898 results about "Residual charge" patented technology

The invention discloses an automatic identification and expansion communication method based on an RS485 interface, and relates to the technical field of industrial automation communication. The problems that an existing RS485 interface is complex in configuration, poor in protocol compatibility and high in data transmission delay are solved. According to the scheme, the terminal matched resistance and the bias current are adjusted in real time by dynamically measuring the bus equivalent distributed capacitance value, and signal attenuation caused by the capacitance effect is inhibited; a silicon controlled rectifier trigger type charge discharge mechanism is adopted to force bus residual charge to return to zero quickly, and an idle state is accurately judged in combination with a hysteresis comparator; dynamically compensating signal edge distortion and calibrating a sampling window time sequence based on a pre-emphasis filtering and Kalman filtering algorithm; multi-node stable communication is realized through capacitance value driven conflict detection threshold adaptive adjustment and a Poisson back-off model; according to the invention, the real-time performance, the anti-interference capability and the multi-node expansion reliability of RS485 communication in a complex industrial scene are obviously improved, and the debugging and maintenance cost of the system is reduced at the same time.

The invention discloses a power supply method and a power supply system for on-line monitoring equipment of a lightning arrester, and the method specifically comprises the steps: activating a multi-source energy module according to a preset priority order based on the operation state and environment parameters of the lightning arrester, and supplying power to the on-line monitoring equipment; based on the output characteristics of the multi-source energy module and the residual electric quantity of the on-line monitoring equipment, a constant voltage-constant current hybrid power supply strategy in a conventional mode or an anti-interference power supply strategy in an abnormal mode is executed on the on-line monitoring equipment; and processing the historical leakage current, environmental temperature and humidity and vibration spectrum characteristics of the lightning arrester acquired by the online monitoring equipment through the LSTM prediction model, predicting the energy supply trend of the online monitoring equipment in the preset future time, and dynamically adjusting the working parameters of the online monitoring equipment according to the energy supply trend. According to the invention, stable power supply of the lightning arrester on-line monitoring equipment in a complex environment is realized, and the power supply reliability and the equipment availability are improved.

The invention relates to a charging station management method and system based on an intelligent box, and relates to the field of the vehicle charging technology, and the method comprises the steps: obtaining the overall power of a power grid and the charging demand power of each current charging pile; determining the overall required power according to each charging required power, and determining the available power of the power grid according to the overall power of the power grid and the anti-disturbance coefficient; when the overall demand power is greater than the available power of the power grid, acquiring the battery capacity percentage, the residual charging duration and the vehicle priority coefficient of each vehicle according to each charging pile; calculating according to the battery capacity percentage, the residual charging duration and the vehicle priority coefficient to determine a vehicle basic weight; and calculating according to the available power of the power grid, the basic weight of the vehicle and the charging demand power to determine effective distribution power, and controlling each charging pile to operate at the corresponding effective distribution power. The method and the device have the effect of improving the charging experience when the vehicle is charged by using the charging station.

The invention relates to a method and device for confirming the number of battery packs in a battery system, the battery system, a computer readable storage medium and a computer program product. The method comprises the following steps: identifying a bus voltage of an accessed target battery system; the reference voltage of a single battery pack in the target battery system is obtained, and the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells contained in the battery pack in the state of the lowest residual electric quantity; determining a voltage ratio of the bus voltage to the reference voltage; and rounding the voltage ratio to obtain the number of battery packs in the target battery system. According to the method, the total bus voltage of the static battery system is directly identified, and then the number of the stacked battery packs in the system is determined through the ratio of the bus voltage to the reference voltage, so that the identification of the number of the battery packs can be realized without charging processing, and the efficiency of the battery pack number identification processing process can be effectively improved.

The invention relates to the technical field of battery management, in particular to a battery replacement cabinet battery real-time monitoring and scheduling method, the health state of a battery is analyzed and evaluated according to a preset algorithm model, and the health state of the battery is evaluated by comparing a comprehensive health score, an internal resistance change rate and a capacity fading rate with corresponding threshold values; and determining a corresponding processing mode based on the evaluation result, including generating and sending abnormal alarm information to the operation and maintenance terminal, or executing an adjustable charging mode according to the state of residual electric quantity of the battery, or executing a protective charging mode according to the deterioration degree of the battery, the health state of the battery is actively evaluated to accurately identify an abnormal battery, for example, the electric quantity may be not low but potential safety hazards exist, in advance, so that targeted charging scheduling can be realized. According to the invention, real-time monitoring and active protection of the health and safety state of the battery are realized, so that the operation efficiency is improved on the premise of ensuring the safety.

