32results about How to "Realize seamless switching" patented technology

The application relates to a double-nail-head carton nailing machine transmission mechanism capable of quickly switching between synchronous and separation modes, and relates to the technical field of carton nailing equipment. The double-nail-head carton nailing machine transmission mechanism comprises a carton nailing machine, an upper nail head mechanism and a lower nail head mechanism arranged on the carton nailing machine, and the upper nail head mechanism and the lower nail head mechanism are both connected with a transmission mechanism. The transmission mechanism comprises an upper nail head eccentric wheel, the upper nail head eccentric wheel is coaxially fixedly connected with an input shaft of the upper nail head mechanism, and the transmission mechanism comprises a lower nail head eccentric wheel, the lower nail head eccentric wheel is coaxially fixedly connected with an input shaft of the lower nail head mechanism. The application has the effects of simple structure, low cost and quick mode switching.

This invention discloses a boost DC bus voltage matching system for a motor inverter with dual high-voltage battery packs, comprising a battery management system, battery pack A, battery pack B, main negative contactor R2, main positive contactor R3, main negative contactor R4, a first voltage sensor, a first current sensor, a second voltage sensor, a second current sensor, a third voltage sensor, a vehicle control unit, a generator control module, an inverter, a generator, a relay Rb, current sensors a1, b1, and c1, a DC link capacitor bank CDC, a power inverter module, a motor controller, current sensors a2, b2, and c2, and a traction motor. The invention features a highly integrated hardware architecture, effectively reducing system cost and space occupation, enabling seamless battery pack switching during driving, effectively suppressing surge current, protecting high-voltage components and ensuring power stability, improving system fault tolerance, and enhancing the operational reliability of the high-voltage system.

This utility model relates to the field of waste removal technology for printing machines, specifically to a waste removal device for a label printing machine, including a mounting frame, a winding mechanism, and an auxiliary mechanism. The winding mechanism includes a rotating plate rotatably mounted on the mounting frame and two winding rollers rotatably mounted on the rotating plate. The auxiliary mechanism includes a sliding block, a tension spring, a cutter box, a sponge pressing block, a cutter plate, a sliding assembly, and a limiting assembly. The sliding assembly includes a guide groove, a second guide rod, a second spring, a counterweight rod, and a guide slide rod. When the front winding sleeve is full, the rotating plate rotates to switch the rear empty sleeve to the front working position and, in conjunction with the auxiliary mechanism, cuts the waste material without stopping the machine to change the roll. Before cutting the label waste, the sponge pressing block presses the waste material, causing the corner waste material to adhere to the winding sleeve, preventing the waste material from shifting during cutting and ensuring a flat cut. Under the guidance of the guide slide rod and the guide groove, the counterweight rod drives the cutter to slide and cut the corner waste material under the action of inertia, improving the cutting efficiency.

The invention relates to a metering data transmission method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring load information of a first communication link under the condition that a plant station side and a main station side in a power grid perform metering data transmission through the first communication link and a second communication link; under the condition that the load information of the first communication link meets a pre-switching triggering condition, switching target flow in the first communication link to a second communication link so as to transmit metering data through the first communication link and the second communication link; acquiring heartbeat information returned by the first communication link; and under the condition that the heartbeat information meets the fault switching condition, switching the residual flow except the target flow in the first communication link to the second communication link so as to transmit the metering data through the second communication link, thereby ensuring that the metering data is not lost and the service is not interrupted, and effectively improving the reliability of power grid metering data transmission.

This utility model discloses a robotic gripper for handling plastic pipe fittings, including a drive box, clamping rods, and clamping bars. The drive box has a base on its bottom surface, and the clamping rods are rotatably mounted on the base surface. A hydraulic cylinder is mounted on the base, and the output end of the hydraulic cylinder is connected to a connecting plate. The connecting plate is rotatably connected to the top of the clamping rods via a connecting rod to achieve synchronous deflection and opening / closing of multiple clamping rods. The bottom end of the clamping rod has a chuck seat, and the bottom and side surfaces of the chuck seat have two mutually perpendicular locking surfaces. The clamping bars are rotatably connected to the chuck seat via a ring lug and an elastic element on the top surface. Under the action of the elastic element, the clamping bars elastically abut against the locking surfaces. The clamping bars have a cavity and an adsorption hole and an air tube head for connecting an air source to form negative pressure adsorption. This tooling can automatically switch between clamping and adsorption modes by deflecting the clamping rods to different locking surfaces. It has a compact structure, strong adaptability, and is suitable for the flexible clamping and handling of various specifications and easily deformable plastic pipe fittings.

