300 results about "Charge rate" patented technology

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 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.

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.

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 provides an energy storage battery thermal management method and system. The method comprises the following steps: collecting state information of a target battery pack, wherein the state information comprises a health state value, a cycle index and a current charging rate; acquiring temperature information of the target battery pack; for the state information, a preset state-temperature threshold mapping database is called, and basic temperature thresholds corresponding to the health state value, the cycle index and the current charging rate of the state information are obtained through matching; determining a weight corresponding to each piece of state information according to a preset dynamic weight distribution rule, and performing weighted calculation on each basic temperature threshold according to the weight to obtain an optimal temperature threshold of thermal management of the target battery pack; and performing thermal management control on the target battery pack based on the optimal temperature threshold and the temperature information. According to the invention, the problems of high risk, waste of energy consumption, poor scene adaptability and the like in the aspect of thermal management of the energy storage battery can be solved.

A device includes an AC impedance circuit to apply an AC excitation signal to a set of battery cells of a battery pack. The device includes a controller to determine a battery pack identification (ID) value from a battery pack identification (ID) circuit of the battery pack, calculate an impedance value of the battery pack based on the AC excitation signal, identify a maximum charging rate to charge the battery pack using the battery pack ID value of the battery pack and the impedance value of the battery pack, where the battery pack is one of at least two battery packs having a same battery pack ID value with different maximum charging rates, and set a charging rate to charge the battery pack using the maximum charging rate.

The invention discloses a battery charging control method and a charging system. The method comprises the following steps: acquiring a battery voltage and a battery temperature, and determining a target jump voltage interval in which the battery voltage falls; determining candidate charging multiplying power corresponding to the battery voltage and the battery temperature from the plurality of charging multiplying power according to a charging multiplying power lookup table; taking a smaller value from a preset charging rate upper limit and a candidate charging rate corresponding to the target jump voltage interval as a target charging rate; according to the target charging rate and the rated battery capacity, a charging current is requested from the power supply equipment to charge the battery, and the voltage of the charged battery and the temperature of the charged battery are obtained; and updating the battery voltage by using the charged battery voltage and updating the battery temperature by using the charged battery temperature, and returning to the step of determining the target jump voltage interval in which the battery voltage falls until the battery is charged. According to the embodiment of the invention, the charging efficiency of the battery can be improved.

This invention provides a method for accurately estimating the internal temperature of a secondary battery while considering the state of charge (SOC) and charge / discharge state. The method is a method (80) for estimating the internal temperature (T) of a vehicle secondary battery (1), comprising a repeatedly executed change determination process (50) and a repeatedly executed internal temperature estimation process (60, 60'). The change determination process includes: (54) a step of determining a first change (21) in the internal resistance (R) relative to the charge rate (SOC) based on the voltage (V) and charge / discharge current (I) of the secondary battery when the vehicle is stationary or at the start of driving; and (22) a step of determining a second change (22) in the internal resistance relative to the charge rate based on the voltage and charge / discharge current during vehicle operation. Step (57) of the internal temperature estimation process includes: measuring the external temperature (To) of the secondary battery (62); measuring the charge and discharge current (63); calculating the charge rate (64); determining whether the secondary battery is discharging (66); selecting a first change when discharging (67); selecting a second change when not discharging (68); calculating the internal resistance based on the selected change and the calculated charge rate (69); and estimating the internal temperature based on the external temperature, charge and discharge current, and internal resistance (70).

In the primary adjustment power supply operation of grid-connected batteries in the supply and demand adjustment market, this invention provides a battery control device that avoids interruptions due to insufficient charge and enables continuous supply over a long period of time. [Solution] The system includes a frequency monitoring unit that monitors the frequency from the power grid, a charge rate monitoring unit that monitors the charge rate of the storage battery, a target output correction unit that corrects the target output of the droop characteristic, which is the amount of output change per unit of frequency change at frequencies other than the dead zone, within the range of the upper limit droop characteristic and the lower limit droop characteristic, according to the charge rate, and a control unit that controls the charging or discharging of the storage battery with the target output corrected by the target output correction unit, wherein the target output correction unit corrects the target output toward the lower limit droop characteristic when the charge rate falls below a threshold, and / or corrects the target output toward the upper limit droop characteristic when the charge rate exceeds a threshold.