The invention provides a new energy automobile intelligent charging path planning method and device, a terminal and a medium, and belongs to the technical field of charging scheduling. The method comprises the steps that after a charging instruction of a user is obtained, state information of a plurality of candidate charging piles is obtained; wherein the state information comprises the position, the charging power, the charging price and the estimated available time period; based on the state information of each candidate charging pile and the user information of the user, the matching degree of each candidate charging pile and the demand of the user is evaluated; wherein the user information comprises a current position, a preferred charging degree and a residual electric quantity state; and based on the demand matching degree of each candidate charging pile, generating corresponding candidate charging paths and sorting the candidate charging paths, so that a user selects a target charging path from the candidate charging paths. According to the invention, the convenience of searching and using the charging pile by a user can be improved, and effective distribution and use of charging pile resources are promoted.

The invention relates to the technical field of battery heating, in particular to a battery heating control method and system, a medium and a vehicle. The method comprises the following steps: collecting the current temperature and the residual electric quantity of a power battery, determining the available electric quantity of the power battery according to the current temperature and the residual electric quantity, obtaining the target discharge power of the power battery according to the current temperature and the residual electric quantity, and obtaining the required electric quantity and the required power of a vehicle in a preset travel; and performing heating control on the power battery according to the required electric quantity, the required power, the available electric quantity and the target discharge power. In the application, whether to heat the power battery or not is judged according to the required electric quantity and the required power of the vehicle, and if the required electric quantity and the required power can meet the navigation planning path, the power battery does not need to be actively heated, so that extra power consumption caused by heating of the power battery is avoided, and the endurance mileage is improved.

The present invention relates to the technical field of battery recycling equipment, and in particular to a discharge device for recycling waste lithium batteries. The hoisting assembly includes winches arranged at intervals on a mounting frame, the ropes of the winches slide through the mounting frame, and the ends of the ropes of the winches are respectively connected to immersion frames, and the immersion frames are loaded with placement frames for placing batteries. Through the coordinated operation of the hoisting assembly, the loading and unloading assembly and the deployment assembly, differentiated discharge treatment of waste lithium batteries is achieved; by using the winch and the multi-stage telescopic cylinder in conjunction with the independent immersion frame and placement frame structure, targeted discharge can be performed on batteries with different remaining power conditions; at the same time, the loading and unloading assembly supports the independent transportation of batteries before and after discharge, providing guarantees for continuous and batch operations, and the deployment assembly can adjust the brine ratio in real time to ensure a consistent electrolyte environment during the discharge process, thereby improving the stability of the discharge effect and the resource recovery rate.

The present invention relates to a new energy ship battery power control method and a system. Each battery pack correspondingly supplies power to one bus, one bidirectional DC-DC converter is arranged between two adjacent buses to form a bus loop, and a load correspondingly draws electrical power from a corresponding bus loop segment; a power supply state of each bus area is checked, and by controlling the bidirectional DC-DC converter between buses, surplus energy of one bus is distributed to another bus having insufficient energy. According to the solution, a low DC-DC capacity configuration is achieved, energy between battery packs can be flexibly scheduled, the remaining electrical power between battery packs can be effectively balanced, the system risk is low and controllable when a bus is short-circuited, the power performance of a ship is not reduced when a single point of failure occurs, and the reliability and safety of the ship are effectively improved.

The invention discloses an energy storage monitoring method and system, electronic equipment and a storage medium, and relates to the technical field of energy storage. The method comprises the following steps: acquiring voltage data and temperature data of a plurality of different types of battery units; generating a voltage response curve of the corresponding battery unit based on each voltage data, and generating a temperature response curve of the corresponding battery unit based on each temperature data; dividing each battery unit into a plurality of battery packs with different charging and discharging characteristics according to each voltage response curve and each temperature response curve, and calculating the residual electric quantity value of each battery unit in each battery pack; in each battery pack, determining an electric quantity difference value between the battery units in combination with the residual electric quantity value of each battery unit, and taking each battery unit of which the electric quantity difference value is greater than an electric quantity threshold value as a target battery pair; and performing concurrent equalization adjustment on the power parameters of each target battery pair until the electric quantity difference value of each target battery pair is smaller than the electric quantity threshold value. By implementing the technical scheme provided by the invention, the overall energy storage efficiency can be improved.

