229results about How to "Solve battery life" patented technology

The invention discloses a mobile charging method, device, and system for vehicle. The mobile charging method includes: acquiring electric quantity information, positioning information and driving information of a vehicle to be charged; sending charging request information carrying the electric quantity information, the positioning information and the driving information to a server so as to allow the server to determine a power supply vehicle and meet path information for the vehicle to be charged according to the electric quantity information, the positioning information and the driving information, wherein the meet path information is used for allow meeting between the power supply vehicle and the vehicle to be charged; and allowing the vehicle to be charged to receive electric energy from the power supply vehicle according to a preset charging manner while the power supply vehicle meets the vehicle to be charged according to the meet path information. The vehicle to be charged can be charged during a traveling process, the endurance problem is overcome, and a designated form route does not have to be changed.

The invention discloses a two-unmanned-aircraft system capable of being charged in air and improving endurance capability, and relates to the technical field of aircrafts. The system comprises a master unmanned aircraft, a sub unmanned aircraft, and an aerial-charging butting mechanism, wherein the master unmanned aircraft and the sub unmanned aircraft are connected together through the aerial-charging butting mechanism so as to form a two-unmanned-aircraft system; the aerial-charging butting mechanism consists of a butting control mechanism which is fixedly mounted under the master unmanned aircraft, and butting plugs which are fixedly mounted above the sub unmanned aircraft. According to the system, the endurance problem of a conventional unmanned-aircraft system can be solved; the system can be charged in the air, so that the endurance of the system is improved, and the purpose of infinite flight is realized; the system solves the problems that in the prior art, when two separated unmanned aircrafts perform a task in long-time flight, the task is interrupted, and the positions of the aircrafts are not accurate; the system overcomes the defect that an unmanned aircraft is unchangeable in load and flying time.

The present invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned ship hangar system, including unmanned aerial vehicles, unmanned ships and communication systems. The unmanned aerial vehicles are composed of two or more unmanned aerial vehicles. The UAV body and the onboard control system are composed. The unmanned ship is equipped with a shipboard platform, a shipboard control system and a shipboard power system. The UAV group is set on the shipboard platform. The communication system includes shipboard communication equipment and For the airborne communication equipment on the UAV, the shipboard control system and the shipboard communication equipment should be set correspondingly, and the airborne control system should be set correspondingly to the airborne communication equipment. The invention integrates the technical advantages of the existing unmanned ships and UAVs, not only realizes the effective complementation of the functions of the unmanned ships and the UAV group in the water area and the air space, but also makes up for the disadvantages of the vertical operation of the unmanned ships in the water area in the air space, and at the same time solves the problem of unmanned ships. The difficulty of human-machine endurance in waters and large-scale communication has greatly improved the work efficiency and duty performance of drones.

The invention provides an electric automobile capable of achieving unlimited long-distance endurance and tracked mobile charging and power supplying systems of the electric automobile. According to the technical scheme, guide rails for supplying power are laid on the two sides of a center isolating strip of a highway, the electric automobile with a brush and a navigation control device can be connected with the guide rails for charging and power supplying in the traveling process, and in this way, by means of the guide rails serving as the charging and power supplying systems, the electric automobile can achieve unlimited long-distance endurance on the highway. The method can solve the problems that a current electric automobile is limited in endurance mileage and can only travel locally for the short distance, and the cost of batteries is high, and is beneficial for the development of electric automobile industries and popularization of electric automobiles.

The invention relates to a non-contact movable intelligent charging method for an electric vehicle and a system thereof. The system is characterized by comprising a charging post and a vehicle-mounted charging terminal, and duplexing communication is realized between the charging post and the vehicle-mounted charging terminal by a 2-27MHz shortwave communication mode. The invention has the following beneficial effects that the system can charge electric vehicles in normal running in a non-contact mode so as to finish charging for the electric vehicles in the running process, avoid the limitation that the electric vehicles need to be stopped for charging, indirectly solve the problems of limited endurance capability of rechargeable batteries and longer charging time, effectively solve the problems of charging distance, charging efficiency and the like by calculating and adjusting the transmitting frequency of a magnetic resonance charging circuit in real time, completely realize intellectualization in the charging process, and have practicability and safety as well as efficiency and energy conservation.