The application provides a lithium ion battery life prediction method, device, equipment, medium and program product. Cycle life tests are respectively performed on sample lithium ion batteries under different test temperatures and different charge rates, and cycle numbers and corresponding capacity retention rates are obtained. Different cycle life prediction models are obtained through function fitting according to the cycle numbers and corresponding capacity retention rates obtained under different test temperatures and different charge rates. A cycle life prediction model applicable to a lithium ion battery to be tested is determined according to the test temperature and the charge rate of the lithium ion battery to be tested. The cycle life prediction model is determined, and the cycle number of the lithium ion battery to be tested is used to predict the life of the lithium ion battery. The battery capacity retention rate is quickly and accurately obtained, which has guiding significance for optimizing long-term cycle conditions of the battery and prolonging the endurance life of the battery.

The invention discloses a lithium iron phosphate battery fast charging performance determination method and a fast charging battery design method. The method for determining the fast charging performance of the lithium iron phosphate battery comprises the following steps of: establishing a correlation model of Raman ID / IG values of which the cumulative number percentage of a Raman surface scanning negative electrode active material reaches two preset values, the surface density of negative electrode coating, the compaction density of a negative electrode, the conductivity of an electrolyte and a charging rate which can be supported by the lithium ion battery; obtaining a Raman ID / IG value with the cumulative number percentage of the Raman surface scanning negative electrode active material reaching two preset values, the surface density of negative electrode coating, the negative electrode compaction density and the conductivity of an electrolyte; and calculating the supportable charging rate of the lithium ion battery according to the correlation model, and determining the fast charging performance of the lithium iron phosphate battery. The rapid charging performance of the lithium iron phosphate battery can be determined and designed according to the correlation model.

The invention discloses a rapid battery charging management method and device and a storage medium, and relates to the field of charging management, and the method comprises the steps: collecting the initial voltage, environment temperature and transient response parameters of a battery before charging, and building an initial state reference model of the battery; a micro-amplitude pulse disturbance current is superposed in a constant current charging stage, dynamic equivalent internal resistance is calculated in real time, and a battery behavior feature vector is constructed in combination with a temperature change rate, a voltage change trend and voltage rebound time. And inputting the feature vector into a safety evaluation model, generating a charging safety coefficient, dynamically adjusting the charging rate or the charging power according to the charging safety coefficient, and automatically triggering current limiting, power reduction or power-off protection when abnormal deviation of the internal resistance occurs or the temperature rise rate exceeds a threshold value. According to the method, fine sensing and predictive safety control of the internal state of the battery are achieved, charging efficiency and safety are both considered, and the method is suitable for portable energy storage equipment such as a power bank and a hand warmer.

A control method of a battery apparatus includes acquiring a state parameter of a first battery module of the battery apparatus, controlling the first battery module and a charging device to form a first charging loop in response to the state parameter of the first battery module being less than a preset threshold, and controlling the first battery module, a second battery module of the battery apparatus, and the charging device to be connected in series to form a second charging loop in response to the state parameter of the first battery module being greater than or equal to the preset threshold. A charging rate of the first charging loop is higher than a charging rate of the second charging loop.

The invention relates to the technical field of rare earth resource exploration, in particular to an ion adsorption type rare earth content determination method, system, equipment and medium, and the method comprises the following steps: constructing a quantitative relation prediction model between normalized charge rate and total rare earth oxide mass fraction, arranging an impedance measurement system in a research area, and collecting impedance amplitude and phase; and obtaining a normalized charge rate based on the impedance amplitude and the phase, constructing a quantitative relation prediction model between the normalized charge rate and the total rare earth oxide mass fraction, and calculating to obtain the total rare earth oxide mass fraction based on the quantitative relation prediction model. According to the method, the surface electrical influence of the ion adsorption type rare earth ore sample is considered, the correlation between the spectrum induced polarization response and the chemical parameters is established, and the content of the rare earth oxide in the ion adsorption type rare earth sample is estimated by using the correlation.

A charging device includes: a communication unit; and a processor, configured to obtain charge-and-discharge data of a battery through the communication unit, where the charge-and-discharge data includes: the number of cycles of the battery and / or a cycling time of the battery. The processor is configured to perform the following operations: reducing a charge rate of the battery in response to a condition that the number of cycles of the battery exceeds a first threshold within a preset temperature range and / or in response to a condition that the cycling time of the battery exceeds a second threshold within a preset temperature range.

The application relates to the technical field of display, and discloses a pixel driving circuit and a control method thereof, a pixel driving assembly and a display panel. The pixel driving circuit comprises a data input module, a first input module, a second input module and a pixel electrode. The pixel electrode comprises a first capacitor and a second capacitor. The data input module is connected with the first input module and the second input module respectively. The first input module is connected with the first capacitor, the second input module is connected with the second capacitor, the first capacitor is connected with the second capacitor, and the connection end of the first capacitor and the second capacitor is connected with a common voltage end. Therefore, the application can solve the problem of uneven picture display caused by low charging rate due to insufficient pixel charging time at high refresh frequency.