The invention relates to the technical field of batteries, in particular to a battery electric quantity detection method, electronic equipment and a computer readable storage medium, and the method comprises the steps: reading an original voltage value of a battery through an ADC module, and calculating an actual voltage value; judging whether the battery is in a charging state or not according to the actual voltage value, obtaining a corrected voltage value according to a judgment result, obtaining a compensation value according to the corrected voltage value and the power supply state of the SOC main control chip, and further calculating a compensation voltage value; and updating the sliding window by using the compensation voltage value so as to determine the residual electric quantity of the battery according to the updated average voltage value of the sliding window. By combining voltage correction, a compensation mechanism and a sliding window technology, the stability and the accuracy of battery remaining capacity detection can be ensured, and an additional external voltameter or other peripheral circuits are not needed, so that the production cost of a product is remarkably reduced.

The invention discloses a multi-branch parallel battery pack discharge working condition circulation control method, device and equipment and a storage medium, and relates to the technical field of battery management, and the multi-branch parallel battery pack discharge working condition circulation control method comprises the following steps: detecting the state of charge of a multi-branch parallel battery pack, when the percentage of the residual electric quantity in the total capacity is smaller than a preset percentage, detecting the duration of the discharge working condition; when the duration of the discharge working condition is greater than a preset duration, determining a discharge current limit according to a discharge current difference value between branches, a maximum allowable discharge current, the lowest monomer voltage of the branch with the maximum discharge current, the current discharge power and the number of the branches; and when the duration of the discharge working condition is not greater than the preset duration, determining the discharge current limit according to the discharge current difference between the branches, the maximum allowable discharge current and the minimum monomer voltage of the branch with the maximum discharge current. The circulating current influence caused by the end of the discharge working condition can be reduced.

The invention provides a vehicle energy management method, a storage medium and a vehicle, and belongs to the technical field of vehicles. According to the embodiment of the invention, by comprehensively considering the plurality of battery parameters of the battery, the current residual electric quantity precision of the battery can be accurately identified, the appropriate target correction amount can be determined for the battery based on the current residual electric quantity precision, and the initial residual electric quantity threshold value is dynamically corrected based on the target correction amount to obtain the target residual electric quantity threshold value. On the basis of the target residual electric quantity threshold value, energy management can be performed on the battery more finely. Therefore, the battery energy can be used as much as possible on the premise of ensuring the use safety of the battery, so that the full utilization of the battery energy is realized, and the endurance mileage of the vehicle is effectively improved.

The invention discloses a battery charging management method and device, a surgical robot, equipment and a medium. The method comprises the following steps: under the condition that power is supplied to a plurality of operation platforms based on integrated central equipment and a standby battery corresponding to each operation platform is charged, determining available output power of the integrated central equipment relative to a plurality of standby batteries at the current moment; respectively determining a corresponding residual electric quantity calibration value of each standby battery at the current moment; and based on the residual electric quantity calibration value corresponding to each standby battery and the available output power of the integrated central device relative to the plurality of standby batteries, respectively determining the charging power corresponding to each standby battery at the current moment, and charging the corresponding standby battery based on each charging power at the current moment. According to the technical scheme of the embodiment, the effect of equalization adjustment of the charging process of a plurality of operation platform standby batteries is achieved.

The invention provides an integrated optimal scheduling method and system for a smart power plant, and belongs to the technical field of unit scheduling, and the method specifically comprises the steps: taking weather data as a basis, and when determining that the matching coefficient of the frequency modulation response data of the smart power plant in the remaining time period of the current date and the electric energy output of a new energy output device meets the requirement, determining that the new energy output device outputs the new energy output device; and obtaining frequency modulation response data of the smart power plant in the current time period of the current date and historical matching data of electric energy output of the new energy output device, and dynamically adjusting an energy storage utilization form of the new energy output device of the smart power plant in the current time period of the current date in combination with the residual electric quantity of an electric energy storage device of the smart power plant. Therefore, the flexibility of the unit is improved.

