831 results about "Reserve battery" patented technology

The present invention relates to a rail-suspended intelligent tunnel inspection robot, which mainly solves the technical problems, such as low speed, poor positioning accuracy, and relatively simple functionality, of existing inspection equipment. The intelligent inspection robot comprises a robot body, an inspection chamber, an auxiliary system, a data processing system and a robot management platform; the robot body comprises, for the robot body, a body structure, a control system, a positioning system, a power system and a communication system; the inspection chamber comprises, for the inspection chamber, a body structure, an inspection device and a standby battery; the auxiliary system comprises a rail, rail hangers, a wireless network system, an RFID positioning system and a wireless charging system; the data processing system comprises a front-end data processing system and a back-end data processing system; the robot management platform is used for carrying out remote digital management on data collected by the inspection robot and an analysis result.

The invention provides an unmanned aerial vehicle battery installation and management method and system for an intelligent charging cabinet, and relates to the technical field of unmanned aerial vehicles, comprising the steps that the intelligent charging cabinet selects a matched standby battery according to battery specification information, and battery replacement is completed through a visual positioning system and a mechanical arm; collecting performance parameters of the standby battery, generating a charging strategy and performing real-time adjustment; evaluating the performance of the standby battery based on a deep learning algorithm to generate a health evaluation report; and when the evaluation result is lower than a safety threshold, triggering recovery processing, and uploading the historical performance parameters to the cloud management platform to update the battery state evaluation model.

A battery control component of an electric vehicle may limit charging of a battery on the electric vehicle to a target state of charge (SOC), such as to reserve battery capacity for regenerative braking during downgrades. A computing device associated with the vehicle may calculate an estimated gradient profile and / or an estimated total energy consumption of a predicted upcoming route of the vehicle based on one or more data items, such as GPS data, altitude data, and / or map data. The computing device may determine a target SOC based on the estimated gradient profile. The computing device may determine a confidence factor associated with the estimated gradient profile, where the confidence factor depends on the quantity of data items used to calculate the estimated gradient profile. The computing device may adjust the target SOC based on the confidence factor.

The invention provides a communication master control system based on intelligent power supply, and relates to the technical field of communication, and the system comprises a power supply monitoring module which is used for monitoring the commercial power supply state of a communication base station, and automatically controlling a power switching circuit to switch a power supply mode to a standby battery power supply mode when the commercial power interruption is detected; the state acquisition module is used for acquiring the charge state, the discharge efficiency and the health state data of the standby battery in real time in a standby battery power supply mode, and acquiring the residual capacity, the actual discharge capacity and the life index of the battery; and the load receiving module is used for uploading the residual capacity, the actual discharge capacity and the life index of the battery to the communication main control unit, and receiving load data in the current communication network at the same time. According to the invention, intelligent scheduling of power utilization is realized, and the power supply reliability and stability of the communication system are 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.

A system configured to monitor a primary battery and a backup battery in a vehicle. The system includes one or more active components, such as a controller, that switch power between the primary battery and the backup battery. The system is configured to switch power from the primary battery to the backup battery when the power level of the primary battery drops below a threshold level. The system is generally implemented on a vehicle having an internal combustion engine. Power from the primary battery is used to start the engine. The backup battery is typically a swappable and interchangeable battery, such as a cordless power tool battery. In one example, the vehicle does not include an alternator.

The invention discloses a distribution network terminal standby battery protection method and system based on a time relay, and the method comprises the steps: starting the time relay, controlling the power supply of a standby battery, and guaranteeing a terminal to complete the operation according to a preset time parameter when the power loss of a distribution network line is detected; health parameters of the standby battery are monitored in real time and preprocessed, and real-time state data of the battery are calculated; according to the real-time state data of the battery, optimizing the charging and discharging strategy of the standby battery, and adjusting the charging and discharging process; and after power supply is recovered, the standby battery is automatically switched to the intelligent charging mode. The time relay is started to control the standby battery to supply power when the distribution network line loses power, power supply is cut off according to the preset time parameter, and unnecessary battery loss is effectively avoided. Meanwhile, the real-time health monitoring and data preprocessing technology is introduced, the real-time state data of the battery can be accurately calculated, the charging and discharging strategy is dynamically optimized according to the state of the battery, and it is ensured that the charging and discharging process is safe and efficient.

