23results about How to "Prevent overdischarge" patented technology

The invention belongs to but not limited to the technical field of new energy, particularly relates to a battery physical and chemical model parameter identification method and system based on different temperature impedances, aims to improve the accuracy of model simulation, considers contact resistance when establishing a one-dimensional P2D physical and chemical model of a battery, and simultaneously solves the problem that the model parameters are more and difficult to identify. In order to solve the problems that in the prior art, parameters with high sensitivity and medium sensitivity and meeting actual conditions are selected by adopting a parameter sensitivity analysis method, finally, the parameters selected under different working conditions are identified by adopting a grey wolf optimization algorithm, simulation EIS data are compared with actual measurement data, and the simulation accuracy of the model is influenced by excessive parameters. The result shows that the grey wolf optimization algorithm realizes accurate identification of the parameters of the one-dimensional P2D physical and chemical model of the battery. The method disclosed by the invention achieves remarkable results in the aspects of battery modeling and parameter identification.

The invention provides a battery management system design method applied to a direct-current photovoltaic micro-grid. The system comprises a data acquisition and monitoring module, an intelligent algorithm analysis module and a dynamic balance management module. Parameters such as voltage, current and temperature of the battery pack are collected in real time through a sensor, data are processed and analyzed through big data analysis and a machine learning algorithm, and the health state and the residual life of the battery pack are predicted. And the system dynamically adjusts the charging and discharging states of each battery unit according to an analysis result, so that the over-charging and over-discharging phenomena are avoided, and the service life of the battery pack is prolonged. According to the intelligent battery management system, the operation efficiency and reliability of the photovoltaic micro-grid are improved, and remarkable economic and social benefits are achieved.

The safe storage cabin comprises a main monitoring system, a heat dissipation fire fighting system and a cabin body, a plurality of energy storage electric cabinets are stored in the cabin body, and a main energy storage converter, a main transformer and an electric cabinet management system which are connected with the energy storage electric cabinets are fixedly arranged in the cabin body; the cabin body is provided with a cabin door, the cabin door is provided with a display panel and a cabin body management server, and the cabin body management server is electrically connected with a valve of the fire sprinkler, the main monitoring system, the main energy storage converter, the main transformer, the electric cabinet management system, a control mechanism of a roller shutter type fireproof blanket in the heat dissipation fire extinguishing system and the display panel; the main monitoring system transmits detected signals to the cabin management server, the cabin management server controls the operation states of the roller shutter type fireproof blanket, the fire sprinkler, the main energy storage converter, the main transformer and the electric cabinet management system according to the received signals, operation data are displayed through the display panel, large-scale management of the energy storage electric cabinet is achieved, and the energy storage electric cabinet management efficiency is improved. The energy storage cost is reduced, and the space utilization rate is improved.

This invention provides an extreme energy-saving range control method and system for new energy vehicles, comprising: acquiring vehicle operating status information and adaptively activating an energy-saving range mode based on the operating status information; dividing the vehicle's battery rated capacity into a normal driving stage range and an emergency driving stage range according to a ratio based on the activation result, and adaptively adjusting the vehicle's power output and accessory energy consumption based on the vehicle's real-time battery level in the normal driving stage range; adjusting the vehicle's standard operating procedures when the vehicle's battery level enters the emergency driving stage range, and prohibiting the vehicle from driving when the battery level reaches 0. This method effectively extends the vehicle's driving range, avoids battery over-discharge, and better meets user needs and vehicle protection requirements.

The invention discloses an energy storage power station equalization control method and device considering SOC feedback, and the method comprises the steps: measuring the terminal voltage of an energy storage unit, and calculating the SOC value of the energy storage unit through combining the terminal voltage with a voltage characteristic curve; comparing the SOC value with a threshold range, and determining a working electric quantity interval of the energy storage unit according to a comparison result; the threshold range represents a critical value of safe work of the energy storage unit; and carrying out corresponding charging and discharging power limitation according to the working electric quantity interval of the energy storage unit so as to realize SOC balance of different energy storage units. According to the invention, the charging and discharging power is limited according to the working electric quantity interval of the energy storage unit, so that the SOC balance of different energy storage units is realized, and overcharging and overdischarging are avoided.