The present application relates to a multifunctional multi-suspension-point gantry crane, through the design of four winch mechanisms symmetrically arranged on the left and right sides and a movable trolley, flexible configuration and dynamic adjustment of the suspension points are realized, the needs of complex hoisting tasks are adapted, and the operation efficiency and precision are significantly improved; the second guide pulley is detachably connected with the rectangular frame through the first locking device, and cooperates with the second locking device of the movable trolley, so that the second guide pulley can be quickly locked on the movable trolley after being unlocked, seamless switching of the position of the second guide pulley is realized, the equipment function is expanded, and manual intervention is reduced; the second locking device completes the fixing of the second guide pulley at the same time when the first locking device is unlocked, the operation process is simplified, the risk of misoperation is reduced, and the safety and stability of the hoisting process are ensured; the linkage design of the movable trolley and the second guide pulley avoids the redundant space occupation caused by the fixed structure of the traditional gantry crane, and is especially suitable for hoisting operations in narrow or complex sites.

The invention discloses a collaborative password method and system based on certificateless SM2, and belongs to the technical field of information security. In order to solve the security risk problem of terminal key security management and use in the existing certificateless SM2 system and the problem of SM2 certificate system management complexity, a key is generated through three-party cooperation of a certificateless SM2 key generation center, a client and a cooperation server, and the key generation center only provides part of private keys. And the client and the collaboration server each generate a partial private key, the complete private key never appearing in any single entity. During signature and decryption, the two parties respectively hold private key shares to cooperatively complete, and the private key cannot be leaked when any party is broken through. And decryption adopts a blind technology to protect privacy. In addition, the user can freely select whether the cooperation mode is started or not, public keys in the two modes are consistent, and a verifier does not need to distinguish. The method is suitable for scenes such as cloud computing, mobile payment and Internet of Things.

The invention discloses a power switching control circuit and method, an energy storage system and an inverter, and relates to the technical field of power electronics, the power switching control circuit comprises an inversion module, a power grid switch switching unit, an inversion switch switching unit and a control module, and the inversion switch switching unit comprises an inversion relay unit and an inversion thyristor unit which are arranged in parallel; the control module is connected with the inversion module, the power grid switch switching unit and the inversion switch switching unit, the power grid switch switching unit is connected with the inversion switch switching unit, and the inversion switch switching unit is connected with the inversion module; the control module is used for driving the inversion thyristor unit to be switched on and controlling the inversion relay unit to be switched off under the condition that the inversion thyristor unit is switched on; and the control module is also used for driving the power grid switch switching unit to be conducted after stopping driving the inverter thyristor unit to be conducted. According to the invention, the technical problem of poor stability of grid-connected and off-grid switching is solved.

The invention relates to a database technology, in particular to a password updating method, a product, a medium and equipment. The method comprises the steps that a first agent node responds to a password updating request of a target user and sends a pre-updating notification to a second agent node through a remote warehouse; the second agent node exchanges the new password of the target user with the first agent node based on the authentication information of the target user as a standby password; after it is confirmed that all the second agent nodes are exchanged, the first agent node executes password updating operation; and when the second agent node is connected with the storage node, replacing the password of the target user by adopting a preset password trial and error mechanism. According to the password updating method, the password is updated after secure exchange, seamless replacement of the password is realized through a trial and error mechanism, smooth switching of actual password states of each agent node and the storage node in the password updating process is realized, service unavailability caused by password failure is avoided, and the password updating efficiency is improved. And the high availability of the distributed database cluster is ensured.

The embodiment of the invention provides a self-adaptive motion control method of a humanoid robot and related equipment, and belongs to the technical field of robots. The method comprises the following steps: acquiring multi-modal input data, wherein the multi-modal input data comprises state data of the humanoid robot and surrounding environment data; performing feature extraction on the multi-modal input data to obtain multi-modal fusion features; performing feature recognition on the multi-modal fusion features to obtain a recognition result representing motion interaction logic of the humanoid robot and the environment; and performing adaptive adjustment on the degree-of-freedom coefficients of different joints according to an identification result, and generating a robot motion control instruction. According to the embodiment of the invention, the adaptability of the humanoid robot to different scenes and the motion control precision of the robot can be improved.

