentially. The charging rate is improved (the charging time is shortened by 10%-15%), the adaptability of the system to dynamic load fluctuation is enhanced, and the service life of the battery is prolonged.

In one aspect, a computer-implemented method for executing an artificial intelligence (AI) engine, including executing a categorization model configured to categorize, into categories, vehicles based on factors comprising age, temperature conditions, usage patterns, battery health metrics, or some combination thereof, executing a behavior analysis model configured to analyze behavior of the vehicles in each of the categories to identify battery performance metrics including charging habits, discharge rates, charge rates, state of charge, state of health, state of power, or some combination thereof, executing a recommendation generation model configured to generate, based on the battery performance metrics, recommendations for enhancing battery management strategies, wherein the recommendation generation model accounts for a current state of a vehicle to suggest actions to improve battery health; and executing a battery model configured to determine power and energy consumption based on the recommendations generated by the recommendation generation model.

The invention relates to the technical field of charging infrastructure management, and particularly discloses a charging pile appointment scheduling and path planning cooperation system and a charging pile appointment scheduling and path planning cooperation method. According to the method, continuous wavelet transform and fast Fourier transform are adopted to extract a charging rate fluctuation characteristic value and a power grid power supply stability characteristic value for quantitatively evaluating the service stability of a charging pile and the power supply reliability of a regional power grid, and the system fuses the characteristic values into a comprehensive characteristic vector as the input of a gradient boosting tree model so as to obtain a gradient boosting tree model; and training the prediction model to output a charging planning score so as to judge whether the user can smoothly complete the charging task, and if a prediction result does not meet a set threshold value, dynamically adjusting a reservation scheduling strategy and re-planning an optimal charging path.

The present invention discloses a formation method for a sodium-ion single battery, which includes constant current charging of the sodium-ion single battery at a charging rate of 0.1C - 0.5C under the condition of 20 - 25°C, and the charging cut-off voltage is V C1 and standing still for 30 - 60 minutes, placing the single battery under the condition of 2 - 10°C for 1 - 2 h, and using voltage V C2 to perform constant voltage charging for 2 - 5 seconds and then standing still for 3 - 8 seconds, standing still for 30 - 60 minutes under the condition of 20 - 25°C, and performing constant current discharging of the sodium-ion single battery at a discharging rate of 0.1C - 0.5C, and the discharging cut-off voltage is V D1、 placing the single battery under the condition of 35 - 55°C for 1 - 2 h, and using voltage V D2 to perform constant voltage discharging for 3 - 6 seconds and standing still for 5 - 8 seconds. The formation method of the sodium-ion single battery significantly changes the performance of the sodium-ion battery, effectively improving the first capacity, charge and discharge efficiency, and cycle life of the sodium-ion battery.

The application discloses a kind of fast charging method and device of lithium ion battery, it is related to power battery charge-discharge technical field.The application aims at the problem that the fast charging method of existing lithium battery cannot better adapt to the state of lithium battery in different charging stages.The SOC interval is selected in the application, and the SOC interval is divided into several charging stages with the defined ΔSOC as interval;The residual life prediction value of lithium ion battery is obtained according to the temperature, state of charge, charge rate and charge cycle number of lithium ion battery;The characteristic curve of lithium ion battery is obtained, and the charge time weight α of each charging stage is obtained according to the charge characteristic curve;The charging current of each charging stage is obtained by inputting the charging time, charge time weight and residual life prediction value into target equation.The application effectively prolongs the service life of battery while ensuring safe and fast charging.

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.

Systems and methods for determining a total chargeable / dischargeable energy of a subsystem of a battery energy storage system (BESS) are disclosed. An iterative process is executed over a dynamic time period divided into iterations using a neural network model comprising an energy prediction sub-model and a state prediction sub-model. The energy prediction sub-model outputs a chargeable / dischargeable energy of the subsystem for the current iteration. The state prediction sub-model outputs a voltage of the subsystem for a next iteration, the charge rate of the subsystem for the next iteration, the maximum temperature of the subsystem for the next iteration, and a charge rate difference for the next iteration. A total chargeable / dischargeable energy of the BESS subsystem is determined by summing the dischargeable energies determined for each iteration.