The invention discloses a robot to clear underwater hull attachments and belongs to the technical field of vessel washing. The robot comprises a frame, the frame is rectangular, the lateral side of athruster that is provided with blades which are hollow, a partition is arranged in each blade, support strips evenly distributed are connected between upper and lower surfaces of each partition and the inner wall of the inside of the corresponding blade, four cleaners are distributed evenly at the bottom of the frame, a battery is arranged in the middle of the surface of the frame, a control panelis connected to the surface of the battery, the surface of the battery is also connected with a solar receiving board through a telescopic rod, each side of the frame of the frame is provided with acamera and a probe lamp, and one face of the frame is also connected with an attracting device. The robot of the invention can clear hull attachments and wipe off coating, has good stability in water,and has great underwater operating capacity and long battery life.

The present invention discloses a method and apparatus for preventing erroneous start-up of an application in a mobile terminal. The method comprises: acquiring a black screen gesture input on a touch screen of a terminal by a user when the terminal is in a standby state; matching the black screen gesture to a preset black screen gesture for opening an application; and when the matching succeeds, performing a fingerprint recognition operation, and determining whether to start up the application corresponding to the current black screen gesture according to a recognition result. According to the method and apparatus for preventing erroneous start-up of the application in the mobile terminal provided by the present invention, the problems of reduced standby capability and poor user experience of the mobile terminal due to the erroneous start-up of the application are solved, and the step of fingerprint recognition is added besides determining the start-up gesture of the application, so that the effects of improving the standby capability and user experience of the mobile terminal are implemented.

The invention discloses a combined heat and power system for an electric vehicle fuel battery and a control method of the thermoelectric combined supply system. An electric vehicle comprises a fuel battery system, a power battery system and a drive motor, wherein the fuel battery system adopts a hydrogen fuel battery; and the hydrogen fuel battery supplies power to the drive motor through an inverter after being connected to the power battery in the battery system in parallel. The invention further discloses a control method of the combined heat and power system. According to the technical scheme, the electric vehicle endurance problem is effectively solved, and the fuel battery continuously charges the whole vehicle power system after SOC is lower than certain value; while meeting the requirement of providing electric energy to the whole vehicle, the fuel battery further continuously supplies heat to a passenger compartment and the power battery system under a low-temperature condition; and the hydrogen oxygen fuel battery is taken as a reaction device, so that the combined heat and power system is clean, is environmentally friendly, is free of pollution, is rich in hydrogen gas reserve volume, is wide in source, is small in fuel battery noise, and is low in energy consumption.

The invention discloses a method for renting a shared power bank, wherein a mobile terminal and a server thereof are utilized. The method comprises the steps of transmitting a querying instruction of a device terminal to a server through an APP or network platform, transmitting device terminal distribution position of a location of the mobile terminal APP or network platform by the server through GPS arrangement setting of the mobile device terminals, and displaying the device terminal distribution position on the mobile terminal APP or network platform, performing feedback to the server after a user selects the device terminal at a determined position, querying whether the device terminal is provided with the shared power bank which can be rented, if yes, performing feedback to the device mobile terminal APP or network platform, after the mobile terminal APP or network platform confirms borrowing of the shared power bank, transmitting an instruction for borrowing the preset power bank to the mobile device terminal APP or network platform by the server, and executing the instruction by the device terminal for borrowing the shared power bank. The method can realize a fact that the device terminal can be accurately searched through the mobile terminal APP or network platform when the user cannot find the device terminal.