The invention discloses a mountain water system distribution visualization analysis method, and relates to the technical field of geographic information systems.The mountain water system distribution visualization analysis method comprises the steps that multi-source geological and hydrological data of a target area is obtained; based on the multi-source geological and hydrological data, generating at least one thematic visualization layer, the thematic visualization layer being used for expressing spatial distribution characteristics of geological or hydrological attributes of the target area; and fusing the at least one thematic visualization layer to generate a mountain water system comprehensive visualization view. According to the method, multi-source geological hydrological data of a target area is acquired, a plurality of thematic visual layers including a water system distribution visual layer, a geological risk marking layer, a climate distribution layer and the like are generated based on the data, and then the layers are superposed and fused with a three-dimensional terrain base model; the mountain water system comprehensive visual view is formed, and the problem that in a traditional method, all thematic layers are independently displayed, and effective fusion is lacked is solved.

The application discloses an adaptive foot pressing device for a robot end effector and the end effector. The end effector comprises a base unit, and the device comprises a receiver, a foot pressing unit, an elastic reset assembly and a non-contact distance measuring assembly. The foot pressing unit is movably connected with the receiver and can adaptively deflect to fit a workpiece when pressed; the distance measuring assembly detects the distance between the base and the workpiece, and feeds back to guide the robot to adjust the posture to realize normal alignment. The end effector is also provided with a switching unit which integrates drilling, hole diameter and hole depth measurement and hole detection hole units, and through movement, the units can successively share a second channel to work. The application solves the problems of difficult normal alignment and rigid collision of complex curved surfaces, realizes the full-process automation and closed-loop control of normal alignment, hole making, dust collection and detection, and significantly improves the machining precision and efficiency.

The present application relates to a kind of double-channel low-voltage ideal diode, including two independent and same structure channel, the power PMOS tube of each channel is integrated, gate drive circuit, current sampling circuit, programmable current limiting circuit, temperature detection circuit and undervoltage lockout circuit.The present application is adjusted by gate drive circuit intelligent degree of power tube conduction, maintain about 15mV ultra-low conduction voltage drop when light load, more than 90% lower than traditional schottky diode power consumption;Through CLIMx external resistance, current limiting value can be flexibly set;With two-stage temperature protection (130 ℃ early warning / 160 ℃ shutdown) and fast reverse current blocking function, seamless switching of main backup power supply can be realized.The present application effectively solves the problems of high power consumption, serious heating, lack of programmable protection and reverse current risk of existing diode scheme, and is especially suitable for unmanned aerial vehicle, aerospace and industrial control in the key load power supply with strict requirements on volume, power consumption and reliability.

The invention provides a multi-level power converter fault tolerance method, which comprises the following steps of: acquiring an output voltage, an inverter side current and a direct current side voltage, performing conversion, and performing PI modulation to obtain a modulation wave of a system; judging whether the system has a fault or not, and judging a specific fault-tolerant scheme according to the modulation degree of the modulation wave if the system has the fault; based on a fault-tolerant scheme, selecting an output state of a redundant vector of a non-fault phase; and based on the selected output state, generating a corresponding driving signal through carrier phase-shifting PWM (Pulse-Width Modulation). The multi-level hybrid topology can keep the same working state before and after the fault, the floating capacitor voltage and the direct current side capacitor voltage are stable, the fault response is rapid, the large-range fluctuation of the output voltage and the output current is avoided, the smooth switching of the working modes is ensured, and the fault tolerance of the system is improved.

The utility model provides a classified placement structure of a healing abutment and a disinfection classification box with the same, the classified placement structure is matched with an outer shell, the outer shell is of a hollow structure, the top of the outer shell is provided with an upper opening, and the front part of the outer shell is provided with a plurality of front openings; the classified placement structure comprises a disinfection frame which can be installed in the hollow part of the outer shell through the upper opening; and the classified placement drawer is used for placing healing abutment with different sizes and is slidably mounted on the disinfection frame, and when the disinfection frame is mounted on the outer shell, the classified placement drawer can extend out of the outer side of the outer shell from the front opening.