The invention provides a control method and device for an off-grid assembly type photo-hydrogen storage roof building module. The method comprises the steps that whether the real-time generated power of a photovoltaic power generation system meets a first electric quantity storage condition or not is judged; if the real-time power generation power of the photovoltaic power generation system meets the first electric quantity storage condition, judging whether the storable electric quantity of the battery energy storage system meets a second electric quantity storage condition or not; if the storable electric quantity of the battery energy storage system does not meet the second electric quantity storage condition and the storable electric quantity of the hydrogen storage system meets the hydrogen storage condition, inputting redundant electric quantity into the water electrolysis hydrogen production system; if the real-time power generation power of the photovoltaic power generation system does not meet the first electric quantity storage condition, whether the battery energy storage system has residual electric quantity is judged, and a residual electric quantity judgment result is obtained; and if the judgment result of the residual electric quantity is no, starting the hydrogen production system to supply hydrogen to the hydrogen fuel cell heat and power cogeneration system. Occupation of land resources can be reduced, the bottleneck of single energy storage can be broken through, and photo-hydrogen storage synergistic interaction is achieved.

The invention provides a method and device for discharging residual charges of an air conditioner and the air conditioner. The air conditioner at least comprises a capacitor charging control circuit, a bus capacitor circuit, a fan driving circuit, a main control chip and a fan load. The discharging method comprises the steps that the main control chip responds to a bus capacitor discharging instruction and outputs a control signal used for controlling a capacitor charging control circuit to be disconnected; and obtaining a capacitor voltage value of a bus capacitor in the bus capacitor circuit, and controlling the fan driving circuit to drive the fan load to work through the obtained capacitor voltage value. According to the invention, rapid and efficient discharge of the bus capacitor can be realized, and the hardware cost and the system complexity are reduced on the premise of not influencing the working efficiency of the air conditioner.

The invention provides a parameter correction method and device, a vehicle and a computer readable storage medium, and relates to the technical field of vehicle batteries, and the method comprises the steps: obtaining at least two groups of historical data of a battery pack; wherein each group of historical data comprises a historical accumulative charging amount, a historical accumulative discharging amount and a historical ampere-hour compensation value used for residual electric quantity correction; determining a target charging ampere-hour compensation coefficient and a target discharging ampere-hour compensation coefficient according to the at least two groups of historical data; under the condition that the compensation condition of the residual electric quantity is met, the residual electric quantity of the battery pack is corrected according to the target charging ampere-hour compensation coefficient, the target discharging ampere-hour compensation coefficient and the current accumulated charging quantity and the current accumulated discharging quantity of the battery pack. The method can improve the calculation accuracy of the remaining capacity of the battery pack.

The invention discloses a power grid frequency modulation method based on flywheel energy storage and electrochemical energy storage. The method comprises the following steps: S1, receiving an AGC instruction issued by an AGC dispatching center; s2, preferentially responding to the frequency modulation demand through flywheel energy storage, and adjusting the rotating speed of the flywheel in real time based on the instantaneous power output capability and the residual electric quantity of the flywheel so as to compensate for the high-frequency small-amplitude power deviation; s3, when the flywheel energy storage power or energy is insufficient, battery energy storage supplements response, the charge and discharge depth of the battery is limited according to the charge state of the battery, and the service life is prolonged; and S4, combining the actual ramp rate of the thermal power generating unit, dynamically distributing the output of the energy storage system, and forming a thermal power-hybrid energy storage combined frequency modulation model. The frequency modulation performance index is improved; through instantaneous response of flywheel energy storage and continuous support of a battery, the Kp value is improved from 3.7 to more than 4.2 by combining a frequency modulation system; and the service life of the battery is prolonged, and the replacement cost and the comprehensive cost are reduced by limiting the charge-discharge depth (the SOC range is 20%-90%) of the lithium battery and reducing the high-frequency charge-discharge times of the lithium battery.

The invention provides a robust two-way stacked electrostatic protection circuit, which comprises a two-way stacked electrostatic protection module and a floating charge discharge module, and is characterized in that the two-way stacked electrostatic protection module comprises at least one floating node, and the floating node can accumulate residual charges in the process of normal working of the circuit or electrical characteristic test characterization; the floating charge discharge module is composed of a state control module and a charge discharge module, and the state control module monitors the potential state of a floating node in real time and generates a control signal; the charge discharge module responds to the control signal to conduct and discharge charges accumulated by the floating node, the floating charge discharge module comprises an MOS transistor, the MOS transistor is connected with the first port through the state control module, a source electrode of the MOS transistor is connected with the floating node, and a drain electrode of the MOS transistor is connected with the second port. According to the series high-voltage ESD protection circuit, accumulated charges on the floating node in the series high-voltage ESD protection circuit can be discharged in time.