The invention discloses a multifunctional off-grid type charging pile using methanol as fuel. The multifunctional off-grid type charging pile comprises a whole vehicle control system, a motor control system, an intelligent electric distribution system, an electric vehicle motor, a battery managing system, a fuel supply system, a fuel battery system, an intelligent charging pile, an emergency electric source system, and a power battery system, wherein the whole vehicle control system is connected with the motor control system, the battery managing system, the fuel battery system and the power battery system; the motor control system is connected with the intelligent electric distribution system and the electric vehicle motor; the intelligent electric distribution system is connected with the battery managing system, the fuel battery system, the intelligent charging pile, the emergency electric source system and the power battery system. According to the multifunctional off-grid type charging pile using methanol as fuel disclosed by the invention, alcohol hydrogen fuel which is free from pollution is used for solving the problems of the endurance of an electric vehicle, the charging of the electric vehicle and the electric supply of a communication base station, and the multifunctional off-grid type charging pile has the characteristics of being convenient to operate, short in starting time, long in charging time, low in occupied space, light in weight, low in noise, free from pollution and the like.

The invention discloses an unmanned aerial vehicle (UAV) rapid and autonomous continuation system and method. The system comprises a UAV controller which is used for receiving the electricity value of a battery in a UAV battery compartment in real time and sending UAV model information and a landing signal to an intelligent landing station when the electricity value of the battery in the UAV battery compartment is lower than or equal to a preset electricity threshold. The intelligent landing station is internally provided with an instation controller and an image acquisition device. The intelligent landing station is also internally provided with a landing guiding and fixing device which is used for guiding a UAV to land precisely in a preset height range of the intelligent landing station and fixing the UAV to be stable. The battery storage position information of an instation battery compartment matched with the UAV model information is stored in the instation controller. The instation controller controls a battery replacement mechanism to grasp a battery at the corresponding battery storage position in the instation battery compartment to replace the battery in the UAV battery compartment according to the UAV model information, and the unmanned aerial vehicle rapid and autonomous continuation is realized.

The invention provides a power distribution station indoor equipment floor space collaborative routing inspection device and a routing inspection method thereof. The top of a four-wheel walking robotbody is provided with a parking apron allowing an unmanned aerial vehicle to take off and stop, a positioning mark for determining the position of the unmanned aerial vehicle is arranged on the parking apron, and the front part of the robot body is provided with an ultrasonic sensor and a laser sensor; four rotor wings of the four-rotor unmanned aerial vehicle are provided with rotor wing protection shells correspondingly, a UWB positioning label is arranged at the top of the four-rotor unmanned aerial vehicle, and a landing gear is arranged at the lower part of the four-motor unmanned aerialvehicle; the routing inspection device is installed on the unmanned aerial vehicle; a robot is connected with the unmanned aerial vehicle through a telescopic cable, the collecting and releasing of the telescopic cable is controlled by an electric winder installed on the robot, and the cable is composed of an unmanned aerial vehicle power line powered by the unmanned aerial vehicle and a communication line between the cable and the unmanned aerial vehicle power line. According to the power distribution station indoor equipment floor space collaborative routing inspection device, high-precisionpositioning is realized by utilizing the robot, the unmanned aerial vehicle can detect the vertical direction of a power distribution station large-scale frame machine, and the power distribution station indoor equipment floor space collaborative routing inspection device has the characteristics that the routing inspection is free of dead corners, the detection precision is high, and the detection efficiency is high.

The invention discloses a multi-functional unmanned aerial vehicle intelligent take off and land station system which comprises a visual coarse positioning module. The visual coarse positioning module comprises an instation controller which is connected with an image acquisition device. The image acquisition device is arranged in a take off and land station and is used for acquiring an unmanned aerial vehicle image in real time, and transmitting the image to the instation controller. An airborne controller controls the landing height of an unmanned aerial vehicle and the head direction of the unmanned aerial vehicle. The system further comprises a fine positioning module which comprises a support frame which is used for carrying the unmanned aerial vehicle. Grooves which match rotors of the unmanned aerial vehicle are arranged on the support frame. A notch is arranged on the side, which contacts the unmanned aerial vehicle support frame, of each groove. The notches are used for supporting and fixing the unmanned aerial vehicle. The system further comprises a self-sustaining module which is used for receiving the electric quantity information and the battery position information, which are transmitted from the airborne controller, of an unmanned aerial vehicle battery compartment, and charging the unmanned aerial vehicle battery compartment lower than or equal to the preset electric quantity information to realize self-sustaining of the unmanned aerial vehicle.