To suppress fluctuation of a DC bus voltage within a predetermined range, and to control a charging rate of a power storage device without requiring switching of a control rule.SOLUTION: The charge / discharge control device 30 includes a discharging voltage controller 31 that outputs a discharging target current value for increasing the bus voltage when the bus voltage is lower than a predetermined discharging start voltage value, a charging voltage controller 32 that outputs a charging target current value for decreasing the bus voltage when the bus voltage is higher than a predetermined charging start voltage value, a charging rate controller 33 that outputs a charging rate target current value for keeping the charging rate of the power storage device within a predetermined range, a current command value setting unit 34 that calculates a current command value using the discharging target current value, the charging target current value, and the charging rate target current value, and a control signal generator 38 that generates a control signal for the power converter based on the current value of the power storage device and the current command value.SELECTED DRAWING: Figure 3

Systems and methods for estimating battery degradation of a battery energy storage system (BESS) are disclosed. An iterative process is performed within a predefined period of time divided into a plurality of iterations. For each iteration, an average temperature of the BESS is determined by inputting a state of health (SOH) and a charge rate into an average temperature lookup table (LUT). The SOH for the next iteration is determined by inputting the determined average temperature into a set of cell degradation equations. A charge rate for the next iteration is derived from a usage profile defining charge and discharge cycles over a predefined time period and including power and SOC over the predefined time period. The SOH of the BESS within the predefined time period may then be displayed on the user interface.

The invention discloses a direct current charging adjustable method and a new energy source vehicle, and the method comprises the steps: setting a direct current fast charging multiplying power through the interaction between a cellphone APP, an instrument or an MP5 and a vehicle control unit; in the next direct current fast charging process, the A + awakens the VCU and the electric BMS; the VCU sends the charging allowing signal and the setting result of the direct current fast charging rate to the BMS; the BMS recalculates the charging request current according to the setting result of the direct current fast charging rate; the BMS sends the recalculated charging request current to the charging pile; and the charging pile performs charging according to the recalculated charging request current. According to the direct-current charging adjustable method and the new energy source vehicle, the direct-current charging mode is adjustable; the set multiplying power is adjustable, so that the charging multiplying power is actively reduced, the charging energy value is increased, the service life of the battery is prolonged, and the endurance mileage is increased; and the problem of large voltage difference caused by long-term 2C super fast charging is reduced, and the charging energy complementing efficiency can be improved.

The invention relates to the technical field of lithium ion batteries, and particularly provides a charging and discharging method of a lithium ion battery. The invention aims to solve the problem of poor cycle performance of the lithium ion battery of the existing blending system. Therefore, the charging and discharging method of the lithium ion battery comprises the following steps: charging the lithium ion battery according to a first constant-current charging mode until the voltage reaches V1, and then converting into a first constant-voltage charging mode; continuously charging according to the first constant-voltage charging mode, and switching to a second constant-current charging mode until the charging rate is reduced to a second charging rate C2; continuously charging according to a second constant-current charging mode, and switching to a second constant-voltage charging mode until the voltage reaches Vmax; continuously charging according to a second constant-voltage charging mode until the charging rate is reduced to a cut-off charging rate Cmin, and stopping charging; and / or, the lithium ion battery discharges according to the first constant-current discharge mode until the voltage is reduced to V2, and then the lithium ion battery discharges according to the second constant-current discharge mode.

A speculation system, a speculation method, and a vehicle are disclosed. The speculation system includes an electrical storage device and one or more processors. The one or more processors are configured to execute: a charging process that controls a charging device to charge the electrical storage device; and a speculation process that speculates a full charge capacity of the electrical storage device. The one or more processors are configured to execute the charging process on the basis of setting an upper limit charge rate of the electrical storage device to a value greater than a first upper limit charge rate that is an upper limit charge rate in a case where a predetermined condition is not satisfied, in a case where the predetermined condition is satisfied.

A vehicle battery system for electrified vehicles is depicted. The system includes a traction battery with arrays immersed in cooling fluid and a pump that circulates the fluid. The pump incorporates a circuit configured to detect current flow through the cooling fluid from the traction battery to the circuit indicating fluid contamination or an insulation fault. This circuit can be coupled to either high- or low-voltage pumps. A battery management system receives data from the circuit, reports contamination levels, and can trigger responses that include disabling arrays or adjusting charging rates.

