1203 results about "External energy" patented technology

The invention discloses an energy planning method for a low-carbon economic comprehensive energy system based on multi-agent deep reinforcement learning. The method comprises the following steps: constructing a comprehensive energy system structure including multiple energy forms such as wind power, photovoltaic, electricity-to-gas, combined heat and power generation, energy storage and the like; establishing a carbon emission intensity model of each subsystem based on an energy input and output relationship, and constructing a segmented carbon tax function to quantify the carbon cost; a double-layer two-stage Nash optimization model is designed, and the game relationship between collaboration between subsystems and external energy interaction is considered; the optimization problem is converted into a Markov decision process, and a state, an action and a reward function are defined; a multi-agent TD3 algorithm model is constructed and trained, and strategy stability and robustness are improved through a differential evolution mechanism; and deploying the trained strategy model in an actual system to realize self-adaptive energy planning and scheduling for the carbon economic target. The method has the characteristics of high adaptability, high carbon benefit and excellent intelligent cooperation capability.

The invention discloses a novel modularized whole-body carrying system which comprises a trunk module and a lower limb module, the trunk module is used for supporting a trunk and comprises a plurality of rigid elements and elastic elements which are connected with one another, and the lower limb module is connected with the trunk module and comprises a plurality of rigid elements which are connected with one another and elastic elements with trend directions. The lower limbs are supported. According to the novel modularized whole-body carrying system, adaptive design is carried out on the multiple modules according to all characteristics in human body movement, modularized design is adopted, and rapid disassembly, installation and replacement can be achieved; the combination and matching can be realized as required to realize force transmission and load reduction, and the upper body can adapt to different movement actions, so that different tasks can be completed by combining and matching different accessories according to different carrying requirements, the structure is simple, external energy and control are not needed, and the device can adapt to complex and severe environments. And the energy storage structure is used for assisting the whole machine structure in force transmission and component, so that the assisting effect and stability are improved.

The invention provides an impedance scanning device based on network side voltage dynamic compensation under a three-phase voltage imbalance working condition, and relates to the technical field of new energy station power electronic converter topology and control, the device comprises a three-phase rectifier, a direct current bus capacitor, an inverter, a voltage compensation device, a frequency sweeping device, a circuit breaker and a series transformer part, the three-phase rectifier is connected in series with inverters of the voltage compensation device and the frequency sweep device, a secondary side of a series transformer of the voltage compensation device is connected in series with a network side, a secondary side of a series transformer of the frequency sweep device is connected in series with a grid-connected point, and a primary side of the series transformer is connected to the inverters and is coupled to a secondary side of the series transformer; according to the device, the power grid side voltage is rectified through the voltage compensation unit and is compensated to the grid side after being subjected to single-stage inversion transformation, voltage compensation is achieved through the energy of a power grid when the voltage is unbalanced, and an external energy source or an interference source does not need to be introduced. After compensation, the accuracy of the frequency sweeping result is obviously improved.

The invention discloses a comprehensive energy low-carbon optimization scheduling method and system based on a master-slave game. The method comprises the following steps: constructing a hydrogen-containing comprehensive energy system model, and inputting data of an external energy supply side, energy conversion and energy storage equipment and a load side to obtain initialized system operation parameters; building a user side model based on the model, generating an initial electricity / heat load demand, calculating a user alternative energy consumption rate and dynamically adjusting an electricity / heat energy conversion ratio in combination with a price difference of real-time electricity and heat prices and user energy consumption behavior characteristics, and forming a new electricity / heat load distribution scheme; the integrated energy operator generates an electricity / heat price signal and formulates a dual excitation strategy, the user aggregator adjusts the user energy load and response strategy according to the signal and the strategy and feeds back the strategy to the integrated energy operator, and the user aggregator and the integrated energy operator adjust bidirectional feedback iteration to solve Stackelberg balance through the electricity / heat price signal and the load to obtain an optimal scheduling scheme. According to the invention, economic low-carbon operation and benefit win-win between subjects can be realized.

