517 results about "Battery (electricity)" patented technology

The invention relates to the technical field of intelligent power supplies, in particular to an intelligent power supply for an unattended station. Comprising a multi-source power supply scheduling unit; an intelligent energy storage management unit; a double-link communication unit; the double-link communication unit is used for constructing a multi-redundancy communication link of wired, wireless and power line carriers, and the double-link communication unit is based on link quality data, adopts an automatic switching strategy to guarantee data transmission continuity, preprocesses monitoring data by using an edge side data clustering algorithm, and realizes offline data caching and transmission flow optimization. Through a multi-source energy dynamic scheduling strategy, according to photovoltaic real-time output, commercial power time-of-use electricity price and load electricity demand, power supply paths of photovoltaic, commercial power and a storage battery can be dynamically optimized, the consumption proportion of clean energy is improved, the dependency degree of high-cost commercial power is reduced, a complex energy structure of photovoltaic, commercial power and storage battery multi-energy complementation is effectively adapted, and the energy utilization rate is improved. And power supply flexibility is enhanced.

The invention relates to a system for a user-side energy storage sharing framework. A power energy scheduling optimization method comprises: establishing a user load model, an energy storage battery model and a user-to-user capacity sharing model; with a minimum electricity cost of a whole community as an objective optimization function, resolving optimal scheduling based on the function using a MILP algorithm as an optimization technique for power energy scheduling of a user-side energy storage sharing framework; and performing power energy scheduling for users according to a resolved result. The invention determines a user cost model under the user-side energy storage sharing framework, establishes an electricity model of non-transferable loads and transferable loads and corresponding constraints, and obtains optimal values of adjustable variables to control electricity consumed by electric loads by resolving an optimal value of an objective function under the precondition of reducing user costs, thus further reducing electricity costs.

Various implementations include a low temperature sample rod device for side entry electron microscopes. The device includes a conduction rod, a thermoelectric module, a coupler, and a thermal battery. The conduction rod has a first end configured to support a sample. The thermoelectric module has a first side thermally coupled to a second end of the conduction rod. The thermoelectric module is configured to transfer heat between the first side and a second side when supplied with electricity. The coupler has a first coupling surface thermally coupled to the second side of the thermoelectric module. The thermal battery has a battery coupling surface configured to be thermally coupled to a second coupling surface of the coupler. The thermal battery includes a material that can be melted from solid to liquid phase by heat transferred from the conduction rod, through the thermoelectric module, through the coupler, and into the thermal battery.

The invention discloses a cold-heat-electricity-hydrogen-water-oxygen combined supply system based on wind and light utilization and an operation method, and belongs to the technical field of comprehensive energy, electric energy of the system is mainly supplied by a wind power generation device, a photovoltaic photo-thermal assembly, a hydrogen fuel cell and a storage battery, and oxygen and hydrogen are generated by a proton exchange membrane water electrolysis device; clean fresh water comes from a hydrogen fuel cell power generation by-product, heat mainly comes from waste heat of a photovoltaic photo-thermal assembly and a power generation device, and cold energy is supplied by an absorption refrigeration device driven by hot water of the system or electric refrigeration. According to the system and the operation method, stable and efficient heterogeneous energy self-sufficiency is achieved by adopting the technologies of power generation device waste heat gradient utilization, plateau hydrogen internal combustion engine output oxygen combustion supporting, hydrogen storage device system internal cooling, wind and light absorption promotion and power grid adjustment through the hybrid energy storage device and the like. The method fully considers the association of wind and light fluctuation, system energy supply and power grid mutual assistance, and has the capability of stable operation of the system under complex and severe conditions.