The embodiment of the invention discloses an unmanned aerial vehicle trajectory and resource allocation joint optimization method for multi-carrier wireless communication. The method comprises the following steps: S1, creating an optimization model for multi-node energy-carrying communication based on an unmanned aerial vehicle; S2, splitting the optimization model, and respectively carrying out iterative solution on split sub-models; S3, fixing the trajectory of the unmanned aerial vehicle, and optimizing the resource allocation variable of the unmanned aerial vehicle; S4, fixing unmanned aerial vehicle resource allocation, and optimizing the flight path of the unmanned aerial vehicle; and S5, performing flight path and resource allocation joint optimization of the unmanned aerial vehicleto obtain an optimal value of the optimization variable. According to the invention, simultaneous transmission of information and energy of a plurality of ground nodes by the unmanned aerial vehicleis realized; the problems of node information interaction and endurance time of the Internet of Things are solved, and meanwhile, the design complexity of the receiver can be effectively reduced; andthe communication link is improved through the flight path of the unmanned aerial vehicle, the wireless resource utilization rate is improved, and the maximization of the data transmission rate is realized.

The invention discloses an electric-vehicle battery replacement method and device, a readable storage medium and computer equipment. The method includes: receiving a search instruction sent by a userterminal, wherein the search instruction is used for searching for a battery which can be used for replacement; acquiring first location information of the user terminal; finding the battery, which isin a preset area range and can be used for replacement, according to the first location information; and sending a second location information of the battery, which can be used for replacement, to the user terminal to enable a user to go to a location, which corresponds to the second location information, for battery replacement. According to the method, a principle of battery replacement is adopted, when electricity of an electric bicycle of the user is about to be exhausted, the battery which is near the same and can be used for replacement can be searched for, through sending the second position information of the battery, which can be used for replacement, to the user terminal, the user can find the corresponding battery, which can be used for replacement, according to the second position information for replacement, and demand for continuous driving is satisfied, and thus problems of low endurance mileage and difficult charging of the prior art are effectively solved.

The invention discloses a hinged folding scooter bag comprising a folding footboard, a bag body, wheels, a guide mechanism, a brake system, a motor, a battery, and a motor control system. The hinged folding scooter bag is portable, trafficable and comfort for driving, can be ridden, pulled or carried, can be carried in other vehicles or indoors, allows start and destination to be linked seamlessly, is a novel complementary vehicle, helps improve experience of travel by bus, allows subways and rapid transit systems to be more conveniently utilized, provides less frequent vehicle transferring, and makes time of going shorter, so that traffic jam is alleviated and greenhouse gas emission is reduced. The hinged folding scooter bag can be quickly folded with one hand at one step and is flexible to steer. The battery in the hinged folding scooter bag is used as a mobile power source. The volume of the hinged folding scooter bag can be varied according to travel needs.

The invention discloses an air unmanned aerial vehicle mobile charging system based on an airship. A power supply system comprises the airship, an unmanned aerial vehicle, a microwave power supply end, a microwave power receiving end and an intelligent controller; the airship is used as a power supply end of the system; the unmanned aerial vehicle is used as a power receiving end of the system; the airship is used as a transmitting end of microwave wireless power supply; a microwave rectifying antenna and a charging circuit are integrated on the unmanned aerial vehicle as a receiving end; andby using microwave wireless power supply to perform wireless charging on the multiple unmanned aerial vehicles with insufficient power, problems of insufficient endurance and troublesome charging of an existing unmanned aerial vehicle are solved, the working times of the multiple unmanned aerial vehicles are prolonged, and the working efficiency of the multiple unmanned aerial vehicles is enhanced.