The invention discloses an SOC calculation method and system suitable for a super capacitor module, and the method comprises the steps: determining the voltage use range of a super capacitor monomer, and the voltage use range comprises a voltage use lower limit and a voltage use upper limit; collecting the current voltage value of the super capacitor monomer in real time; according to the characteristics of the charging and discharging characteristic curve of the super capacitor, the SOC value of the super capacitor monomer is calculated; taking the calculated SOC value of the single super-capacitor as the SOC value of the super-capacitor module, or performing weighted average processing according to the SOC value of each single body in the super-capacitor module to obtain the SOC value of the super-capacitor module; and error correction: dynamically correcting an SOC calculation result, and adapting to the condition that the performance of the super capacitor changes along with environmental conditions. The SOC is calculated by utilizing the characteristic that the charge and discharge characteristic curve of the super capacitor tends to be linear, and the relationship between the voltage and the SOC is relatively linear in the charge and discharge process of the super capacitor, so that the SOC of the super capacitor can be calculated more accurately, the precision requirement is met, and the calculation accuracy is remarkably improved.

The invention discloses an active online voltage balancing method and system based on battery circulation of a storage battery, and the method comprises the steps: obtaining a voltage value, an SOC value and a temperature value of each single storage battery in a storage battery pack, and judging whether the storage battery pack needs to be balanced or not; if yes, determining a target equalization single storage battery in the storage battery pack and a source single storage battery in an equalization circuit; controlling the equalization circuit, and transmitting the electric energy of the source single storage battery to the target equalization single storage battery through the equalization circuit; in the electric energy transmission process, the transmission current and the transmission time of the equalization circuit are dynamically adjusted by adjusting the working state of the corresponding equalization module in the equalization circuit; after the equalization is completed, judging whether the voltage, the SOC value and the temperature of each single storage battery in the storage battery pack are equalized or not, and if so, stopping equalization; according to the invention, the equalization efficiency and precision are improved.

The invention discloses a storage battery control method, device and equipment and a medium, when it is detected that a vehicle is in a dormant state, if the residual electric quantity of a storage battery is smaller than an electric quantity threshold value, the storage battery is controlled based on a first control strategy, so that the storage battery is prevented from being lack of electricity; and when the vehicle is in the long-time parking state, if the residual electric quantity of the storage battery is larger than the electric quantity threshold value, the storage battery is controlled based on a second control strategy so as to avoid electricity shortage of the storage battery. The electric quantity of the storage battery can be well stored under the condition that the vehicle is not used for a long time or the electric quantity of the storage battery is low, and the trouble of secondary vehicle use caused by over-discharge of the storage battery is avoided; and after the storage battery is powered off, a user can be reminded in a friendly mode, the perceptible degree of the user is increased, and then the user experience degree is improved.

This application discloses an auxiliary power supply module and a power distribution terminal, belonging to the field of power supply. The auxiliary power supply module includes a charging circuit, an energy storage unit, a power failure detection delay circuit, a boost circuit, and a power output terminal. The charging circuit is connected to the energy storage unit and is used to charge the energy storage unit using the main power supply voltage when the main power supply voltage is normal. The power failure detection delay circuit is connected to both the charging circuit and the boost circuit and is used to output a working voltage to the boost circuit when the main power supply voltage is less than a first target voltage for a target duration. The energy storage unit is connected to the boost circuit and is used to output a stored energy voltage to the boost circuit. The boost circuit is connected to the power output terminal and is used to supply power at the working voltage, converting the stored energy voltage into a supply voltage and providing it to the power output terminal. The supply voltage is used to power the power distribution terminal. This application can improve the service life of the auxiliary power supply module and improve the stability of power supply.

The invention relates to the technical field of circuits, in particular to a battery overdischarge protection circuit and a control method thereof.The battery overdischarge protection circuit comprises a voltage detection module, a voltage comparison module and a switch module which are connected in sequence; the voltage detection module is used for dividing the battery voltage and then outputting the battery divided voltage; the voltage comparison module is used for outputting a low level when the battery voltage is not lower than the minimum working voltage of the voltage comparison module and if the battery voltage is reduced to be lower than a drop voltage threshold value and the battery partial voltage is lower than the reference voltage accessed by the voltage comparison module, so as to control the switch module to disconnect a power supply loop of the battery to the load; if the voltage of the battery rises to be higher than the rising voltage threshold value and the divided voltage of the battery is higher than the reference voltage, outputting a high-resistance state to control the switch module to conduct a power supply loop of the battery to the load; according to the invention, over-discharge of the battery can be avoided, the battery is effectively protected, and the service life of the battery is prolonged.