The invention belongs to the technical field of power grid systems, and particularly relates to a cooperative scheduling method for a water-electricity-heat combined supply negative carbon building light-storage direct-flexible energy microgrid group. Comprising the following steps: constructing a negative carbon building light storage direct-flexible energy microgrid group mathematical model; wherein the mathematical model comprises a generator constraint model, an external power grid and micro-grid group exchange power constraint model, a power balance constraint model, a peak-valley difference constraint model, a storage battery constraint model, a phase change heat storage system operation constraint model and a water supply system operation constraint model; constructing a target function of the scheduling model by taking the minimum total operation cost of the negative carbon building light storage direct-flexible energy microgrid group in a scheduling period as a target; wherein the total operation cost comprises electric power procurement cost, carbon emission cost, energy storage cost, fuel cost and peak-valley difference punishment cost. Through linkage of the electricity storage system, the heat storage system and the water storage system, the utilization rate of renewable energy sources and the flexibility of the system are maximized.

The invention provides a cooperative control method and device for low-voltage power consumption of a whole vehicle and electronic equipment, and relates to the technical field of automotive electronics, and the method comprises the steps: obtaining multi-modal original data (including vehicle state information, environment information and user behavior information), and carrying out the preprocessing; performing feature extraction and fusion processing on the preprocessed multi-modal original data to generate a high-level semantic event used for representing the vehicle leaving intention of the user or the parking scene; matching a global power consumption management strategy of a high-level semantic event through a hierarchical finite-state machine model; and according to the global power consumption management strategy, executing hierarchical power supply control on the low-voltage electricity load of the whole vehicle, and in the hierarchical power supply control process, dynamically adjusting control parameters in the global power consumption management strategy based on a comparison result of the actual power consumption monitoring data and a preset baseline model. Depth power shortage of the storage battery caused by redundant power consumption is effectively avoided, the risks that the vehicle cannot be started and equipment is abnormal are reduced, and the reliability of the whole vehicle and the user experience are improved.

A feed mixer assembly having a feed mixer platform on which is mounted a hopper with an auger assembly rotatably mounted therein. A first electric motor drives the auger via a main gearbox. A battery assembly on the platform provides electricity via a first inverter to power the electric motor. A control gearbox assembly mounted on the platform includes a three-way gearbox disposed to transfer power between a first driveshaft coupled to an external power source; a second driveshaft coupled to a pump, and a third driveshaft coupled to an electric motor / generator. Power from the external power source can be used to drive the pump and / or generate electricity from the electric motor / generator for storage by the battery. Alternatively, the electric motor / generator, powered by the battery, can be used to drive the pump.

The invention relates to a construction vehicle (1).A battery module (40; 240; 340) is provided to supply electricity to at least one electric motor (80, 87) of the construction vehicle (1).A fastening structure (70; 270) of the battery module (40; 240; 340) is designed to be removably fastened to a first longitudinal member (10-1), in a fastening position located beneath the cab (29) in the vertical direction (C-C) of the construction vehicle (1), and the battery module (40; 240; 340) in the fastening position is accessible from an outer side of the construction vehicle (1) so that said module can be brought into or out of the fastening position from the outer side of the construction vehicle (1).

The invention discloses a metal shell welding device for oxyhydrogen cutting machine machining, and relates to the technical field of metal shell welding tools. Through cooperation of the mechanical arm and the second electromagnet, the movement and the welding angle of metal plates can be conveniently controlled, and through cooperation of the first electromagnet, the second electromagnet and the storage battery, the magnetic attraction size can be conveniently adjusted according to the weights of different metal plates; the analysis unit judges the position of the adsorption point and generates an adsorption adjustment signal to adjust the position of the connecting seat, so that the metal plate is adsorbed firmly, the position is accurate, the metal plate is more stable in the moving process, and the dislocation condition of the welding position is reduced; accurate adsorption point positioning can guarantee uniform distribution of acting force around adsorption points of the metal plate, damage to the electromagnet and the mechanical arm due to uneven stress is avoided, after stress is uniform, consumed electric energy is less when the electromagnet adsorbs the metal plate with the same weight, and equipment is more energy-saving.