The invention discloses an unmanned plane mounted nuclear radiation detection device. The device comprises an unmanned aircraft, an aerial photography camera, a nuclear radiation sensor, a microcontroller, a wireless communication device, and a solar cell panel. The device can enter a high radiation region, which a ground person cannot enter, for detection, quickly detects the type of radionuclides and the dosage of nuclear radiation in the region, and guarantees the personal safety of a technician. Meanwhile, the device also can carry out the aerial photography of the resources of a complex terrain region and the environment radioactivity. Through an airborne solar cell panel power supply system, the device can work for a long time without worrying the duration. The ground person can freely control an unmanned plane to detect a target region according to a picture taken by the aerial photography camera.

The invention provides a full-automatic unmanned aerial vehicle service desk for electric power inspection and a using method. The full-automatic unmanned aerial vehicle service desk comprises a protective shell, a solar cell panel, a skylight, a window opener, a lifting platform, a communication module, a controller, a power module, a wireless charging base and a straightening device, wherein thesolar cell panel and the skylight are arranged at the top of the protective shell; the window opener is connected with the skylight; the lifting platform is arranged below the skylight; the wirelesscharging base and the straightening device are arranged on the lifting platform, and the wireless charging base is arranged on the inner side of the straightening device; the solar cell panel, the power supply module and the wireless charging base are electrically connected; and the window opener, the lifting platform, the straightening device and the communication module are connected with the controller. The full-automatic unmanned aerial vehicle service desk can solve the problems that an unmanned aerial vehicle is poor in cruising ability and cannot execute remote tasks, and can realize that the unmanned aerial vehicle can complete full-automatic power inspection tasks without manual intervention and assistance.

The invention is applicable to the communication field and provides a method and a device for switching central processing unit (CPU) working modes according to application scenarios. The method includes detecting a current application scenario of a terminal; switching to a corresponding CPU working mode according to the detected application scenario and a preset mapping table of the application scenarios and the CPU working modes. By means of the method and the device, power consumption of the terminal can be reduced, and the cruising ability of batteries is improved.

The invention discloses a series hybrid amphibious robot. The series hybrid amphibious robot comprises an engine, an electric generator, a power battery, motors, a reducer, driving wheels, continuoustracks, a controller, an air condition compressor, a drainage pump, a hydraulic power unit, a water-jet propulsor, a control panel, a wireless transceiver and a robot body. The robot can travel on land by means of the continuous tracks, can also travel in water by means of the water-jet propulsor, and meanwhile can quickly pass through the shallow water by means of synchronous work of the continuous tracks and the water-jet propulsor. The robot has good trafficability, steering performance and fuel economy in most complicated working conditions, the robot is driven by means of series hybrid power, and the problems of short endurance mileage, small power, long charging and too large self-weight caused by a large number of motors and batteries in most motor driven amphibious robots are solved.

The invention discloses an electric automobile hybrid energy storage charging system which comprises a charging pile, a transformer, a rectifier, an assistant accumulator, a direct current (DC) / direct current (DC) convertor and a power battery. The rectifier, the assistant accumulator, the DC / DC convertor and the power battery are arranged on a pure electric automobile. The charging pipe is connected with a primary side of the transformer. An input side of the DC / DC convertor and a super-capacitor are connected on a secondary side of the transformer in a parallel mode. An output side of the DC / DC convertor is connected with the power battery; the power battery is connected with a drive motor through a vehicle-mounted motor controller. The assistant accumulator is a titanium acid accumulator or a super capacitor. The electric automobile hybrid energy storage charging system provides a novel charging energy storage scheme for the pure electric automobile.