A modular electric wheel assembly. The assembly including a motor with a rotor in a rotary union with a stator. The motor of the brushless DC type and including a circular rotor rotating about a central axis and including a central hollow axle. The hollow axle configured for coupling with a removable energy source and / or an external energy source and including attachment structures for a plurality of attachments to enable riding by a user or configuration within a parent vehicle such as a bicycle or moped, or use as another machine type, such as a power tool or power generation machine. The rotor configured with a quick-change mechanism through a first ring configured to accept a plurality of removable wheel types and rotatable attachments, enabling a user to select a variety of unique wheel / tire types and configurations for a variety of applications.

The invention discloses a portable martial arts action correcting device, and relates to the field of sports equipment, the portable martial arts action correcting device comprises a first binding piece and a second binding piece, the first binding piece and the second binding piece are respectively fixed on the arm and the forearm of a user, the portable martial arts action correcting device further comprises a pull rope, a fixing shell, a winding piece, a limiting assembly and a transmission mechanism, the winding piece is rotationally installed in the fixing shell, and a coil spring is arranged between the winding piece and the fixing shell. According to the portable martial arts motion correcting device, the device is fixed to the arm and the forearm of a user through the first binding piece and the second binding piece, the pull rope and the winding mechanism are integrated in the fixing shell, real-time motion monitoring without external energy dependence is achieved, the transmission mechanism drives the first limiting piece to make contact with the second limiting piece, and motion correcting is achieved. And when the elbow joint is close to a set threshold value, the friction resistance is increased, clear tactile feedback is provided, impact caused by rigid braking is avoided, and a soft constraint protection mechanism is formed.

The invention belongs to the technical field of carbon emission trajectory evaluation and optimization, and discloses a carbon emission trajectory evaluation and optimization method and system based on ARIMA and GA-BP. The two evaluation models are an energy internet carbon emission trajectory evaluation model based on an extended incidence matrix and a whole-process carbon emission trajectory evaluation model based on a comprehensive energy system in the high-carbon emission industry. And an energy internet node carbon emission intensity prediction model based on ARIMA and GA-BP is provided, the model reveals influence factors of node carbon emission intensity, and the carbon emission intensity is accurately predicted. By taking minimization of the whole-process carbon emission trajectory of the high-carbon emission industry as an optimization target and combining the energy consumption characteristics of the flexible load of the high-carbon emission industry, a high-carbon emission industry comprehensive energy system optimization model based on low-carbon demand response is proposed, and response can be made according to the operation state of an external energy internet; and the carbon emission track is minimized by using the flexibility brought by multi-energy complementation, so that deep emission reduction is realized.

The invention belongs to the technical field of humidity control, and particularly relates to a humidity adjusting material and a preparation method thereof. According to the invention, water provides a dispersion and moisture absorption basic environment for other components, the moisture absorbent and the binder are dissolved in water and then interact with each other to form a system with certain viscosity and moisture absorption capability, and the strong moisture absorption characteristic of the moisture absorbent is combined with the auxiliary moisture absorption and binding effects of the binder, so that the moisture absorption capability of the adjusting material is enhanced. The high water absorption of the water-absorbent resin is cooperated with a system formed by the moisture absorbent and the binder, so that the moisture absorption capacity of the adjusting material is greatly improved, and a formed gel structure is beneficial to stabilizing moisture and realizing the long-term effect of humidity adjustment. The humidity adjusting material provided by the invention can automatically perform moisture absorption or moisture release operation according to the environment humidity without external energy supply, effectively adjusts the environment humidity, and has the advantages of large moisture absorption capacity and high moisture absorption speed.

The invention discloses a luminescent material composition, ink, a luminescent device, a display panel and a display device. The luminescent material composition comprises a first host material and a second host material, and the second host material is configured to be capable of forming an exciplex under the action of external energy. The luminescent material composition provided by the invention can meet the requirements of products with high comprehensive performance.