A fail-safe automatic mains-electricity cutoff system and method for automatic disconnection from a mains service drop in the event of mains power outage or instability, and automatic reconnection after restoration of stable mains power, with indications of operational status through a unit display, an indicator light, and an RF communication link to a remote unit. A unit enclosure having a unit door and a ground bus houses the fail-safe automatic mains-electricity cutoff system which is installed on the mains service drop, below the electrical meter and above the main breaker panel or main service disconnect switch. Low-voltage DC power for system operation is supplied through a battery unit. Disconnection and connection to mains power is effected through a switching unit providing a mains-voltage sensor, a fail-safe switch and a fail-safe switch actuator. A premises-voltage sensor and current sensor can also be provided in embodiments. A controller controls operation of the fail-safe automatic mains-electricity cutoff system based on real-time measurements and programmed operational parameters, and records and reports system status and measurements.

The invention discloses a multi-energy complementary building energy supply system based on solar energy, and relates to the technical field of building energy supply, the multi-energy complementary building energy supply system comprises a solar photovoltaic panel, and an inverter is connected with a storage battery and an air source heat pump through wires. Light energy and wind energy are converted into electric energy through operation of the solar photovoltaic panel and the wind power generator, meanwhile, direct current provided by the solar photovoltaic panel and the wind power generator is converted into alternating current through the inverter, one part of the alternating current converted by the inverter supplies power to the air source heat pump, and the other part of the alternating current converted by the inverter is stored through the storage battery. Meanwhile, electricity stored in the storage battery can be supplied to the charging pile, when the air source heat pump is powered on to operate, energy can be supplied to the air conditioner through the heat storage tank and the cold storage tank, and when it is cloudy and rainy, power can be supplied to the air source heat pump through the storage battery; continuous and stable energy supply of the air source heat pump is achieved through cooperation of the solar photovoltaic panel, the wind power generator and the storage battery.

The invention discloses a multi-energy complementary system based on a data center. Comprising a data center, an energy pile group, a storage battery, an inverter, a solar PV / T plate, a middle-deep layer buried pipe heat exchanger, a water chilling unit, a user, an absorption refrigerating unit, a freezing water tank, a water segregator, a water collector, a waste heat pump unit, a heat storage water tank, a ground source heat pump unit, a cold and hot water tank, a plurality of four-way valves, valves, a cooling tower, a circulating water pump and a plate heat exchanger. All the devices are connected to form different loops. A graded heat storage system is constructed through a shallow underground structure energy pile group and a middle-deep layer buried pipe heat exchanger, gradient utilization of energy is achieved in combination with a solar PV / T plate technology, and a cold-heat-electricity combined supply integrated system is formed; the waste heat of the data center is complementarily coupled with terrestrial heat and solar energy, cross-seasonal heat storage is achieved through an underground structure, the comprehensive utilization efficiency of energy is effectively improved, and energy conservation and carbon reduction are achieved.

The present invention discloses a photovoltaic combined prefabricated cabin, which is applied in the technical field of prefabricated cabins. The present invention includes a cross bar, and legs are bolted to the bottom of the cross bar. A bottom plate is arranged on the top of the cross bar. By setting the cooperation of the cross bar and the legs, it is convenient to install and place the structure, and it is separated from the ground by a certain distance to avoid water accumulation caused by low-lying terrain. The arranged bottom plate cooperates with the mounting plate, which is convenient to install the bottom plate and the structures connected thereto on the top of the cross bar. The arranged left side plate, top plate, right side plate and bottom plate cooperate to form the four sides of the prefabricated cabin, and the front side and the rear side of the prefabricated cabin are closed by installing door panels. By setting the support in cooperation with the narrow bar and the outer frame, it is convenient to install the photovoltaic panels. The photovoltaic panels cooperate with the junction box and the externally connected controller, inverter and storage battery to generate electricity, so as to supply part of the electricity for the internal equipment, making the structure more energy-saving and environment-friendly.