A battery control device that controls a battery pack in which a plurality of batteries are connected to each other detects a voltage variation between the plurality of batteries, calculates a restriction coefficient based on a charging rate of the battery pack and the voltage variation, and restricts inputtable / outputtable power based on the restriction coefficient, the inputtable / outputtable power being maximum power inputtable to and outputtable from the battery pack.

A charging method, including: obtaining the number of charge-discharge cycles of a battery and an application scenario during charging; determining a target charging mode among at least two charging modes according to the number of charge-discharge cycles and the application scenario, in which different charging modes have different charging rates, and the charging modes with different charging rates have different charging damages to the battery; and charging the battery in the target charging mode.

The invention provides a display device and a display method. The display device comprises a display panel and a driving chip, the driving chip comprises a voltage regulating unit, an overvoltage driving unit and a triggering unit; the trigger unit is used for detecting whether the current display picture of the display panel is a heavy-load picture or not, and when the display picture is the heavy-load picture, the trigger voltage regulation unit and the overvoltage driving unit are triggered to work cooperatively; the voltage adjusting unit is used for adjusting a target driving voltage corresponding to a target gray scale in the liquid crystal driving voltmeter, so that the lighting effect reaches the preset brightness when the display panel displays a white picture; the overvoltage driving unit is used for starting a driving function, adjusting the parameter configuration table and performing overvoltage driving on a data line of the display panel based on the parameter configuration table and the target driving voltage so as to improve the charging rate of the heavy-load picture, so that the charging rate is improved by detecting the heavy-load picture and cooperatively adjusting the voltage and overvoltage driving, and the charging efficiency is improved. The method has the advantages of improving the charging rate of a heavy-load picture, eliminating display defects and improving the display quality.

The invention discloses a charging control method and device for a full liquid cooling charging pile and a medium, and the method comprises the steps: collecting the charging information needed by the full liquid cooling charging pile during charging, inputting the charging information into a preset LSTM model, and obtaining a corresponding power grid load prediction value; according to the power grid load prediction value, a charging power upper limit value corresponding to the full liquid cooling charging pile is determined; when it is detected that the full-liquid-cooling charging pile is in the charging state, the battery is charged according to the charging power upper limit value, and a corresponding temperature control protection strategy is executed on a liquid cooling module according to the real-time temperature gradient corresponding to the liquid cooling module in the full-liquid-cooling charging pile; and acquiring a charging rate corresponding to the battery through the battery management system interface, determining that the battery is charged when the charging rate is greater than a preset value, and controlling the full-liquid-cooling charging pile to enter a low-power-consumption mode.

A charging management system includes a network interface, a memory, and a processing circuit including a processor. The processing circuit is configured to determine monetary information related to an energy price, determine an electrical vehicle (EV) power limit PLIM for a total amount of EVs in an EV charging network, transmit the monetary information to two or more agents, each of the two or more agents associated with an EV in the EV charging network, receive, from each of the two or more agents, a bid including: an agent monetary value, a desired charging rate PD, and a charging interval, and allow the EVs associated with the two or more agents to be charged based on each of the bids.

Example energy management systems and methods are described. In one implementation, multiple solar cells are configured to deliver energy in response to received sunlight. A stationary battery is configured to store energy generated by the multiple solar cells. An energy controller is configured to dynamically determine a charging rate of the stationary battery and a charging rate of an electric vehicle based on a state-of-charge level of the stationary battery and an amount of energy presently received from the multiple solar cells.

The invention relates to a lithium ion battery sectional type quick charging method for reducing polarization, which comprises the following steps of: firstly, carrying out stepped constant-current and constant-voltage charging on a battery cell: dividing into N constant-current and constant-voltage charging stages, and carrying out constant-current and constant-voltage charging in each constant-current and constant-voltage charging stage to a corresponding limited voltage or limited capacity; and performing constant-voltage charging on the battery cell until the final current is reached. In the charging process of the lithium ion battery, multi-stage capacity cut-off and multi-stage voltage termination are combined, the charging process is divided into multi-stage constant-current and constant-voltage charging, constant-current and constant-voltage charging in each stage reaches the limited voltage or the limited capacity, and the constant-current and constant-voltage charging is stopped until the voltage reaches the upper limit voltage of the battery. According to the sectional type rapid charging method, the polarization lithium concentration difference between the interior and the exterior of the graphite particles can be effectively eliminated, diffusion of lithium into the graphite particles can be improved, damage to the graphite structure can be avoided, the rapid charging time of the battery can be optimized, and the cycle performance of the battery can be improved.