The invention discloses a battery discharge rate and temperature rise prediction method, and belongs to the technical field of battery prediction. Comprising the following steps: acquiring polarization resistance Rx, polarization capacitance Cx, open-circuit voltage VOC and internal resistance Rs of a battery, building an equivalent circuit model, optimizing the equivalent circuit model by using a relation curve L to obtain an optimized model, and calculating the polarization resistance Rx, the polarization capacitance Cx, the open-circuit voltage VOC and the internal resistance Rs of the battery. Solving and iterating the open-circuit voltage VOC corresponding to the discrete temperature by using a square root of a state covariance matrix of a square root volume Kalman filtering algorithm, introducing a compensation model, optimizing an optimization model by using the compensation model to obtain a pre-estimation model, calculating a theoretical temperature rise value of the pre-estimated discharge depth in combination with the pre-estimation model, and calculating the temperature rise value of the pre-estimated discharge depth in combination with a current cell temperature rise deviation. The current environment temperature is used for predicting the temperature of the discharge tail end. According to the invention, the parameters of the prediction model are dynamically adjusted according to the temperature change of the actual operation environment of the battery, and the prediction accuracy of the discharge end temperature of the battery is improved.

The present invention provides a power switch circuit device and a control method, including: a power switch circuit, a voltage detection circuit module and a main power supply; the voltage detection circuit module includes: a first voltage detection circuit and a second voltage detection circuit; the first voltage detection circuit is connected to the power switch circuit; the power switch circuit is connected to the second voltage detection circuit; the power switch circuit includes: a resistor R1, a resistor R2, a capacitor C3, a triode Q1, a triode Q2 and a triode Q3; one end of the resistor R1 is connected to the triode Q1 and the triode Q2; the other end of the resistor R1 is connected to the triode Q3; the present invention uses a battery capacitor as a backup power supply, achieving advantages in cost and volume. After the main power is off, the present invention can turn off the power supply circuit of the battery capacitor after the system completes the power-off operation to prevent over-discharge of the battery capacitor.

The invention relates to the technical field of energy storage equipment, and discloses an equalizing charging method for an energy storage device, the energy storage device and equipment, and the method comprises the steps: carrying out the pre-charging of the energy storage device, and carrying out the sorting of SoC values of a plurality of energy storage units on each phase of line under the condition that the DC side voltage is stable; performing partial dynamic cutting on the plurality of energy storage units on each phase of line according to the sorting result, and determining that the energy storage device completes pre-charging under the condition that the SoC values of the remaining energy storage units after cutting all reach a preset value; and performing grid-connected operation on the pre-charged energy storage device, performing in-phase equalization control on the plurality of energy storage units on each phase line according to the total SoC mean value and the in-phase SoC mean value of the energy storage device, performing inter-phase equalization control on the energy storage device according to the negative sequence component of the three-phase alternating current power grid, and quickly charging the energy storage device through a power ring. According to the invention, the over-charge or over-discharge phenomenon of individual energy storage units can be avoided, and the reliability of the energy storage device is greatly improved.

The invention relates to a power supply management method based on an automatic load rejection strategy. The method comprises the steps of collecting a storage battery terminal voltage as a sampling voltage; when the sampling voltage is smaller than an under-voltage alarm voltage threshold value, under-voltage alarm is carried out, and meanwhile, a power supply of current task equipment is cut off according to a load rejection sequence; judging whether the sampling voltage is smaller than an under-voltage protection voltage threshold value or not; when the sampling voltage is reduced to be smaller than the under-voltage protection voltage threshold value, emergency alarm is carried out, and power supplies of all current task equipment are cut off; after the sampling voltage is smaller than the under-voltage protection voltage threshold for a certain duration, cutting off the power supply of all key equipment; and when the voltage rises to the protection cut-off recovery threshold value, switching on the power supply of the key equipment. Based on a simple voltage judgment method, the automatic load rejection strategy is used for power management, the operation time of passengers is saved, the utilization rate of electric energy is increased, the use condition of a power grid is improved, and safe and reliable operation of the system is further guaranteed.