The invention discloses an electricity-hydrogen-heat coupling new energy system and an energy management method thereof, and relates to the technical field of energy management, and the method comprises the steps: monitoring the difference power between the wind-solar power generation power and the load demand of a user, the outdoor temperature, the hydrogen storage capacity of a hydrogen storage tank, the charge state of a storage battery, and the heat storage capacity of a fused salt storage tank in real time; according to the difference power and the outdoor temperature, the following energy management strategies are executed: when the output of the wind power generation module and the solar photovoltaic power generation module is greater than the load demand, excess power is stabilized through hydrogen production of an alkaline electrolytic cell, charging of a storage battery and heating of a fused salt storage tank; when the output of the wind power generation module and the solar photovoltaic power generation module is smaller than the load demand, the solid oxide fuel cell, the gas turbine and the storage battery are used for meeting the load power consumption; according to the method, coupling control over electricity, hydrogen and heat is achieved, the wind curtailment and light curtailment rate is reduced, and the overall energy utilization rate of the system is improved.

A ship-shaped buoy water spraying type bird repelling device comprises a ship body and a navigation mark, the navigation mark is arranged in the middle of the ship body, the ship-shaped buoy water spraying type bird repelling device further comprises a control box arranged on the ship body, and a water pump and an inductive switch receiver are arranged in the control box; the water inlet pipe and the water outlet pipe are connected with the water pump and penetrate through the side wall of the control box; the branch pipe is connected with the water outlet pipe and is connected with the self-rotating spray head; and the microwave inductor is in signal connection with the inductive switch receiver. The induction switch starts connection after receiving a signal of the microwave inductor, the storage battery and the water pump are communicated with electricity, the water pump starts a water pumping function, water enters the water outlet pipe through the water inlet pipe, then enters the branch pipe and finally reaches the self-rotating type spray head, and the self-rotating type spray head rotates to spray water to drive birds. Birds cannot be hurt by adopting water spraying for bird repelling, meanwhile, water spraying for bird repelling is low in noise, sound and light pollution cannot be caused to residents on the water bank, and environmental pollution cannot be caused.

The invention discloses an intelligent greenhouse irrigation system taking water from air, which belongs to the field of agricultural engineering and intelligent control and comprises a greenhouse main body, a flow guide device, a photovoltaic module, a storage battery, a multi-source sensor, a digital twinborn module, an irrigation decision module, an intelligent execution module, a visual management platform and an ecological collaboration module. The greenhouse main body realizes cooling and condensed water collection by utilizing a surface functional coating, and water is guided into the water cellar through the flow guide device; the photovoltaic system cooperates with the phase-change material to realize power generation, heat storage and temperature compensation; the digital twinborn module is fused with multi-source data to construct a virtual model, and crop water demand and environment change are predicted; the irrigation decision module formulates an optimization strategy according to the water volume, the electric quantity and the prediction result; the intelligent execution module accurately controls irrigation and feeds back and adjusts in real time; and the ecological cooperation module is linked with regional environment data to realize overall management of greenhouse water consumption and ecological protection. According to the system, cooperative utilization of water resources and energy is achieved, and irrigation intellectualization is improved.

A system for managing vehicle charging adapted for a charging gun includes a communication bus, a battery, a sensor, an OBC, and a domain controller. The domain controller receives a first voltage and a second voltage that correspond to a current of charge to the battery from the sensor, and when determining that both the battery and the OBC are operating normally based on information received through the communication bus, notifies the OBC through the communication bus to start charging the battery with electricity received from the charging gun. When determining that an amount of charged power calculated using a calibrated voltage, which is obtained based on the first voltage or the second voltage, has reached a predetermined amount, the domain controller sends a stop message to the communication bus so as to notify the OBC to stop charging the battery.