The invention provides an energy storage converter and an energy storage device, and belongs to the technical field of energy storage. The converter adopts a hybrid multi-level topological structure and is formed by connecting a three-level neutral point clamping circuit and a modular multi-level sub-module in parallel, and further comprises a hierarchical coordination control strategy, an upper decision-making layer calculates the priority weight of a charging and discharging mode, and a lower execution layer adopts model prediction control to generate a switch sequence. The heat dissipation system is accurately regulated and controlled based on an IGBT junction temperature prediction model, and cooperates with a battery management system (BMS) for protection, so that rapid data interaction and rapid emergency response are realized. The energy storage device comprises the converter and a battery pack, the battery pack is divided into at least two independent clusters, and the SOC of the standby battery cluster is maintained within the range of + / -5% of the main battery cluster. Through an innovative topological structure, an intelligent control strategy and an efficient heat dissipation system, the problems of wide voltage input adaptation, dynamic performance optimization, heat dissipation management and the like are solved, the efficiency and reliability of an energy storage system are improved, and the service life of the energy storage system is prolonged.

The invention discloses a data center uninterruptible power supply intelligent control method and device based on reinforcement learning, and relates to the technical field of energy management. The method comprises the steps that a health perception state space is constructed, and the state space comprises operation state features and standby battery multi-dimensional health vectors generated through training on a plurality of distributed uninterruptible power supply stations through a federated learning method; defining a multi-target reward function for comprehensively quantifying the economic cost based on the time-of-use electricity price, the standby duration satisfaction degree of the service level agreement and the battery life loss cost; through a reinforcement learning algorithm with a security constraint layer, based on the state space and the reward function, training an intelligent agent to learn an optimal power supply control strategy, the security constraint layer forcibly executing a preset operation security boundary in training and execution; and according to the learned optimal strategy, a real-time control instruction for the uninterruptible power supply is generated and executed.

The invention relates to a tethered airship self-destruction control method which specifically comprises an airborne control core and a self-destruction standby system so as to ensure that a self-destruction task can be effectively executed under different fault conditions. The airborne control core judges whether the airship exceeds a safety range or not through the GPS module, or receives a remote self-destruction instruction through the wireless communication module to trigger a self-destruction program. The self-destruction process comprises the steps that the valve push rod driving circuit rapidly deflates, the electric heating wire driving circuit burns through the ball body, the lithium battery burning explosion trigger circuit triggers battery burning explosion, and thorough damage is ensured. If the main system fails, the standby control module supplies power through a standby battery, takes over a self-destruction task, keeps communication with the ground, and triggers the parachute to release by utilizing a time delay mechanism or an air pressure sensor when the height sensor fails, so that the landing safety is guaranteed. And the main control program performs byte-by-byte deletion through a bootloader program in a self-destruction process, so that data leakage is prevented.

A hot-swappable battery system for computer peripherals includes a wireless mouse having a battery compartment, a battery connector assembly mounted within the battery compartment, a removable battery configured to be inserted into and ejected from the battery connector assembly, a keep-alive battery mounted within the wireless mouse, and a docking station. The battery connector assembly includes electrical contacts and a push-push ejector mechanism. The keep-alive battery is electrically connected to provide backup power when the removable battery is removed. The docking station has a battery slot configured to receive and charge the removable battery when not in use in the wireless mouse. The system enables continuous operation of the wireless mouse while battery swapping between the mouse and docking station.

The invention is suitable for the field of energy management, and discloses a double-battery power supply switching method, terminal equipment and a storage medium. The double-battery power supply switching method comprises the following steps: detecting a first electric quantity of a first main battery; if the first electric quantity is lower than the preset electric quantity threshold value, power is supplied through the standby battery; and if it is detected that the first main battery is replaced by the second main battery, supplying power through the second main battery, and stopping using the standby battery to supply power. Through the double-battery power supply switching method, when the electric quantity of the first main battery is lower than the preset electric quantity threshold value, the standby battery is automatically switched to supply power. According to the mechanism, the camera flashlight can be seamlessly switched to the standby power supply when the electric quantity of the main battery is insufficient, so that equipment shutdown caused by exhaustion of the electric quantity of the battery is effectively avoided, and the working continuity of the camera flashlight is improved.