A new energy elevator belongs to the technical field of elevators and comprises an elevator control device and an elevator power supply system, and the elevator power supply system comprises a photovoltaic power supply device, a power switching circuit system, a mains supply, a power supply output controller, a first storage battery and a second storage battery; the power supply switching circuit system comprises a first power supply switching switch, a second power supply switching switch and a third power supply switching switch which are connected and controlled by a power supply output controller; a connecting end of the first power supply switching switch is connected with a photovoltaic power supply device, a first storage battery and a second storage battery; the connecting end of the second power supply change-over switch is connected with the third power supply change-over switch, the first storage battery and the second storage battery; and the connecting end of the third power supply change-over switch is connected with the elevator control device and the mains supply. According to the elevator power supply system, through the integrated photovoltaic power supply, double-storage-battery energy storage and intelligent switching technology, the reliability and energy efficiency of elevator power supply are improved, dependence on the mains supply is reduced, and environment-friendly and low-carbon operation of an elevator can be guaranteed.

The utility model discloses a kind of shield method tunnel slag soil prevents comprehensive monitoring equipment of over-discharge, comprising: flow sensor, install in the conveying pipeline of shield method tunnel slag soil;Slag soil conveyor, the output of the conveying pipeline is connected in the input of the slag soil conveyor;Portal, set in the middle part of the slag soil conveyor, the two columns of the portal are respectively set in the opposite sides of the slag soil conveyor;Laser scanner, install on the crossbeam of the portal and align in the middle part of the slag soil conveyor;Weighing device, install between the two columns, the tray of the weighing device is supported in the middle part of the slag soil conveyor to avoid the middle part of the slag soil conveyor produces deformation.The utility model solves the problem that the existing shield tunnel construction process slag soil quantity monitoring is not enough exquisite, monitoring means single.

This utility model relates to the field of microphone technology, specifically to an intelligent wireless microphone, comprising a battery module, a charging module, a control module, a first comparison module, and a second comparison module. The battery module includes a lithium battery, which is connected to the control module for power supply via a voltage regulator module. The charging module charges the lithium battery. When the lithium battery voltage is lower than a first voltage, the first comparison module outputs an alert signal to the alert module. When the lithium battery voltage is lower than a second voltage, the second comparison module outputs a power-off signal to the voltage regulator module, causing the control module to lose power. The battery module also includes a battery protection chip that disconnects the lithium battery's discharge circuit when the lithium battery voltage is lower than a third voltage, where the first voltage is greater than the second voltage, and the second voltage is greater than the third voltage. This utility model provides an intelligent wireless microphone that is rechargeable, highly intelligent, provides low battery alerts, prioritizes power supply, and prevents over-discharge.

The invention, which belongs to the field of the new energy storage system, discloses a light energy conversion energy storage system comprising a photovoltaic array, a power converter, an energy management unit and an energy storage unit. The photovoltaic array obtains solar radiation energy, and generated direct-current electric energy is modulated through the power converter; the energy management unit determines a charging and discharging strategy of the energy storage unit according to the direct-current electric energy generated by the photovoltaic array and the charge state of the energy storage unit, or directly outputs the direct-current electric energy to a load; the energy storage unit is configured to receive the modulated electric energy when the charge state of the energy storage unit does not meet the power demand of the load, and the energy management unit determines a charging and discharging strategy according to the direct current electric energy generated by the photovoltaic array and the charge state of the energy storage unit, thereby achieving the effective management and distribution of the electric energy, improving the overall efficiency of the system, and reducing the power consumption of the system. And the system can select to directly supply power to the load or store the power in the energy storage unit according to actual conditions, so that the flexibility and adaptability of the system are enhanced.