The invention relates to a robust optimization regulation and control method and device for electricity-hydrogen collaborative distribution of a regional distribution network. The method comprises the following steps: constructing a regional distribution network electricity-hydrogen cooperative operation model according to operation parameters of a topological structure of the power distribution network, the reserve capacity of a storage battery, the reserve capacity of an alkaline electrolytic tank and the reserve capacity of a fuel cell; calculating the total uncertainty of the power distribution network according to the prediction deviation corresponding to the distributed photovoltaic unit, the fan, the power load of each power node and the hydrogen load of each hydrogen refueling station; constructing a target function by using an expected upper definite function of the second-class cost, the first-class cost and the income of the power distribution network; and constructing a regional distribution network power-hydrogen collaborative distribution robust optimization regulation and control model by combining constraint conditions, the constraint conditions comprising a hydrogen energy balance constraint, an affine constraint and a regional distribution network power-hydrogen collaborative operation model, solving to obtain an optimal solution of each decision variable, and regulating and controlling each device in the power distribution network topological structure by using the optimal solution of each decision variable. By adopting the method, the operation of each device in the distribution network can be coordinated more accurately.

The invention discloses a data-driven hydrogen-electricity hybrid power energy management method and device, and relates to the technical field of engineering control, and the method comprises the steps: calculating a hydrogen consumption predicted value of a fuel cell at a k + 1 moment by applying a TDL method according to an actual hydrogen consumption value of the fuel cell at the k moment and a historical SOC actual value of a lithium battery, and then calculating an SOC reference value of the lithium battery at the k + 1 moment, constructing an SOC prediction model in the prediction time domain at the moment k by applying a TDL method, and solving a power control increment sequence of the lithium battery in the control time domain at the moment k; and calculating the reference power of the lithium battery at the k moment according to the first item in the power control increment sequence and the reference power of the lithium battery at the k-1 moment, and further calculating the reference power of the fuel battery at the k moment, thereby realizing the control of the actual output power of the lithium battery and the fuel battery at the k moment. According to the invention, the optimal power distribution between the hydrogen fuel cell and the lithium battery can be realized, and the endurance time is prolonged.

The invention relates to the technical field of energy-saving and environment-friendly equipment, and discloses a slope vegetation rainwater collecting and irrigating device based on photovoltaic power generation and rainfall. Comprising a bottom plate and further comprises two sets of fixing frames fixed to the two sides of the bottom plate, connecting pieces are arranged on the inner walls of the fixing frames, photovoltaic panels used for collecting electricity are arranged on one sides of the connecting pieces, water tanks used for guiding water flow are formed in the inner walls of the photovoltaic panels, and the electrical output ends of the photovoltaic panels are electrically connected with an electricity storage box. According to the device, water flowing down from a water tank in a photovoltaic panel can be conveniently collected through arrangement of a water collecting tank, a filter screen can be conveniently fixed through arrangement of a pipe cover, impurities in rainwater can be conveniently filtered through arrangement of the filter screen, and through cooperative use of a connecting block and a rotating shaft, the rainwater can be conveniently stored in the water collecting tank. And the mounting frame can be conveniently adjusted, so that the filter screen can be conveniently mounted and dismounted, and impurities on the filter screen can be conveniently cleaned.

The present invention relates to a self-powered offshore buoy device, belonging to the field of marine equipment. It is composed of a floating ball, a floating ball connecting rod, a buoy floating body, an upper body bracket, a storage battery, a solar panel, an indicator light, a radar reflector device and a positioning device. When the device is placed on the water surface, the buoy itself can exhibit good stability with the undulation of the sea water, and can drive a permanent magnet generator to generate electricity by wave energy through a series of mechanical transmissions with the undulation of the sea water. Combined with solar power generation, the two complement each other, and can provide sufficient electric energy in any environment. Moreover, the device is provided with a radar reflector, which can be easily captured by the radar of ships, enabling the ships to predict the existence of the buoy in advance.