The invention discloses a standby power supply automatic switching circuit, an MCU chip and a device, and the circuit comprises a PMOS turn-off voltage selection module, a level shift module, a PMOS switch gating module and an LDO module, the circuit is automatically switched to a standby battery for power supply when an external power supply is powered down, and the circuit is switched back to the external power supply for power supply when the external power supply is recovered. Therefore, the dynamic switching of the standby battery and the external power supply is realized. Besides, on the basis of flexibly switching the power supply mode, the voltage drop characteristic of the input voltage is optimized through a PMOS switch gating module, so that the circuit can still work normally within the wide voltage range of 1.8-3.6 V. Based on a PMOS turn-off voltage selection module, a voltage capable of turning off a PMOS (switch) is selected from an external power supply voltage and a standby battery voltage as a grid voltage, so that an electric leakage phenomenon when the PMOS is turned off is avoided, and the circuit stability is ensured. And extra quiescent current generated when the battery is not gated is avoided, the total current consumption of the battery at normal temperature is ensured to be lower than 5 microamperes, and the power consumption is greatly reduced.

The invention relates to the technical field of main and standby battery switching devices, and discloses a communication base station main and standby battery switching device which comprises a main battery, a standby battery and a zero-delay arc-free switcher connected with the main battery and the standby battery in parallel. Wherein the zero-delay arc-free switcher is internally provided with a mechanical action device for switching an input power supply channel so as to select to use the main battery or the standby battery to supply power, and the zero-delay arc-free switcher is also provided with a group of output electrodes; and a capacitor connecting part for switching is fixedly arranged in the zero-delay arc-free switcher. According to the invention, the capacitor connection part for switching is used as an uninterruptible power supply unit in the switching action process of the mechanical device, so that the power supply within the shortest three seconds can be provided, the stable switching connection of the mechanical device is ensured, and the low-delay power supply requirement can be effectively met.

A portable electronic device includes a battery reserve feature for emergency use, reserving a portion of battery power when a predefined threshold is reached. A battery detector monitors the real-time battery level, sending data to a host controller that compares it to the threshold stored in non-transitory memory. Upon reaching the threshold, a masking module signals a depleted battery state to the operating system, disabling regular functions while a display shows a “no power” message, concealing the reserve. User interaction, such as pressing a designated button, activates an emergency subsystem to perform operations like initiating emergency calls, sending GPS coordinates, capturing screenshots, or activating alarms, using the reserved power. The threshold may be dynamically adjusted based on environmental or location-based factors.

The invention provides a charging activation device, an energy storage system and an activation method thereof, and belongs to the technical field of energy storage systems. The charging activation device comprises a standby battery pack, a boost inverter circuit, a voltage acquisition circuit and a microcontroller unit. Wherein the standby battery pack is used for providing a power supply for the boost inverter circuit and the microcontroller unit; the boost inverter circuit is used for boosting the input voltage to an activation voltage threshold of a battery management system of the energy storage system; the voltage acquisition circuit is used for acquiring the output voltage of an energy storage battery of the energy storage system; when the microcontroller unit detects that the energy storage system is in a locked state, the microcontroller unit can control to open the boost inverter circuit so as to boost an input voltage of the boost inverter circuit to an activation voltage threshold of a battery management system of the energy storage system and output the input voltage, so that the battery management system recovers a charging and discharging loop, and the energy storage system is activated. Automatic wakeup of the energy storage battery in the dormant state can be achieved, manual intervention is not needed, and dependence on manpower or external equipment is eliminated.

The invention discloses a low-power-consumption sleep control method and system for a vehicle-mounted TBOX, and the method comprises the steps: carrying out the polling of an ACC state, uploading a vehicle state according to the voltage of a storage battery and the voltage of a standby battery, configuring the timing wake-up time of an external RTC, and controlling the sleep mode of the TBOX and the power consumption state of an MCU when the ACC state is detected to be changed from an ignition state ON to a flameout state OFF; and after the timing wake-up time of the external RTC, TBOX wake-up control is carried out, and the timing wake-up time of the external RTC is configured and the sleep mode of the TBOX and the power consumption state of the MCU are controlled again according to the ACC state, the storage battery voltage, the standby battery voltage, the uploaded vehicle state and the timing wake-up time of the external RTC. Different sleep modes can be switched according to the voltage state of the storage battery, and synchronous guarantee of the remote control requirement of a user and the voltage protection of the storage battery is achieved.