A nonaqueous electrolyte power storage element according to one aspect of the present invention is provided with: a positive electrode which has a positive electrode active material layer that contains a positive electrode active material; and a negative electrode which has a negative electrode active material layer that contains a negative electrode active material. The negative electrode active material contains silicon oxide, and the mass per unit area of one negative electrode active material layer is 2 mg / cm2 or more. The ratio QCX / QAX of the initial irreversible capacity QCX per unit area of the positive electrode to the initial irreversible capacity QAX per unit area of the negative electrode is 1.5 or more, and the charge rate S of the negative electrode in a discharged state of the nonaqueous electrolyte power storage element per 1 mass% of the silicon oxide content in the negative electrode active material is 0.7% / mass% or more.

The present disclosure belongs to the technical field of electrochemistry, and discloses a battery cell charging control method, a type determination method, a system, a device and a medium. The battery cell charging control method comprises: determining a target charging rate of a battery cell to be measured according to the type of the battery cell to be measured, a preset swelling force of the battery cell, and a charging swelling force corresponding to a charging rate model of the battery cell in a charging process; wherein the preset swelling force of the battery cell is a recommended swelling force threshold of the battery cell; and controlling the battery cell to be measured to be charged at a charging rate not exceeding the target charging rate. The battery cell charging control method can predict the target charging rate of the battery cell to be measured, and control the battery cell to be measured to be charged at a charging rate not exceeding the target charging rate in a subsequent charging process, thereby preventing the battery cell from swelling excessively and improving the performance and safety of the battery cell.

This invention discloses a charging control method for lithium metal batteries that can improve cycle life, belonging to the field of battery charging technology. Firstly, it uses a charging rate C... c Charging for a certain period of time t c Then, at a discharge rate C d Discharge for a certain time t d This cycle continues until the charging cutoff voltage reaches 4.35V, where the charging rate C... c With discharge rate C d Satisfies: 0.1 ≤ discharge rate C d / Charging rate C c ≤0.5, charging time t c Satisfy: 0 < charging time t c ≤2s, charging time t c With discharge time t d Satisfy: 0 < discharge time t d / charging time t c ≤0.5. This invention discloses a lithium metal battery charging control method that can improve cycle life, eliminate lithium dendrite growth, shorten current charging time, and extend battery cycle life.

The purpose of the present invention is to achieve more efficient energy output control in a railway vehicle that travels using a hybrid power source. A power control system (100) for a railway vehicle is provided with: a fuel cell (32) capable of outputting power for driving a main motor (50) and auxiliary equipment (70) of a railway vehicle (1); a battery (22) capable of storing power using the output of the main motor (50) or the fuel cell (32), and capable of outputting power for driving the main motor (50) and the auxiliary device (70) by discharging; and a control device (10) for switching the operation modes of the fuel cell (32) and the storage battery (22) on the basis of the charging rate of the storage battery (22), the speed of the railway vehicle (1), and the cooling water temperature of the fuel cell (32).

The present invention relates to a silicon-based anode active material capable of improving the charging rate and lifespan characteristics of a lithium secondary battery, and an anode and a lithium ion battery comprising same. The silicon-based anode active material for a lithium secondary battery, according to the present invention, comprises: a silicon-based material in a powder form; and iodine adsorbed on the silicon-based material. Iodine included in a silicon-based anode active material allows an iodine-based solid electrolyte interphase (SEI) to be formed on the surface of the anode so as to stabilize interface properties of the SEI.

The application provides an intelligent charging and discharging management system and method for a lithium battery module, and relates to the technical field of battery charging and discharging management. After detecting a charging connection signal, a relaxation curve of a cell terminal voltage decay over time is collected and fitted to determine a polarization voltage amplitude and a polarization relaxation time constant at the current time; according to the current state of charge, the target state of charge and the maximum allowable charging rate, the theoretical shortest charging time, the waitable time and the latest starting time are calculated; according to the waitable time, the current temperature of the lithium battery module and the current cycle number of the lithium battery module, the highest tolerable polarization voltage value is determined; the waitable time is taken as the upper limit of the time budget, and the polarization voltage amplitude is not greater than the highest tolerable polarization voltage value as a necessary condition, and the earliest time that meets the necessary condition in the time interval from the current time to the latest starting time is taken as the best charging starting time. The charging efficiency of the lithium battery module is improved.

The present invention relates to an electrolyte for a lithium secondary battery capable of improving the charging rate and lifespan characteristics of a lithium secondary battery, and a lithium secondary battery comprising same. The electrolyte for a lithium secondary battery comprises: a lithium salt; a solvent; and an additive, wherein the additive comprises a chlorine-substituted cyclic carbonate-based compound and a sulfone-based compound.