The invention discloses an unmanned aerial vehicle energy supply platform of a multiple energy supply system and an operating method of the unmanned aerial vehicle energy supply platform. The unmannedaerial vehicle energy supply platform comprises a navigation mark platform, an energy collection module, an energy storage module, a wireless charging module, an unmanned aerial vehicle platform anda management system, wherein the energy collection module comprises a solar power generation module, a wind power generation module, a fuel cell module and a water flow energy power generation module;the unmanned aerial vehicle platform is arranged at the top of the navigation mark platform; the wireless charging module used for charging an unmanned aerial vehicle is arranged in the unmanned aerial vehicle platform; and a storage battery of the battery module is connected with the wireless charging module to provide charging service for the unmanned aerial vehicle. According to the unmanned aerial vehicle energy supply platform and the operating method, the construction cost of base stations and unmanned aerial vehicle mother ships can be reduced, and meanwhile, the problem of endurance of the unmanned aerial vehicle is effectively solved; the mode of solar energy-wind energy-water flow energy joint power supply is adopted, so that the problems of stability and capacity of the power supply to the navigation mark are solved; meanwhile, the applied thermal management design can obviously improve the environmental adaptability of the battery module; and by means of the operating method, the safe, reliable and efficient operation of the navigation mark platform is ensured.

The invention discloses a mobile communication signal analysis method and a mobile communication signal analysis system based on an unmanned plane and aims to solve a problem of poor network optimization existing in driving tests in the prior art. The method comprises steps that, the position information of the unmanned plane is acquired; a wireless signal is received by utilizing an antenna mounted on the unmanned plane; the wireless signal received through the antenna is modulated to be an emission signal which is then emitted to the ground; the emission signal is received, and a wireless signal is acquired through demodulation; and network optimization is carried out according to the position information and the wireless signal after demodulation. The system further comprises an unmanned plane unit, a wireless signal acquisition unit and a network analysis system, wherein the unmanned plane unit and the wireless signal acquisition unit are separately connected with the network analysis system. According to the method and the system, the antenna, a GPS module, an image module and a mounting device are carried by the unmanned plane, and a problem of network optimization acquisition data area limits is solved to a certain degree.

The invention discloses an information processing method and electronic equipment. The electronic equipment is provided with a first antenna unit and a second antenna unit at least. The first antenna unit is arranged at a position which corresponds with the first side of the electronic equipment. The second antenna unit is arranged at a position which corresponds with the second side of the electronic equipment. Whether the electronic equipment satisfies a preset condition is determined, and a first determination result is acquired. When the first determination result indicates a fact that the electronic equipment satisfies a preset condition, controlling for keeping one in the first antenna unit and the second antenna unit in a working state, and controlling for keeping the other in the first antenna unit and the second antenna unit in a non-working state.

The invention relates to a power type battery pack module and a battery intelligent management system of an electric automobile, wherein the power type battery pack module has the advantages that the battery replacement is fast, the maintenance of a battery management system is simple, and the power type battery pack module can be fast mounted or dismounted. The power type battery pack module comprises a plurality of charging and discharging batteries installed in the battery pack module; the battery pack module is plug and play and is arranged in a battery box arranged on the electric automobile in an inserting and buckling type dismountable structure; a charging and discharging terminal and a data communication port connected with a vehicle-mounted intelligent control unit are arranged on a casing; the battery pack module is also provided with a temperature lowering mechanism and an intelligent control circuit used for controlling the charging and discharging terminal to be connected or disconnected with the outside. The problems of too high temperature, poor heat radiation, short service life and poor cruising ability of the power batteries in the use process are dynamically solved. When the maintenance is needed, the maintenance cost can be greatly reduced, and meanwhile, the arrangement position of the battery box is very flexible. At ordinary times, too many battery pack modules do not need to be installed during the short-distance driving; partial battery pack modules can be put in a garage for standby or put in the garage for charging; the total weight of the electric automobile is greatly reduced.