The invention relates to the technical field of blind guiding sticks, in particular to an intelligent blind guiding stick based on an ultrasonic sensor, which comprises a stick body, an anti-slip handle and an anti-slip mat, the upper end of the stick body is fixedly connected with the anti-slip handle, and the outer side of the lower end of the stick body is sleeved with the detachable anti-slip mat; the crutch further comprises a vibration feedback device and an ultrasonic sensor, the vibration feedback device is arranged in the anti-skid handle, a solar cell panel and light-emitting strips which are symmetrically distributed up and down are installed in a concave position of the outer side of the crutch body, and a standby rechargeable battery, a GPS positioning module and a voice prompt module are sequentially installed on the outer surface of the crutch body from top to bottom. The upper end of the stick body is fixedly connected with an ultrasonic sensor; the intelligent blind guiding stick accurately measures the distance and the position of a front obstacle, an effective vibration feedback and voice prompt mode enables a user to know surrounding environment information in time, more comprehensive travel help is provided for visually impaired people, the endurance requirement of the user is guaranteed through the solar technology and a standby battery, and the intelligent blind guiding stick is suitable for popularization and application. And the portable and long-distance requirements are met.

A flying elevator is characterized by comprising (100) a ducted propeller arrangement. And (200) a flying elevator telescopic car body. And (300) supplying power to the transfer platform truck. And (400) an intelligent control system. And (500) final assembly of the structure. The mechanisms and the systems are combined through final assembly. Therefore, a set of economical and practical elevator type intelligent low-altitude aircraft is formed. The technical problem that a conventional low-altitude aircraft cannot be connected for a long time to continuously work and cannot be increased in capacity due to limitation of self-loading power or electric power is solved. The elevator is widely applied to high-rise buildings, high-altitude construction sites, disaster areas and scenic areas and serves as a temporary elevator or a short-distance aircraft. And the emergency operation and rescue work of personnel transfer and material transportation can be continuously carried out by a single machine for a long time. The flying elevator has the beneficial effects that 1, the flying elevator flies with lines, and electric power is continuously provided by using the mains supply or a vehicle-mounted power generation device, so that the flying elevator can continuously run for a long time; 2, off-line flight: driving the flight elevator to run by utilizing a reserve battery in an area which is not suitable for line-carried flight; and emergency operation and rescue work in different environments are facilitated. And 3, a multi-set mechanical structure design, a power supply device and a control system. And flight safety and operation convenience are guaranteed.

A method, system and apparatus are disclosed. A management node configured to communicate with a power grid operator and with a plurality of RBSs is provided. Each of the plurality of RBSs is configured to be switchable between power from a power grid and power from a respective plurality of backup battery units associated with the RBS. The management node is configured to: determine a primary subset of the plurality of RBSs to participate in at least one FCR event occurring over a predefined time interval, and determine a standby subset of the plurality of RBSs that are each configured to participate in the at least one FCR event in place of a failure of a respective one of the primary subset of the plurality of RBSs.

The invention relates to the technical field of intelligent fire fighting and fire prevention, in particular to an independent intelligent peripheral fire prevention system. The system comprises a fire monitoring and intelligent early warning system, an intelligent control center, a multi-layer three-dimensional protection system, a multi-water-source supply system and an independent power system. The monitoring and early warning system adopts a multi-mode sensor (temperature, smoke, infrared and visible light cameras, combustible gas detection and the like), and AI intelligent analysis is combined, so that automatic identification, early warning and response of fire behavior are realized. The intelligent control center is responsible for fire hazard grade evaluation and dynamic adjustment of the protection system. The multi-layer three-dimensional protection system comprises a high-pressure water curtain, an intelligent fire water monitor, an automatic spraying device and the like and is used for blocking an external fire source and accurately extinguishing fire. The multi-water-source supply system supports real-time recovery of municipal water sources, underground water storage ponds, rainwater collection systems, swimming pool water and fire fighting water, and has an intelligent switching function. The independent power system supports a municipal power grid, solar energy, a diesel generator and a standby battery pack so as to ensure that the system can still operate continuously under the condition that municipal power supply fails. The system can provide multiple fire protection guarantees of active detection, intelligent early warning, automatic protection and remote manual intervention, is especially suitable for high-fire risk scenes such as building periphery fire protection, forest fire prevention, high-risk material storage and open-air material stacking areas, and improves the independence, safety and reliability of a fire protection system.