A battery temperature control method and apparatus, a medium, a device, and a vehicle. The battery temperature control method comprises: acquiring an amount of electricity remaining and a measured temperature of a battery (S101); on the basis of a preset mapping relationship, determining a target temperature range corresponding to the amount of electricity remaining (S102); comparing the measured temperature with the target temperature range, and heating or cooling the battery on the basis of a comparison result, such that the temperature of the battery is kept within the target temperature range (S103). In this way, the target temperature range of the battery can be controlled on the basis of the amount of electricity remaining in the battery, i.e.,, the temperature of the battery can be controlled to fall within different target temperature ranges on the basis of different amounts of electricity remaining in the battery. The target temperature range can be the temperature range that allows the battery to provide the maximum charging current with the current remaining electricity amount.

The invention relates to the technical field of power supply management, and discloses an intelligent management method and system for an uninterruptible power supply, and a storage medium. The method comprises the steps that the actual power of a load end is updated every first duration, and when a power supply end starts to supply power, the actual power is corrected based on the load volatility to obtain required power; starting at least one uninterruptible power supply based on the required power, so that the load utilization rate of the power supply end is within a standard range; defining the started uninterruptible power supply as a first power supply, obtaining the residual electric quantity and the electric quantity attenuation rate of the first power supply at intervals of second duration, and determining a high-risk power supply based on the residual electric quantity and the electric quantity attenuation rate; if the idle uninterruptible power supply exists in the power supply end, the idle uninterruptible power supply is online to replace the high-risk power supply, and otherwise, the load equipment is turned off; after the commercial power is recovered, the uninterruptible power supply in the power supply end is charged based on the charging priority, and sustainable balance between charging safety and the service life of equipment is achieved.

The invention provides a control method and system for connecting an energy storage inverter into a diesel generator and a power grid in parallel, and belongs to the technical field of electric energy dispatching. The control method for connecting the energy storage inverters into the diesel generator and the power grid in parallel comprises the following steps of S1, arranging the multiple energy storage inverters in parallel; s2, all the energy storage inverters are controlled to be started; s3, respectively acquiring real-time residual electric quantity of all the batteries; s4, when the real-time residual electric quantity of the battery corresponding to at least one energy storage inverter is smaller than a first preset value, the energy storage inverters are controlled to stop discharging, and when a first preset condition is met, the diesel generator is controlled to be started; and S5, when the real-time residual electric quantities of all the energy storage inverters are greater than a second preset value and meet a second preset condition, controlling the diesel generator to be turned off and controlling all the energy storage inverters to be turned on. Start and stop of the diesel generator are reasonably controlled, and the diesel generator and the battery are effectively utilized.

The invention discloses a balance control method for a multi-branch battery pack, the battery pack comprises at least two branches, each branch comprises at least two battery sub-packs which are connected in series, and each battery sub-pack comprises at least one battery cell; the equalization control method comprises the following steps: sorting each battery sub-pack according to the magnitude of the minimum voltage of each battery sub-pack; for each branch, selecting at least two adjacent battery sub-packs in the sorting sequence to form a branch; different branches comprise different battery sub-packs; and when determining that the battery pack has at least one to-be-balanced branch, controlling each to-be-balanced branch to start a passive balancing strategy. The to-be-balanced branch is a branch in which the residual electric quantity of at least one battery cell is greater than the target residual electric quantity corresponding to the branch. The sequence of the battery sub-packs is flexibly adjusted according to the magnitude of the minimum voltage of the battery sub-packs, the minimum voltage difference in each branch is ensured, the balance requirement in each branch is reduced, and the consistency and the balance efficiency of the whole pack are better improved.

The invention relates to the technical field of charging pile power distribution, in particular to a new energy charging pile power distribution method and system for multiple charging guns, and the method specifically comprises the steps: carrying out the priority weight distribution based on time, and enabling a first-arrival user to preferentially enjoy higher charging power according to a first-arrival first-service principle; an electric vehicle demand characterization factor is calculated according to the electric vehicle residual electric quantity, the electric vehicle with low electric quantity and urgently needing to be charged obtains certain electric energy, and the charging efficiency is improved; determining an expected time allocation weight of each charging pile based on the power change during charging; a suppression factor is introduced based on a total output power change trend prediction result to deal with total output power change in advance; comprehensively analyzing to adjust the distribution power of the charging pile in real time; the waiting time of the user is reduced through dynamic allocation, and efficient utilization of total output power, improvement of user experience and optimization of operation management of the charging station are realized.