A control system for pre-conditioning a refuse vehicle includes processing circuitry. The processing circuitry is configured to obtain a scheduled deployment time of the refuse vehicle. The processing circuitry is also configured to perform a first pre-conditioning operation by operating a charging system to charge batteries of the refuse vehicle at a first charge rate over a first time interval, and a second charge rate over a second time interval to fully charge the batteries by the scheduled deployment time. The charging system is configured to provide direct current (DC) electrical energy to the batteries for charging. The processing circuitry is also configured to perform multiple other pre-conditioning operations at least partially simultaneously with performing the first pre-conditioning operation.

The invention provides a charging remaining time prediction method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring an initial temperature, an initial state of charge and an initial charging rate of a target battery at an initial moment; the initial temperature, the initial charging rate and the sum value of the initial charge state and the preset charge state step length are used as input, and the temperature of the target battery at the end point of each prediction interval is predicted through a temperature rise prediction network; the preset state-of-charge step length is used for indicating the state-of-charge variation of the adjacent prediction intervals; determining the charging rate of the target battery in each prediction interval from the mapping relation between the temperature and the charge state of the target battery and the charging rate; the preset charge state step length is compared with the charging rate of the target battery in the prediction interval, and the charging time of the target battery in each prediction interval is determined; and determining the sum value of the charging durations of all the prediction intervals as the charging remaining time of the target battery.

Provided are a secondary battery and an electronic apparatus. The secondary battery comprises a positive electrode sheet, a negative electrode sheet, a separator and an electrolyte, wherein the negative electrode sheet comprises a negative electrode current collector and a negative electrode material layer located on at least one surface of the negative electrode current collector; the negative electrode material layer comprises a negative electrode active material; the negative electrode active material comprises a silicon-carbon composite material; on a plane formed by the direction of length of the negative electrode sheet and the direction of thickness thereof, the minimum value of an interior angle of an outer contour of a particle with a maximum circumscribed-circle diameter of greater than 10 μm in the silicon-carbon composite material is A°; and the thickness of the separator is B μm, where 488≤A×B≤3600, and 4≤B≤25. The secondary battery has good self-discharge performance, charging rate performance and cycling performance.

Provided is a device for determining the feasibility of operation, based on an operation plan, of a storage battery, the device comprising: a simulation unit for simulating at least one of the state of charge, temperature, and charging / discharging current of the storage battery when a charging / discharging operation is performed in the storage battery according to the contents of the operation plan; a determination unit for determining the feasibility of operation of the storage battery according to the operation plan, using, as determination target indexes, a result of the simulation and a setting value of a charging / discharging output for each unit time segment described in the operation plan; and a modification unit capable of modifying the operation plan when it is determined that the operation is not feasible. When at least one of the determination target indexes does not fall within an allowable range, it is determined that the operation is infeasible, and the operation plan can be modified by adjusting the setting value of the charge / discharge output for each unit time segment in the operation plan determined to be infeasible. When the operation plan is modified, the operation feasibility is determined for the modified operation plan.

The invention provides a charging strategy lithium precipitation boundary window evaluation method and system, and belongs to the field of lithium ion batteries. The method comprises the following steps: manufacturing a lithium ion battery comprising a positive pole piece, a negative pole piece, a diaphragm and an electrolyte; performing a rate charging test on the lithium ion battery at a set rate to obtain constant-current charging capacity and constant-current and constant-voltage charging capacity of the battery under different rates, and calculating a constant-current charge-in ratio; calculating the maximum SOC when the battery cell reaches the lithium precipitation boundary under different charging rates, and formulating a stepped charging strategy according to the maximum SOC; and according to the obtained stepped charging strategy, carrying out a cell charging and discharging cycle test, and judging the lithium precipitation condition of the cell. The method does not need to depend on a three-electrode tool and a special battery device, the lithium precipitation boundary window can be rapidly and efficiently evaluated, the established charging strategy can ensure that lithium precipitation does not occur in the battery cell under the rapid charging condition, and the rapid charging strategy establishment efficiency and the cycle performance and safety of the battery are remarkably improved.