The utility model provides an electric cutting device, and relates to the technical field of electric tools. An electric cutting device comprises a first cutting element and a second cutting element, and the first cutting element and the second cutting element are connected in a pivoted mode. The first holding part and the second holding part can move relatively, the first holding part comprises a first shell, a driving part and a transmission mechanism, the driving part and the transmission mechanism are arranged in the first shell, one end of the transmission mechanism is connected with the driving part, and the other end of the transmission mechanism is connected with the first cutting element; when the electric cutting device is used, the first holding part and the second holding part are close to each other, after the pressure on the second holding part reaches a preset value, the driving part drives the transmission mechanism to move, and the transmission mechanism drives the first cutting element to rotate in the direction close to the second cutting element. The electric cutting device has the manual and electric shear function, electric power assistance is automatically carried out, and therefore the electric cutting device can save more electricity and prolong the endurance.

The invention provides a vehicle scheduling method and system based on a parking and charging integrated stereo garage. The method comprises the steps of obtaining real-time vehicle information and historical charging records of a to-be-charged vehicle; the real-time vehicle information comprises the residual electric quantity, the predicted driving distance, the predicted external power consumption and the predicted charging time; constructing a fuzzy evaluation model based on the vehicle information and the charging mode, and inputting the real-time vehicle information into the fuzzy evaluation model to obtain a preliminary charging mode; searching a historical similar scene based on the real-time vehicle information, and calling a historical charging mode to correct the initial charging mode to obtain a corrected charging mode; the driver preference and the time-of-use electricity price are obtained, and the charging duration is optimized based on multi-target linear programming; and calculating a comprehensive score based on the corrected charging mode, determining a charging sequence according to the score, and scheduling the vehicle for charging. The charging mode is corrected through fuzzy evaluation in combination with historical data, the duration is optimized through double-layer planning, the charging rationality and resource efficiency are improved, the cost is reduced, and the parking charging problem is relieved.

The invention relates to a method for comprehensively recycling a positive electrode material of a waste lithium iron phosphate battery, which comprises the following steps of: (1) discharging the waste lithium iron phosphate battery: providing a power supply by the waste lithium iron phosphate battery, and electrolyzing a lithium precipitation mother solution by using a three-chamber diaphragm electrolytic bath; (2) crushing and sorting; (3) two-stage leaching: leaching the lithium iron phosphate positive electrode powder with a sulfuric acid solution generated by electrolysis of a lithium precipitation mother solution, and adding an aeration disc at the bottom of a reaction kettle for aeration; adding a dilute sulfuric acid solution generated by electrolysis of lithium precipitation mother liquor into first-section leaching residues for leaching; (4) two-stage impurity removal; and (5) preparing lithium carbonate. According to the method, the lithium precipitation mother liquor for the waste lithium iron phosphate battery is discharged to prepare the sulfuric acid and sodium hydroxide-lithium hydroxide mixed solution for production, so that residual electricity is utilized, a production reagent is saved, and the problems of high energy consumption, large lithium loss and poor sale of a byproduct sodium sulfate in evaporative crystallization of sodium sulfate are solved; and the aim of circularly and comprehensively utilizing the waste lithium iron phosphate battery is fulfilled.

The invention discloses a method and device for automatically supplementing the electric quantity of a storage battery and a medium, and the method comprises the steps: carrying out the electric quantity monitoring of the storage battery, so as to determine whether the electric quantity of the storage battery continuously drops to an electric quantity threshold value or not; if yes, the running state of a vehicle engine is monitored to determine whether the running state of the engine affects the power of the whole vehicle or not; under the condition that the running state of the engine does not affect the power of the whole vehicle, the electricity supplementing generator is controlled to be started at the highest gear for automatic electricity supplementing; and under the condition that the running state of the engine affects the power of the whole vehicle, low-electric-quantity early warning is conducted, the electricity supplementing generator is controlled to be started at a low gear, and automatic electricity supplementing of the vehicle is achieved. The problem of insufficient electricity of the engine is solved, the risk of feed damage of the storage battery is reduced, the electricity utilization safety of the vehicle is guaranteed, unnecessary electricity supplementing operation is avoided, energy consumption and the burden of the engine are reduced, the durability and fuel economy of the engine are improved, and the running cost of the vehicle is reduced.