The invention discloses a spliced screen control system and method, a display device and a computer readable storage medium. According to the embodiment of the invention, the spliced screen control system comprises a plurality of display screen control modules, and each display screen control module comprises a video input interface used for inputting a video signal; the video copying unit is used for receiving the video signals and copying the video signals to obtain multiple paths of output video signals; the video processing unit receives one path of output video signal; the video processing unit is used for processing the received output video signal so as to drive a corresponding display screen; and the at least one video output interface is used for receiving one path of output video signal and sending the received output video signal to the other display screen control module. According to the spliced screen control system and method, the display device and the computer readable storage medium, wiring of the spliced screen can be simplified.

This invention relates to a periodic-trend decoupled predictive control method and system for large-scale industrial models, belonging to the field of machine tool digital control technology. The method includes constructing a multi-source heterogeneous data stream; generating a periodic feature tensor and a trend residual sequence; processing the periodic feature tensor through a depthwise separable convolutional network to extract the tool wear coefficient and spindle thermal drift coefficient, generating a machining surface quality index and a tool remaining life prediction range; solving a finite-time domain optimization problem with feed rate limiting and spindle torque constraints, generating the feed axis speed loop feedforward compensation and spindle speed correction; and finally outputting the result to the cyclic synchronous position mode control word of the servo driver through a safe shutdown path. This invention achieves periodic-trend dual-scale decoupling through angle domain resampling and adaptive variational mode decomposition, enabling safe and reliable execution of predictive control commands for spindle load in a five-axis machining center.

The invention provides a switching control method and device of an inverter, electronic equipment and a readable storage medium, and the method comprises the steps: inputting power quality data monitored in real time into a pre-constructed power grid fault pre-judgment model during the grid-connected operation of the inverter, and obtaining a real-time fault level of a power grid; when the real-time fault level is a pre-alarm level, voltage outer loop control is started, collaborative initialization is carried out on a voltage outer loop and a current inner loop, and an inverter is switched from a current source control mode to a voltage source following mode; performing closed-loop regulation on the output power of the inverter based on the voltage outer loop instruction increment corresponding to the real-time fault level so as to realize pre-balance between the output power and the local load power; and when the real-time fault level is converted from the pre-alarm level to the fault switching level, the connection between the inverter and the power grid is cut off, and the inverter is controlled to operate in an off-grid voltage source mode. In this way, cooperative initialization and power pre-balance of the inner loop and the outer loop are controlled in advance through graded early warning, and seamless switching from grid connection to grid disconnection is achieved.

The invention discloses a multi-material 3D printer, and relates to the technical field of 3D printing. The 3D printer comprises a printing head, a heating head, a guide assembly and a comprehensive driving assembly are sequentially installed in the printing head from bottom to top, and a plurality of wire conduction assemblies are annularly arranged in the guide assembly; a positioning conical groove and a blocking inclined groove are sequentially formed in the heating head from bottom to top. According to the device, the arrangement of a single heating head and multiple switching heads is adopted, the comprehensive driving assembly and the guide assembly are matched, the conical switching heads can be automatically switched from the heating heads, during switching, the cooling system enables the wires to be rapidly solidified in the conical switching heads, the conical switching heads move to the positions of the plugging chutes, the arc-shaped inclined openings are plugged, and rapid switching of the wires is completed; and the multiple wires are heated at the same time, new wires do not need to wait for heating time, seamless switching is achieved, the switching speed is high, and due to the fact that the wires are accumulated in the conical switching head all the time, wire waste can be reduced.

The invention discloses an Internet of Things gateway communication method and device, a gateway, a communication system and a storage medium. A main communication link and a standby communication link are arranged between the Internet of Things gateway and the digital base, the main communication link adopts a first communication protocol, the standby communication link adopts a second communication protocol, and the anti-interference capability of the second communication protocol is higher than that of the first communication protocol. The Internet of Things gateway comprises a first communication interface corresponding to a main communication link and a second communication interface corresponding to a standby communication link. The method comprises the following steps: acquiring at least one communication index of the Internet of Things gateway under the main communication link; if any communication index is greater than or equal to the corresponding threshold value, determining that the communication of the main communication link is abnormal; and switching the communication protocol and the communication interface of the Internet of Things gateway by loading and unloading the protocol stack so as to switch to the standby communication link to communicate with the digital base. According to the invention, signal interruption between the Internet of Things gateway and the digital base caused by an electromagnetic interference environment can be avoided, and communication continuity and stability are ensured.