The invention discloses an energy storage circuit of an air conditioner control device, a control method and device and a storage medium. The control device of the air conditioner comprises a controller and a power supply circuit, the power supply circuit is used for converting an external power supply and then supplying power to the controller, the energy storage circuit is arranged between the output end of the power supply circuit and the power supply end of the controller, and the energy storage circuit comprises a super capacitor switching circuit and a charging circuit. The super capacitor switching circuit comprises a plurality of super capacitors and a switching device. The switching device comprises a switching circuit arranged between two adjacent super-capacitors and used for controlling the multiple super-capacitors to be switched between a first connection state and a second connection state, the first connection state is that the multiple super-capacitors are connected in parallel, and the second connection state is that the multiple super-capacitors are connected in series. The output end of the charging circuit is connected with the input end of the super capacitor switching circuit, and the charging circuit is used for charging the super capacitors. Therefore, the charging rate of the super capacitor is improved.

The invention discloses a temperature control method and device for energy storage equipment, and relates to the field of temperature control, and the method comprises the steps: determining the target water outlet temperature of a liquid cooling unit according to the charging rate or discharging rate of a battery in the energy storage equipment; the environment temperature of the environment where the energy storage equipment is located is obtained; a current heat dissipation mode is determined based on the difference value between the target water outlet temperature and the environment temperature; and cooling the cooling liquid based on the current heat dissipation mode. The environment temperature can influence the temperature of the battery, meanwhile, the higher the charge-discharge rate of the battery is, the larger the heat productivity of the battery is, the target water outlet temperature determined based on the charge-discharge rate can meet the heat dissipation of the battery, and the difference value between the environment temperature and the target water outlet temperature can decide the working mode suitable for the current working condition. Different heat dissipation powers can be provided by dry cooler heat dissipation, heat exchanger heat dissipation and mixed heat dissipation of dry cooler heat dissipation and heat exchanger heat dissipation, and the problems of energy conservation and insufficient heat dissipation caused by mismatching of the heat dissipation powers and heat dissipation requirements can be avoided.

The invention discloses a quick-charging low-voltage platform high-capacity battery system for an electric forklift, and the system comprises a battery module which is installed on the electric forklift and supplies power to the electric forklift; the box body is mounted on the electric forklift; the two charging seats are arranged outside the box body and are used for being connected with a charging gun of a charger; the electric control system is arranged in the box body, the input end of the electric control system is connected with the two charging seats, and the discharge port of the electric control system is arranged on the box body and connected with the battery module; according to the battery module, the low-temperature-rise battery cell is used, the heating value is reduced from the source in the charging process, the charging rate is improved on the premise that a liquid cooling system is not used, the double-gun charging technology can be used for a high-capacity battery, the charging current is improved, and the purpose of rapid charging is achieved.

A battery cell, a lithium ion battery, and an electric device. The battery cell comprises a wound electrode assembly, and the wound electrode assembly has bent areas. The wound electrode assembly comprises a negative electrode sheet and a positive electrode sheet, the negative electrode sheet comprises a plurality of first bent portions located in the bent areas, and the positive electrode sheet comprises a plurality of second bent portions located in the bent areas; the distance L1 between the concave surface of a second bent portion and the convex surface of an adjacent first bent portion located on the inner side of the second bent portion is greater than or equal to the distance L2 between the convex surface of the second bent portion and the concave surface of an adjacent first bent portion located on the outer side of the second bent portion, 17 μm≤L1≤34 μm, 14 μm≤L2≤34 μm, and L1≥L2; the equivalent charge rate c of the battery cell from 10% SOC to 80% SOC satisfies: 3C≤c≤8C. The battery cell can enable fast-charging lithium ion batteries to have good cycle performance and safety performance.