The invention provides a multistage coupling chemical looping hydrogen production device. The multistage coupling chemical looping hydrogen production device comprises a first-section reducer, a water vapor oxidation hydrogen production device, a second-section reducer, a methane converter and an air oxidizer, identical first oxygen carriers are arranged in the first-section reducer and the water vapor oxidation hydrogen production device, and identical second oxygen carriers are arranged in the second-section reducer, the methane converter and the air oxidizer; the methane converter is connected with the first-section reducer and is used for conveying synthesis gas after methane conversion to the first-section reducer; the second-section reducer is connected with the methane converter and is used for refluxing carbon dioxide or water vapor or both to the methane converter; the first-section reducer is connected with the second-section reducer and is used for conveying reduction tail gas containing carbon monoxide or hydrogen or the carbon monoxide and the hydrogen to the second-section reducer. Therefore, the invention provides the multistage coupling chemical looping hydrogen production device and method which can realize energy self-sustaining and do not need external energy input.

The invention discloses a deoxidizer for metal smelting and a preparation process thereof, and belongs to the technical field of steel for high-strength fasteners, and the deoxidizer comprises aluminum powder, silicon powder, titanium powder, zirconium powder and carbon-coated lanthanum nano powder in a mass ratio of (45-50): (20-25): (15-20): (8-12): (0.2-0.4). In a sol crystallization stage, lanthanum nitrate and a composite ligand form a directionally growing metal organic framework under the assistance of an external field, and a regular pore structure of the metal organic framework provides a nano-scale template for subsequent carbon coating, so that the decomposed organic ligand is gradually carbonized in a segmented heating process and forms a gradient structure; the low-temperature section promotes the carbon layer to be converted from an amorphous state to an ordered state so as to enhance the electron conduction capability, and the high-temperature section forms a through mesoporous network through external energy etching, so that excessive agglomeration of lanthanum nanoparticles is limited, and a controllable release channel is constructed. The preheating and pre-pressurizing process provides support for the nanostructure on the macroscopic scale, and the aluminum powder is softened through low-temperature plastic deformation to fill gaps of the titanium-zirconium powder, so that a compact initial blank structure is formed.

The invention discloses an n + 1 power supply intelligent control circuit and a fault isolation and energy saving system thereof. The n + 1 power supply intelligent control circuit comprises n main power supply modules, a redundant power supply module, a dynamic energy pool unit, a self-healing isolation unit, an energy efficiency optimization unit and a central control unit, the dynamic energy pool unit is respectively connected with the n main power supply modules, the redundant power supply module and the external energy unit, and is used for integrating the output power of each power supply module to form an adjustable power pool, collecting the power state, health parameters and energy efficiency data of each module in real time and feeding back the power state, health parameters and energy efficiency data to the central control unit; and the output proportions of the modules are dynamically distributed based on instructions of the central control unit. According to the invention, the power supply reliability and fault-tolerant capability are improved, the on-load isolation of the fault module and the rapid reconstruction of the power supply path are realized through the cross connection topology and the pre-isolation mechanism of the matrix type solid-state switch network, and the power supply interruption or large voltage fluctuation caused by the traditional passive isolation is avoided.

The utility model relates to the technical field of metallurgical energy conservation, in particular to a power generation device for preheating by using submerged arc furnace gas power generation tail gas as a heat source, which comprises a submerged arc furnace, a submerged arc furnace gas recovery processing device, a gas generator set, a denitration and desulfurization device and a preheating device, the submerged arc furnace gas recovery processing device is connected with the submerged arc furnace and the gas generator set and used for purifying gas generated by the submerged arc furnace and then sending the purified gas to the gas generator set for power generation, and the denitration and desulfurization device is connected with a tail gas exhaust port of the gas generator set and used for conducting denitration and desulfurization treatment on tail gas generated after power generation. The denitration and desulfurization device is connected with the preheating device and used for feeding tail gas subjected to denitration and desulfurization into the preheating device to preheat materials, and the preheating device is connected with the submerged arc furnace and used for feeding the preheated materials into the submerged arc furnace for smelting, so that energy waste caused by direct emission of high-temperature tail gas generated after power generation is avoided; and the demand on external energy in the preheating process is also reduced.