This application relates to an intelligent simulation system and method. The intelligent simulation system includes at least: a simulation configuration specification generation system for generating a simulation configuration specification based on user-input simulation tasks; the simulation configuration specification describes simulation configuration information; a simulation task resource inference system for inferring the computational resources required to execute the simulation task based on the simulation configuration specification; a simulation orchestration system for determining a target solver from multiple solvers based on the simulation configuration specification, so that the target solver executes the simulation task based on the computational resources; and a simulation fault repair system for generating repair instructions and a diagnostic report when the target solver fails to simulate. Through multi-system collaborative coupling, the intelligent simulation system enables users to trigger the simulation workflow through natural language interaction, achieving end-to-end automation from mesh generation to solution analysis. This significantly reduces the user's familiarity with the underlying software operations and enables standardized delivery of simulation expert engineering capabilities.

The application discloses an intelligent switching method and system of an integrated card, the integrated card and a storage medium. The intelligent switching method of the integrated card comprises the following steps: when the integrated card is installed on a terminal device, and a carrier traffic master card obtains a card switching instruction of a user for the terminal device, the carrier traffic master card controls a corresponding carrier traffic master card or carrier traffic slave card to be in communication connection with the terminal device according to the card switching instruction; and when the integrated card is installed on the terminal device, the carrier traffic master card obtains a network connection state detected by the terminal device according to a preset automatic switching instruction, and controls the corresponding carrier traffic master card or carrier traffic slave card to be in communication connection with the terminal device according to the network connection state. Through the detection and judgment of the platform instruction switching and the automatic card switching condition, the seamless switching of the integrated card is realized, and the network switching efficiency is improved.

The invention relates to a constant-current-to-constant-voltage power supply and a control method, and the power supply comprises a current bypass circuit which comprises a bypass switch and is used for bypassing the power supply from a main loop when the power supply fails; the DC / DC converter is used for converting the direct-current bus voltage into required output voltage; the direct-current bus capacitor is used for storing energy and maintaining the bus voltage to be stable; the control center is used for detecting output load power and calculating a required direct current bus voltage reference value Uref; the input end of the DC / DC converter is directly connected with the output end of the current bypass circuit, and the DC bus capacitor is bridged between parallel connection points; the control center calculates Uref according to the output load power and the input constant current value, and controls the on-off state of the bypass switch through a hysteresis control strategy so as to maintain the DC bus voltage within the range of Uref + / -delta U; the power supply does not comprise an independent constant-current-to-constant-voltage module.

An automatic weighing roller for aluminum plate transportation, including conveying roller, conveying motor is arranged below conveying roller and is used for driving conveying roller, conveying roller includes transportation section and weighing section, connecting frame is arranged below weighing section, lifting drive assembly is installed on connecting frame, lifting drive assembly is fixedly connected with base plate, weighing scale is arranged on base plate, comb support plate is installed on top of weighing scale, protruding part of comb support plate is embedded in the gap of two rollers of conveying roller alternately, first photosensitive sensor and second photosensitive sensor are arranged side by side on the support plate below the end of weighing section, and the lateral spacing of first photosensitive sensor and second photosensitive sensor is less than the width of conveying aluminum plate. The utility model aims at avoiding the problems of low production efficiency, unstable product quality and high safety hidden trouble caused by offline weighing.

This invention discloses a seamless switching positioning method integrating RTK and PPP-RTK algorithms. This method achieves seamless switching between RTK and PPP-RTK algorithms by designing a dual-state model within a Kalman filtering framework. When network connectivity is available, the system automatically uses NRTK corrections to achieve high-precision RTK positioning; when the network is interrupted, the system seamlessly switches to satellite-based PPP-RTK corrections for PPP-RTK positioning without requiring a software restart. This invention, through the design of a state transition matrix and an adaptive noise adjustment mechanism, ensures positioning continuity and accuracy stability during the switching process, solving the problem of traditional methods requiring re-initialization during switching, which leads to positioning interruptions. This significantly improves the robustness and availability of GNSS positioning systems in complex environments.

