7results about How to "Avoid excessive discharge" patented technology

The invention discloses an electric vehicle V2G discharge cooperative control method and system based on a dynamic threshold value, and relates to the technical field of electric vehicle and intelligent power grid interaction, and the method comprises the steps: carrying out the data collection from a sensor and a data collection terminal of a power grid dispatching center, an electric vehicle-mounted terminal, and a charging pile communication module; the method comprises the following steps: collecting data of an electric vehicle, preprocessing the collected data, constructing a multi-dimensional dynamic threshold model based on a preprocessed data set, calculating three types of core thresholds, dividing an electric vehicle cluster and distributing discharge tasks after calculation, performing hierarchical cooperative discharge control execution, and performing multi-target optimization and threshold dynamic correction. And monitoring and terminating the discharge process according to the results of optimization and threshold correction. According to the control method, the state of the power grid is adapted in real time through the dynamic threshold value, the discharge response time in an emergency scene is effectively shortened, the frequency fluctuation of the power grid is effectively controlled, the voltage fluctuation is also effectively controlled, and the stability of the power grid is improved compared with the prior art.

The LED emergency power supply comprises an LED light source, a driving power supply and an emergency power supply, the output end of the driving power supply is connected with the LED light source, the emergency power supply comprises a wiring port, a battery pack and an inverter unit, the wiring port comprises an input connecting end, an output connecting end and a control connecting end, a mains supply is connected with one end of the input connecting end, and the other end of the input connecting end is connected with the inverter unit. The other end of the input connection end is connected with the input end of the inversion unit, the output end of the inversion unit is connected with the input end of the battery pack, the output end of the battery pack is connected with one end of the output connection end, and the other end of the output connection end is connected with the input end of the driving power supply. And emergency electric energy is provided for the LED light source. Through the arrangement of the wiring port, the emergency power supply can adapt to various built-in LED lamps integrated with the driving power supply in the market, so that when the LED emergency lamp is maintained or upgraded, the emergency power supply does not need to be additionally changed, a user can conveniently select LED lamps of different specifications and models according to requirements, the maintenance cost is reduced, and the compatibility and flexibility of the emergency power supply are improved.

The application relates to the field of power electronics, and discloses a battery power balance system and an electric vehicle, which comprise: a first power supply branch, the first power supply branch comprising a first power battery pack, a first inverter and a first traction motor, the first inverter being used for converting direct current of the first power battery pack into alternating current to provide the first traction motor; a second power supply branch, the second power supply branch comprising a second power battery pack, a second inverter, a third inverter, a second traction motor and an auxiliary motor, the second inverter being used for converting direct current of the second power battery pack into alternating current to provide the second traction motor, and the third inverter being used for converting direct current of the second power battery pack into alternating current to provide the auxiliary motor; and a battery power balance circuit, the battery power balance circuit being used for balancing the power of the first power battery pack and the second power battery pack. The application solves the problem of how to prolong the service life of a power battery, improves the utilization rate of the power battery, and prolongs the service life of the power battery.

The present disclosure provides a kind of energy storage system and its capacity equalization method, device, it is related to energy storage technical field.Energy storage system includes at least one battery cluster, battery cluster includes power module and multiple battery modules, the method includes: obtaining the residual capacity SOC of each battery module in target battery cluster;Wherein, target battery cluster is one in at least one battery cluster;If the SOC of multiple battery modules in target battery cluster does not satisfy preset equalization condition, then according to the SOC of multiple battery modules, determine the battery module to be equalized from multiple battery modules;Control power module switches to the battery module to be equalized and carries out power supply, to make the SOC of multiple battery modules in target battery cluster satisfy preset equalization condition.The present disclosure can realize the SOC equalization of multiple battery modules in target battery cluster, reduce energy loss, save energy, guarantee power module reliability, improve the communication stability of overall energy storage system.

This application belongs to the field of battery parameter estimation technology, and particularly relates to a battery SOC estimation method, apparatus, device, and medium based on Kalman filtering. The solution provided in this application addresses the problem that small errors in SOC estimation of lithium iron phosphate batteries caused by the battery voltage plateau period in traditional Kalman filtering methods have a significant impact. Based on the Kalman filtering algorithm, an improved formula is introduced, and the value of the voltage plateau period gain G in the improved formula is determined, effectively improving the SOC estimation accuracy for lithium iron phosphate batteries. Accurate SOC estimation ensures maximum battery utility, reduces costs, and prevents resource waste.

The application provides an extremely low-temperature starting battery system and relates to the technical field of battery thermal management, and comprises a receiving module, a obtaining module and a judging module.The receiving module is used for receiving an externally input charge-discharge request instruction and analyzing the instruction to obtain a standardized request type parameter.The obtaining module is used for starting a multi-path temperature acquisition process according to the standardized request type parameter, and obtaining environment temperature and battery temperature data to obtain current temperature state information.The judging module is used for dividing the environment temperature into preset extremely low-temperature intervals, normal low-temperature intervals and non-low-temperature intervals according to the request type parameter and the environment temperature data in the current temperature state information to obtain a temperature interval division result, and judging a heating starting condition based on the division result and the request type parameter to obtain a judgment result.The application realizes safe and efficient charge-discharge starting of the battery under extremely cold conditions.