The invention provides a real-time transmission ocean power parameter buoy system. A lower end of a communication buoy is hung with a coupling transmission cable, and the upper end of the coupling transmission cable is provided with a sensing coupling data receiving ring, the lower end is provided with a sensing coupling data sender, and the middle part is provided with a warm depth measuring instrument and a warm salt depth measuring instrument; the lower end of the coupling transmission cable is hung with an acoustics Doppler flow velocity section plotter and an acoustics Doppler flow velocity section plotter cell silo through a buckle; a data conversion circuit of the acoustics Doppler flow velocity section plotter is connected with the sensing coupling data sender through a watertight feed line; the lower end of the acoustics Doppler flow velocity section plotter is connected with a float ball, and the lower end of the float ball is provided with a rotating ring; the rotating ring is connected with an acoustics releaser; the acoustics releaser is connected with a steel cable and a sinking block through a hoisting ring. By using the sensing coupling technology, the real-time transmission ocean power parameter buoy system transmits data with the sensor, and data is uploaded to a shore through a sea network; thus the real-time uploading and treatment can be realized.

The invention relates to an electric automobile with a self-charging function. The electric automobile comprises an automobile body which comprises a chassis frame and a shell. The chassis frame comprises a frame body and a battery. The battery is installed on the frame body. The electric automobile is characterized by further comprising a solar cell panel, an inverter, a V-shaped conducting elastic piece, a conductive contact and a pull handle. The solar cell panel is assembled on the frame body in a sliding mode. The inverter is installed on the frame body and electrically connected with the battery. The V-shaped conducting elastic piece is installed on the frame body and electrically connected with the inverter. The conductive contact electrically connected with the solar cell panel is fixed to the solar cell panel. The pull handle is an L-shaped pull handle and is installed on the solar cell panel. Saw teeth mutually corresponding are arranged on the upper portion of the pull handle and the lower portion of the frame body. The pull handle is connected with a housing which is a part of the shell. The solar cell panel can be utilized for self-charging, and appearance of the electric automobile is not affected.

The invention discloses an electric commercial vehicle battery replacing system, and the system comprises an electric commercial vehicle with a replaceable battery pack and a battery replacing station. The system is characterized in that a transverse battery bin is arranged at the bottom of a girder of the electric commercial vehicle, a bin door is arranged at one end of the girder, and a connecting socket butted with a battery pack plug is arranged on the other end wall opposite to the bin door; an in-bin track is arranged in the battery bin and is matched with a battery pack roller; the battery replacing station comprises a battery replacing trolley and a charging pile; the battery replacing trolley comprises a base provided with a walking mechanism and a lifting frame arranged on the base and driven by a lifting mechanism to ascend and descend, the lifting frame is provided with a frame rail matched with battery pack rolling wheels, and the frame rail is provided with a battery packpush-pull mechanism; the charging pile is provided with a pile track for the battery pack to slide, and a charging socket is arranged on the plugging panel at the end of the charging pile. The specification standardization of the battery packs of the electric commercial vehicles with different tonnages is realized, the battery packs are replaced by the same set of battery replacing equipment, thebattery replacing efficiency is high, the cost is extremely low, the popularization is easy, and the problem that the electric commercial vehicles cannot be popularized is thoroughly solved.

The embodiment of the invention discloses a screen control method applied to a terminal, and the method comprises the steps: obtaining multiple frames of continuous images in a preset time period; determining a high-frequency dynamic area and a low-frequency dynamic area in the screen according to the multiple frames of continuous images; calculating coordinate ranges of the high-frequency dynamicarea and the low-frequency dynamic area on the screen; adjusting the refresh frequencies in the coordinate range of the high-frequency dynamic area and the coordinate range of the low-frequency dynamic area according to a preset rule; and performing content display based on the adjusted refresh frequency. The invention further provides a terminal computer readable storage medium, by implementingthe scheme, the problem that in the prior art, power consumption is too large due to setting of the terminal screen refresh frequency is solved, and the user experience is improved.