This utility model relates to the field of portable lifting equipment technology, and in particular to a foldable small hoist suitable for various types of manhole covers. The small hoist includes a fixed base, a support rod, a boom, a first adjusting rod, a second adjusting rod, and a connecting plate. The support rod is vertically mounted on the fixed base. One end of the boom is connected to the upper end of the support rod, and the other end is equipped with a pulley system. A winch on the support rod is connected to a hook via a cable. The first adjusting rod is connected to both sides of the fixed base via a first rotating shaft, and the other end of the first adjusting rod is connected to a second adjusting rod via a second rotating shaft. A connecting plate is installed on the inner side of the two second adjusting rods. Through the double-shaft rotation structure of the first and second adjusting rods, the distance between the two second adjusting rods can be flexibly adjusted without disassembly: when passing through, it retracts to its minimum width to adapt to narrow passages and warehouse doors; when working, it unfolds to the corresponding size to cover manhole covers of different specifications throughout the ship, achieving seamless switching between pushing and working states, and solving the contradiction of a small hoist being too wide to pass through or too narrow to be usable.

The invention provides a multi-wireless network port aggregation method and device and a mobile terminal, and the method comprises the steps: a plurality of wireless network ports are aggregated into a virtual network port, the MAC addresses of the plurality of wireless network ports and the virtual network port are consistent, and the working mode of the virtual network port is a main / standby mode; wireless network port connections are established for the plurality of wireless network ports, only after the physical connection of the first wireless network port is established successfully, network configuration information is acquired, and the network configuration information comprises an IP address, a gateway, a subnet mask and a DNS; and storing the network configuration information as network configuration information of the virtual network port, and performing network configuration on the virtual network port according to the network configuration information. According to the invention, a plurality of network interfaces on the mobile terminal can be aggregated into the virtual network port, and seamless switching of main and standby network communication is realized.

The invention discloses a prediction content cache scheduling system based on machine learning. The prediction content cache scheduling system comprises a content feature perception module, a user demand prediction module, a dynamic cache decision module, a cache synchronization optimization module, a tracing audit module and an emergency guarantee module. According to the method, the content feature sensing module collects three types of core features of cloud game attributes, operation dependency and user interaction through multi-dimensional feature support, Min-Max normalization and one-hot coding standardization processing are carried out, a high-quality data set with a unified structure and a clear hot degree and delay sensitivity scoring rule are output, game priority quantification is controllable, and the game quality is improved. Decision subjectivity is avoided, a fusion model is constructed through a time sequence diagram neural network and a gradient boosting decision tree, association of regions and time accessed by players is captured, a nonlinear demand rule is mined, the prediction precision is remarkably improved after weighted fusion, a high-frequency iteration mechanism can quickly respond to sudden demands, and the problem of resource supply and demand mismatching is solved.

The embodiment of the invention relates to the technical field of new energy control, and discloses a station control system and a communication method thereof. In the invention, when a main redundancy box and a standby redundancy box receive downlink data from a main controller, the main redundancy box forwards the downlink data to the PRP dual network and synchronizes the forwarding state to the standby redundancy box; when the main redundancy box and the standby redundancy box receive uplink data from the PRP dual network, the main redundancy box forwards the uplink data to the main controller and synchronizes the forwarding state to the standby redundancy box; in the data forwarding process, if the standby redundancy box receives a redundancy box switching instruction, the standby redundancy box is switched to the main redundancy box; and the switched main redundancy box continues to forward the downlink data or the uplink data which are not forwarded yet according to the forwarding state. Therefore, the problem of network message loss in the redundant box fault switching process is solved.

The present disclosure provides a kind of automobile backup battery parallel control method and device, electronic equipment and storage medium, it is related to vehicle technical field, by when detecting that main battery power is lower than first preset threshold, trigger switching process, and in switching process, first by energy storage unit for load provides transient electric energy again sequentially complete main battery disconnect, backup battery access and energy storage unit exit, simultaneously when generator starts and main battery power is lower than second preset threshold, preferentially charge for main battery until its power recovers to third preset threshold after executing back operation, therefore, it can solve the problems that power supply is interrupted in switching moment in prior art, main battery cannot be preferentially charged when power is depleted, and cannot be automatically back to restore main battery power supply mode, achieve the technical effects of seamless switching of main and backup battery, guarantee load power supply continuity, preferentially maintain main battery health status and automatically restore main battery power supply mode.