The embodiment of the invention provides a power battery heating method and device and a vehicle-mounted terminal. The method comprises the steps that the battery temperature, the residual electric quantity and the driving mode are collected; determining a power battery heating strategy according to the battery temperature and a preset minimum heating temperature; then whether the battery temperature meets a heating condition corresponding to the power battery heating strategy or not is judged, and under the condition that the heating condition is met, a power battery heating mode matched with the battery temperature, the residual electric quantity and the driving mode is determined; heating the power battery according to the power battery heating mode; the corresponding power battery heating modes are adopted for heating the power battery according to different driving modes and environment states, battery heating and normal charging and discharging at the low temperature are met through strategy optimization, it is guaranteed that the battery can be normally heated at the low temperature in different scenes of the vehicle, heat pump and pulse heating at the low temperature is achieved, and energy consumption of the whole vehicle is reduced.

The invention discloses a control method of a PTC heater, a battery device, a vehicle and a storage medium, and the control method comprises the steps: controlling the heater to carry out gear switching to enter a preheating mode to heat the battery when the remaining electric quantity of the battery is lower than a first preset electric quantity and the current temperature of the battery is lower than a first preset temperature; when the battery enters the charging compensation mode, controlling the heater to carry out gear switching to cooperate with the battery to carry out charging compensation; when the remaining electric quantity of the battery is larger than or equal to second preset electric quantity, the heater is controlled to conduct gear switching to enter a maximum power mode to heat the battery, and the second preset electric quantity is larger than the first preset electric quantity. The heater can heat the battery when the battery is at the preset environment temperature such as low temperature, the performance of the battery and / or the heater is improved, the working mode of the heater is dynamically determined, and the working mode of the heater is dynamically switched, so that the heater heats the battery in the target working mode and / or cooperates with the battery for charging compensation.

The embodiment of the invention relates to a power supply delay circuit, a power supply delay control method, equipment and a storage medium. The circuit comprises a power supply battery module, a master controller, a first power supply module, a second power supply module and a delay selection module, the main controller is used for judging the current electric quantity of the power supply battery module, controlling the delay selection module to boost when the electric quantity is lower than the power supply electric quantity of the post-stage circuit, and controlling the second power supply module to supply power to the post-stage excitation source when the electric quantity is higher than the power supply electric quantity of the post-stage circuit; by detecting the residual electric quantity of the power supply battery module, when the residual electric quantity is lower than the set value, the delay selection module is started, the second power supply module is closed, and the delay selection module is used for boosting, so that the purpose of continuously supplying power to the post-stage excitation source is achieved, the power supply duration of the battery can be prolonged, and the technical effects of prolonging the service life of the battery can be achieved.

The invention relates to the technical field of data acquisition, and discloses a wireless communication acquisition method for a three-phase intelligent electric energy meter, and the method comprises the steps: enabling a user to find a household charging pile which is open to the outside through a charging platform, and selecting a charging pile which meets the charging condition of the user according to a charging pile screening strategy; the method comprises the steps that a user fills in vehicle information, calculates the remaining electric quantity and pre-estimates the remaining mileage, and determines the selection range of a charging pile; the charging duration is pre-estimated by acquiring the charging power of the charging pile and the charging demand of a user; further screening out the charging piles meeting the charging conditions of the user by considering the charging forbidding time interval of the charging piles and the working states of the charging piles; the charging pile recommendation is optimized by calculating the selection probability and the pushing strategy of the charging pile; in addition, according to the method, the output power of the charging pile is monitored in real time through the three-phase intelligent electric meter, whether charging continues or not is intelligently judged, and high efficiency of the charging process is ensured.

The invention provides a low-voltage battery management method and device, and belongs to the technical field of vehicles. The method comprises the following steps: determining a target preset electric quantity range based on the residual electric quantity of a low-voltage battery and a plurality of preset electric quantity ranges; based on a corresponding relation between a preset electric quantity range and a function control strategy of each low-voltage load device, determining a target function control strategy of each low-voltage load device corresponding to the target preset electric quantity range, the function control strategy of the low-voltage load device being used for indicating whether each function of the low-voltage load device can be started or not; the lower the preset electric quantity range is, the lower the power supply electric quantity required by the function capable of being started in the function control strategy of the low-voltage load equipment corresponding to the preset electric quantity range is; and based on the target function control strategy of each low-voltage load device, controlling functions in the target low-voltage load device in a starting state in the vehicle to be started or closed, and controlling a low-voltage battery to supply power to the target low-voltage load device. According to the invention, the power consumption of the whole vehicle is reduced.