The invention discloses an unmanned aerial vehicle for rice planting and a supply platform of the unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles and supply platforms, the unmanned aerial vehicle for rice planting and the supply platform are included, the supply platform comprises a moving trolley, an operation platform, a supply box, a limiting assembly and a replacement assembly, and the limiting assembly is located in the operation platform; the limiting assembly comprises a shell, a bidirectional adjusting assembly and a limiting plate, wherein the bidirectional adjusting assembly and the limiting plate are located in the shell. The unmanned aerial vehicle body is clamped through the limiting assembly. The replacing assembly comprises a synchronous belt assembly, a supporting plate, a pesticide box limiting groove and a battery limiting groove, wherein the pesticide box limiting groove and the battery limiting groove are located in the supporting plate. The unmanned aerial vehicle body replaces a pesticide box and a battery body through the replacing assembly. And a medicine filling barrel, a charging assembly and a standby battery are arranged in the supply box. The medicine box and the battery body can be conveniently replaced through the replacement assembly, and the labor intensity is relieved; and meanwhile, the unmanned aerial vehicle can be parked and transferred along with the vehicle conveniently, and rapid replenishment and flexible arrangement are achieved.

The invention discloses an independent wind and light storage combined control system, which comprises a core control module, a wind power generation module, a photovoltaic power generation module, an energy storage module, an ADC (Analog to Digital Converter) acquisition module and a display module, the wind power generation module and the photovoltaic power generation module respectively adopt a wind power generator and a photovoltaic panel to convert wind and light resources into electric energy to be supplied to the energy storage module, so that the endurance of the device is realized; the energy storage module comprises a storage battery and a standby battery, the storage battery supplies power to the main control module and the load, two voltage thresholds are set for the storage battery, and when wind and light resources are too few and the electric quantity of the storage battery is within the set voltage threshold interval, the system can be automatically switched to the standby battery for endurance of the device and the load. The system is reasonable in design, stable in work, good in performance, fast in data detection, simple in calculation, stable in output and capable of being controlled in real time, the output of each power supply can be adjusted according to weather conditions and the state of the storage battery, and a standby power supply can be switched to be used by a load.

The invention discloses an electric ship standby battery control strategy based on improved droop control. The electric ship standby battery control strategy comprises the following steps: step 1, constructing a cooperative work model of an electric ship standby battery and a main battery; 2, improving a traditional droop control strategy through a translation droop curve, and achieving power equalization; step 3, based on the improved droop control strategy in the step 2, compensating voltage offset by using a fuzzy algorithm to improve the voltage control precision; and 4, accurately distributing the output current of each direct current bidirectional converter through output current information interaction between the main battery direct current bidirectional converter and the standby battery direct current bidirectional converter. According to the electric ship standby battery control strategy based on improved droop control, the output power of the standby battery can be rapidly and accurately adjusted according to the real-time operation state of the electric ship, and the electric ship standby battery control strategy has the practical application value for maintaining the voltage and frequency stability of a ship electric power system and improving the comprehensive utilization efficiency of energy.

The utility model discloses a battery pack for outdoor operation equipment, and the battery pack for the outdoor operation equipment comprises a power output assembly which is set to output power so as to execute outdoor operation; the walking assembly is arranged to support the outdoor operation equipment to walk; the battery pack is characterized in that the battery pack comprises a shell which is detachably installed on outdoor operation equipment; the battery cells are arranged in the shell, the diameter of the battery is greater than or equal to 40mm, and the length of the battery cells is greater than or equal to 13.5 mm; wherein the ratio of the length of the battery cell to the width of the shell is greater than or equal to 0.7. According to the battery pack for the outdoor operation equipment, the ratio of the length of the battery cells to the width of the shell is set to be greater than or equal to 0.7, so that the space of the shell is utilized more sufficiently, and the battery cells are arranged more compactly, so that a larger space of the outdoor operation equipment cannot be occupied under the condition that a plurality of battery packs are placed on the outdoor operation equipment.