The utility model discloses energy-saving steel pipe annealing equipment which comprises a rack, a preheating mechanism, a quenching mechanism and a feeding mechanism are arranged on the rack, a feeding chute is arranged on one side of the preheating mechanism, and the feeding chute is communicated with the preheating mechanism; intermediate frequency equipment is arranged in the rack and connected with the quenching mechanism, a discharging slide way and a feeding slide way are arranged in a heat shielding cover of the preheating mechanism from bottom to top, heat emitted by the quenched steel pipe is used for preheating the steel pipe to be quenched, and therefore the energy utilization efficiency is improved; external energy input required during quenching is also reduced; the heat shield enables heat emitted in the cooling process of the steel pipe to fully preheat the steel pipe to be quenched, the utilization rate of the heat is improved, the preheating effect is further enhanced through the feeding slide way and the discharging slide way which are composed of the supporting rods and the fixing rings, and the whole quenching process is more efficient.

The invention provides a bridge self-adaptive multi-dimensional vibration reduction support device and a working method, relates to the field of bridges, and aims to solve the technical problems that an existing bridge vibration reduction device is difficult to consider multi-dimensional vibration control and adjustment depends on an external power supply. Vibration mechanical energy is converted into magnetic field energy to act on magnetorheological fluid, a self-adaptive vertical damping adjusting mechanism which does not need external energy and has stronger vibration and larger damping is constructed, and rolling friction energy consumption of friction balls in the transverse vibration reduction assembly and displacement constraint of a limiting ring are combined, so that the vibration reduction effect is improved. The multi-dimensional control over the vertical direction, the horizontal direction and the torsion is achieved through the combined deformation energy dissipation of a vibration reduction spring and a limiting cable in the torsion vibration reduction assembly, the problems that a traditional bridge vibration reduction support is single in function, cannot be adjusted in a self-adaptive mode and fails in power failure are effectively solved, and the anti-vibration safety and the operation stability of the structure in the complex power environment are improved.

The invention relates to an oil-rich coal in-situ underground combustion and pyrolysis oil and gas recovery cooperative system based on high-temperature heat pipes. The system comprises a vertical shaft, a horizontal drill hole and a high-temperature heat pipe set. A high-temperature heat pipe set is arranged on the coal seam of the vertical shaft. A plurality of vertical wells are arranged with the vertical well as the center. Each vertical well is communicated with two parallel horizontal drill holes with different depths in the coal seam, the horizontal drill holes communicated with the adjacent vertical wells are not at the same depth of the coal seam, and four horizontal drill hole groups with different depths are arranged in the coal seam. Oxygen and carbon dioxide are mixed into oxygen-enriched gas, and combustion of coal in a certain horizontal drill hole is achieved. Flue gas generated by coal combustion is subjected to heat exchange through the high-temperature heat pipe set, and water vapor or carbon dioxide is heated. The high-temperature water vapor or carbon dioxide and the high-temperature flue gas after heat exchange enter the other two horizontal drill holes in the coal seam respectively, coal is pyrolyzed, and pyrolysis gas and tar are generated. According to the system, high-quality tar and high-calorific-value pyrolysis gas can be obtained, and only a small amount of energy needs to be provided from the outside.

A method for managing an energy system having one or more renewable energy sources, one or more energy storage devices, one or more loads, and a grid connection for connecting at least temporarily to an external energy distribution grid is disclosed. The method generates a prediction of energy demand of the loads using historical energy demand data, and a prediction of renewable energy availability from the renewable energy sources using weather forecast data. An amount of energy to be obtained from the distribution grid is determined in dependence on the prediction of renewable energy availability and the prediction of energy demand. An energy conservation strategy is generated using the predictions and determined energy amount, and energy supplied to one or more of the energy storage devices and / or one or more of the loads is adjusted automatically according to the energy conservation strategy.