A vehicular power supply system (100) includes a sensor unit (20) that detects a battery state of a storage battery (11) and a control unit (30) that performs instruction to perform energization and interruption of the energization between the storage battery and the electrical load (13) based on the battery state. The sensor unit includes a detection unit (21) that detects the battery state of the storage battery, a switch drive unit (23) that performs drive control of a switch unit (23a) provided between the storage battery and the electrical load, and a control unit (24) that controls the switch drive unit. The control unit switches between the energization and interruption of the energization between the storage battery and the electrical load. If determining an abnormality, the control unit determines whether to maintain the energization between the storage battery and the electrical load based on the battery state and switches between the energization and interruption of the energization based on the determination.

The present application relates to an energy storage power supply device, a control method, a control device and a single-chip computer. The device includes: an energy management unit, a battery control unit, N battery systems, and N bidirectional power converters electrically connected to each of the battery systems, wherein the energy management unit is connected to an external power grid to obtain the current power demand and output the current power demand to the battery control unit. The battery control unit is used to obtain battery information from each battery system, and determine the control signal for each battery system based on the current power demand and the battery information of each battery system, and output the control signal for the battery system to the bidirectional power converter electrically connected to the battery system. The bidirectional power converter is used to control the charging current or discharging current of the battery system electrically connected to the bidirectional power converter according to the received control signal. The use of this method can make full use of the battery capacity of each battery system.

The application discloses an electrochemical energy storage control method and system, and relates to the field of electrochemical energy storage. The method comprises the following steps: acquiring real-time data, estimating the residual power of an energy storage device according to the real-time data; obtaining a power difference value according to the relationship between the residual power, the maximum safe power and the minimum safe power; calculating a charging / discharging power adjustment coefficient according to the standard charging / discharging power and the power difference value, thereby optimizing the charging power and the discharging power, achieving the balance of charging and discharging, and improving the service life of the energy storage device. According to the real-time internal resistance, the used period, the total charging power and the total discharging power of the energy storage device, the health state of the energy storage device is calculated, and the maximum safe power and the minimum safe power are dynamically adjusted according to the health state, so that the energy storage device can safely complete the charging and discharging work after being used for a certain period of time, even if the health state is not at the factory setting, and the safety and service life of the energy storage device are improved.

The invention discloses a series power generation control method for an extended-range light commercial vehicle, and the method comprises the steps: 1, obtaining the driving information of the vehicle through a CAN bus, and the driving information comprises the driving speed, driving force, driving acceleration and the like of the vehicle; estimating the mass of the vehicle by using a recursive least square method with a forgetting factor; 2, grading the estimated vehicles according to mass ranges, wherein the vehicles are divided into low loads, medium loads, high loads and the like; 3, selecting different power generation modes according to the identified quality grade, the current vehicle speed and the SOC of the battery; 4 series power generation modes are mainly divided into a fixed-point low gear, a fixed-point middle gear, a fixed-point high gear and a power following mode, the power generation power of an engine does not depend on the power requirement of a driver after mass recognition, and the power following mode is adopted for power generation only when the vehicle is in a high load and the electric quantity is too low; and 5, after the working point of series power generation is determined, control is conducted according to the target working rotating speed and torque of the engine, the rotating speed of the engine is adjusted and controlled through PID, the rotating speed of the engine is adjusted through the torque of the generator, the difference between the actual rotating speed of the engine and the target rotating speed can be controlled within 100 rmp, the economical performance of the vehicle can be improved, and the vehicle safety is improved. And the vehicle always works in a high-efficiency area.

The invention relates to the technical field of LED lighting, in particular to a charging system of an omnibearing solar LED street lamp, which comprises a charging and discharging threshold value determining module, a charging and discharging threshold value determining module, a charging and discharging threshold value determining module, a charging and discharging threshold value determining module and a charging and discharging threshold value determining module, the historical data acquisition module collects historical illumination, energy consumption, environment, weather, illumination and power generation data of the street lamp and generates historical data of the solar LED street lamp. The energy consumption and generating capacity prediction module predicts the energy consumption demand and the solar generating capacity of the day according to the historical data of the solar LED street lamp. And the charging module obtains battery parameters and formulates a charging strategy in the charging time period, and the battery and the standby energy storage device are charged by using the strategy. And the discharging module obtains battery parameters in a discharging time period, formulates a discharging strategy, and supplies power to the street lamp through the battery and the standby energy storage device according to the strategy. The system realizes intelligent management of charging and discharging of the solar LED street lamp, and is helpful for prolonging the service life of a battery.