Systems and methods for determining a total chargeable / dischargeable energy of a subsystem of a battery energy storage system (BESS) are disclosed. An iterative process is executed over a dynamic time period divided into iterations using a neural network model comprising an energy prediction sub-model and a state prediction sub-model. The energy prediction sub-model outputs a chargeable / dischargeable energy of the subsystem for the current iteration. The state prediction sub-model outputs a voltage of the subsystem for a next iteration, the charge rate of the subsystem for the next iteration, the maximum temperature of the subsystem for the next iteration, and a charge rate difference for the next iteration. A total chargeable / dischargeable energy of the BESS subsystem is determined by summing the dischargeable energies determined for each iteration.

The invention discloses a preparation method of a negative electrode active material, a negative electrode plate, a battery and an electric device, and the method comprises the following steps: mixing a precursor solution of dielectric material particles with a negative electrode active material, and carrying out heating reaction and calcination under an air isolation condition to obtain the negative electrode active material. The battery containing the negative electrode active material prepared by the preparation method is high in charging rate and few in active ion dendrites.

Portable power supply with a maximum charge rate feature. The portable power supply includes a power source; a power input unit configured to receive power from an external source; a core charger coupled to the power source and the power input unit; and an electronic processor coupled to the core charger. The electronic processor is configured to receive a power limit value and determine a supportable charge current of the internal power source. The core charger is configured to determine a power-limited current based on the power limit value and an output voltage of the core charger, determine a target output current by comparing the power-limited current and the supportable charge current, and charge the power source with the received power at the target output current.

A positive electrode active material that enables an increased discharge capacity retention rate of cycling performance is provided. A secondary battery includes a positive electrode pressed under a linear pressure higher than or equal to 100 kN / m and lower than or equal to 3000 kN / m and a negative electrode. When a test battery that includes the positive electrode and a negative electrode containing lithium undergoes, in an environment at higher than or equal to 25° C. and lower than or equal to 45° C., a cycling test of 50 repetitions of a cycle of charging and discharging in which, after constant current charging is performed at a charge rate of 0.5 C (1 C=200 mA / g) until a voltage of 4.7 V is reached, constant voltage charging is performed until the charge rate reaches 0.05 C at a voltage of 4.7 V, and then constant current discharging is performed at a discharge rate of 0.5 C until a voltage of 2.5 V is reached, and the discharge capacity of the battery is measured in each cycle, a discharge capacity value measured in the 50th cycle is greater than or equal to 35% and less than 100% of the maximum discharge capacity value in all the 50 cycles.

The invention provides a charging pile power adaptive regulation and control method and device, and relates to the technical field of power adaptive regulation and control. The method comprises the following steps: firstly, setting regulation and control points according to a preset time interval, collecting a station total incoming line available power upper limit, total active power and charging state data of each charging pile, and calculating a demand priority score of each charging pile based on a current battery charge state and a historical power distribution condition; generating a plurality of candidate strategies according to positive and negative total power margin, and respectively implementing differential power increase and decrease for high and low demand priority piles; according to the charging rate curve, simulating the total charging completion time of all the charging piles under each strategy, selecting the strategy with the shortest total time as a comprehensive optimal strategy, and determining the target distribution power of the next regulation and control point of each pile; and finally, smoothly issuing a power instruction to a power control unit of each pile through slope rate limitation. On the premise of guaranteeing the safety of the power grid, the overall charging efficiency and the user satisfaction degree of the station can be remarkably improved.

The invention discloses a charging voltage control method and system for a capacitive energy storage welding machine, and the method comprises the steps: monitoring the voltage, current and temperature of a capacitor in real time in a charging process, and obtaining data through a sensor, and inputting the data into a controller; the controller dynamically adjusts the charging voltage according to the real-time feedback, and calculates and adjusts the power output by adopting a self-adaptive algorithm; if the temperature of the capacitor reaches the set threshold value, the charging voltage is automatically adjusted or the charging rate is reduced, and the charging voltage is adjusted according to the welding load change; the upper limit of the charging voltage and the charging time are dynamically adjusted according to the working state of the capacitor through an optimization algorithm, so that the capacitor is ensured to operate in a safe interval; the system combines welding parameters, dynamically optimizes charging voltage and current output, and ensures that the charging process is stable and efficient.