This invention discloses a method for reconstructing battery swapping station operation data based on adaptive truncation and feature correlation repair, belonging to the field of data reconstruction technology. First, a standardized two-dimensional spatiotemporal discrete model is constructed, and sequence mapping technology is used to align the discrete data stream to the date-time period operation space. Second, a zero-first truncation model based on the continuity of frequency distribution is established to adaptively remove outliers and noise. Then, Latin hypercube sampling and inverse cumulative distribution function transformation algorithms are introduced to fill in missing values ​​while ensuring that the reconstructed data conforms to the original probabilistic characteristics. Finally, the battery swapping frequency-electricity data is dimensionally reconstructed to facilitate the inductive analysis of battery swapping behavior characteristics. Numerical examples demonstrate that the method proposed in this invention effectively restores the statistical usability of the data, fully revealing the bi-peak tidal characteristics of battery swapping load and the distribution law of low-electricity anxiety, providing relatively reliable data support for load forecasting and regulation.

The invention provides an electric connection device and a battery replacement ship, and is applied to the technical field of ship battery replacement. The electric connection device comprises an electric connector, a shell, a protective cover and a protective sleeve; the electric connector is used for changing the electricity of the ship, and the shell, the protective cover and the protective sleeve are used for protecting the electric connector against water and damp air. The electric connection device further comprises a motor, a base and a guide rail arranged on the base, and the shell and the electric connector are movably connected with the guide rail after being fixed. Under the driving of the motor, the shell moves on the guide rail and drives the electric connector to move, so that the automatic butt joint of the electric connector is realized.

The present invention discloses a movable solar fountain driven by a float, belonging to the technical field of solar fountains. A movable solar fountain driven by a float comprises a floating body, a battery and a controller are arranged on the top of the floating body, a plurality of drive components are symmetrically arranged on the bottom of the floating body, a locking component is arranged on the front outer wall of the fixed box, and a water inlet component is fixedly installed inside the floating body. This device not only greatly increases the fun of the fountain, but also significantly reduces the power loss caused by relying on additional electricity to drive the movement of the fountain, greatly improving the endurance of the fountain. Secondly, during the rotation process, the blades can dynamically clean impurities attached to the surface of the filter screen. In addition, rotating paddles are arranged at both ends of the rotating rod. These rotating paddles can better cooperate with the multiple drive components to assist in driving the fountain to move on the water surface, achieving good coordination between the various components and further optimizing the overall performance of the fountain.

To provide a power supply device capable of supplying power generated from natural energy to a power-supply target more stably.SOLUTION: A power supply device 1 includes switching means M1 that can switch between: one state in which generated power generated by a natural energy power generation device, which generates power by converting natural energy into electrical power, is charged to a first storage battery 40 while a second discharge power discharged from a second storage battery 50 is output to an output unit 90; and another state in which the generated power is charged to the second storage battery 50 while a discharge power discharged from the first storage battery 40 is output to the output unit 90.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of medical auxiliary instruments, and discloses a portable knee osteoarthritis rehabilitation physiotherapy instrument which comprises a main body, a physiotherapy pad is arranged on the inner side surface of the main body, an upper fixing pad is fixedly arranged on the right end face of the main body, a first hook-and-loop fastener is fixedly arranged on the outer surface of the upper fixing pad, and a second hook-and-loop fastener is fixedly arranged on the outer surface of the first hook-and-loop fastener. Through the arrangement of the storage battery, the device can have the function of storing electricity, the device is light and small, the device can be carried out, the practicability of the device is further improved, the controller can control on-off of current according to the temperature or time set by a user, and therefore heating control is achieved. The controller is provided with a temperature sensor and monitors the temperature of the physiotherapy pad in real time, when the temperature reaches a set value, the control circuit can automatically cut off current to prevent overheating, on the contrary, if the temperature is lower than the set value, the control circuit can recover current on-off, and therefore the effect of continuous heating of the electric heating wire is achieved.