A battery transportation equipment to transport a plurality of backup batteries. The battery transportation equipment includes: rollers, an equipment body, a battery cavity and a cooling device. The rollers are connected to the equipment body; the battery cavity is formed by an inward recess of the equipment body; the battery cavity is used to accommodate the plurality of backup batteries and is provided with a pairs of outwardly extending power plugs. The power plugs are used to plug-connect with the power jacks of the backup battery. The cooling device surrounds the battery cavity to dissipate heat when the plurality of backup batteries are being charged.

The utility model discloses a battery pack for outdoor operation equipment, and the battery pack for the outdoor operation equipment comprises a power output assembly which is set to output power so as to execute outdoor operation; the walking assembly is arranged to support the outdoor operation equipment to walk; the battery pack is characterized in that the battery pack comprises a shell which is detachably installed on outdoor operation equipment; the battery cells are arranged in the shell, the diameter of the battery is greater than or equal to 40mm, and the length of the battery cells is greater than or equal to 13.5 mm; wherein the ratio of the length of the battery cell to the width of the shell is greater than or equal to 0.7. According to the battery pack for the outdoor operation equipment, the ratio of the length of the battery cells to the width of the shell is set to be greater than or equal to 0.7, so that the space of the shell is utilized more sufficiently, and the battery cells are arranged more compactly, so that a larger space of the outdoor operation equipment cannot be occupied under the condition that a plurality of battery packs are placed on the outdoor operation equipment.

A power supply control circuit that allows the power to be supplied from a power supply such as a sub-battery to a load for a longer period of time, in the event of a failure of a main power supply. The power supply control circuit (1) includes: a first circuit (2) connecting a main battery (52) and a sub-battery (53) via a DC / DC converter (20); a second circuit (3) connecting a main battery (52) and a load (54); and a third circuit (4) connecting the sub-battery (53) and a load (54) via a semiconductor switch (32). When the main battery (52) fails, the semiconductor switch (32) is turned ON to supply the power from the sub-battery (53) to the load (54), and the forward direction of a parasitic diode (32a) of the semiconductor switch (32) is a direction from the load (54) to the sub-battery (53). Furthermore, the DC / DC converter (20) boosts the voltage from the main battery (52) and supplies the boosted voltage to the sub-battery (53).

To provide a mobile battery exchange system and program that increase the number of mobile units in operation and their operating hours and reduce waiting areas for the mobile units without increasing spare batteries, chargers, and battery exchange devices and personnel.SOLUTION: A mobile battery exchange system includes a plurality of mobile objects each having a battery and executing a predetermined task, a station having a spare battery, and a management server for instructing the mobile objects to execute the predetermined task, the predetermined task includes a battery exchange task for moving the mobile object to the station and exchanging the battery in the mobile object with the spare battery in the station. The management server transmits the battery exchange task to the mobile object on the basis of the time of the previous battery exchange and a predetermined battery exchange period Tt.SELECTED DRAWING: Figure 5

The present invention discloses a backup battery undervoltage management circuit and method, comprising: an MCU circuit, an OR gate circuit, a battery voltage detection circuit, a resistor voltage divider circuit and a switch circuit; the MCU circuit sets a high or low level for a first output terminal and a second output terminal according to the working state of a vehicle-mounted terminal and / or the detected backup battery power; the OR gate circuit is used to determine whether a high level is output; the battery voltage detection circuit is respectively connected to the backup battery, the MCU circuit, and the OR gate circuit to detect whether the backup battery is undervoltage; the resistor voltage divider circuit is arranged between the backup battery and the MCU circuit, and when the vehicle-mounted terminal is not in a dormant state, the MCU circuit detects the output of the resistor voltage divider circuit; the switch circuit is arranged between the OR gate circuit and the backup battery, and controls whether to power the MCU through the OR gate circuit. The present invention can accurately and timely detect whether the backup battery is undervoltage, and perform corresponding actions to turn off or on the backup battery.