The invention discloses a new energy automobile electric compressor preheating structure and a control method, and relates to the technical field of new energy automobile heat management. The method comprises the three steps of heat source collaborative recovery, heat demand dynamic distribution and self-starting collaborative execution, specifically, motor stator waste heat and compression refrigerant waste heat are recovered through a heat conduction fin array and a spiral flow channel, and a shared heat conduction medium is guided in; based on a fuzzy PID controller, a heat flow guide valve is dynamically adjusted to distribute heat flow according to the lubricating oil way temperature, the suction superheat degree and the shell temperature; the generator is triggered to be rapidly heated in a locked-rotor mode at the ultralow temperature, the preheating requirement is pre-judged in combination with a heat attenuation model, the structure comprises a temperature sensor set, a three-way heat flow guide valve and an embedded MCU processor, efficient waste heat utilization is achieved, external energy consumption is not needed, preheating energy consumption is effectively reduced, and the low-temperature starting performance and operation stability of the compressor are remarkably improved.

This invention discloses a Fe-GC@Fe 0 This invention relates to catalysts, their preparation methods, and applications, belonging to the field of water treatment technology. The preparation method of this invention is simple, requires minimal equipment, and yields Fe-GC@Fe catalysts. 0 The catalyst can drive microorganisms in water to metabolize perfluorinated compounds. Under conditions without external energy input, it can effectively remove perfluorinated compounds such as perfluorooctanoic acid, perfluorooctane sulfonic acid, perfluorononanoic acid, and perfluorohexane sulfonic acid from water. The removal rate and defluorination rate both reach more than 80%. Moreover, it is a solid catalyst, which is easy to separate from water, recycle and reuse, and maintain a high removal effect.

The invention relates to the field of preparation of lubricating materials, in particular to a preparation method of composite phase change lubricating gel based on temperature-friction force synergistic response. The lubricating gel adopts a sandwich layered structure; the bottom layer is a porous ceramic layer formed by micro-arc oxidation, is filled with a disulfide bond dynamic network polymer and is anchored on a metal substrate; the middle layer comprises a microencapsulated phase change material which is dispersed in a polyurethane network containing dynamic disulfide bonds and is wetted with ionic liquid; the surface layer is an epoxy resin coating rich in boron nitride nanosheets, and a rapid heat conduction channel is constructed. Compared with the prior art, the lubricating state can be automatically adjusted in the friction process without external energy input, and the method has the advantages of being sensitive in multi-field coupling response, capable of achieving automatic antifriction protection, high in extreme working condition adaptability and the like.

The invention relates to the technical field of agricultural planting, and discloses an energy-saving off-grid container planting warehouse which comprises a container, a sealing plate is fixedly connected to the right side of the container, an equipment box is fixedly connected to the right side of the sealing plate, and a sunlight collector is fixedly connected to the top of the equipment box. A photovoltaic panel and a fan are fixedly connected to the rear side of the top of the container, optical fiber pipelines are fixedly connected to the right side of the inner wall of the container and the left side of a sealing plate, and two optical fiber pipeline light source releasers are fixedly connected with a sunlight collector light source releaser. The bottom of the inner wall of the container is provided with vertical rotating three-dimensional planting frames which are evenly distributed. Natural lighting is achieved through the light-transmitting heat-insulating glass, meanwhile, natural light is fully utilized through the sunlight collector, the requirement for artificial lighting is reduced, photovoltaic panel and draught fan power supply is reduced, energy consumption and electricity cost are reduced, dependence on external energy is reduced, and the problem that energy consumption of artificial lighting is high in the container planting process is solved; therefore, the cost of container planting is reduced.

The invention relates to a transportation junction multi-business micro-energy network chain-type interconnection architecture, and the architecture comprises a load layer which comprises micro-energy networks of different business forms; the energy layer comprises an external energy source and a distributed power generation and energy storage system and is used for providing comprehensive energy supply for energy consumption requirements of the micro-energy grids in different commercial forms in the load layer; the energy network layer comprises different types of energy networks, the different types of energy networks carry out coupling conversion on energy of the energy layer so as to meet the energy use requirements of micro energy networks in different business states in the load layer, and coupling interaction and interconnection intercommunication between the different types of energy networks are achieved through different types of energy conversion equipment; and the cloud edge-end energy collaborative management and control system is used for regulating and controlling the energy layer, the energy network layer and the load layer by utilizing a cloud-edge-end three-layer management and control architecture so as to realize the collaboration and dynamic balance of multiple energy flows among different regions of the transportation hub.

The invention relates to the technical field of power transmission line self-energy-taking, and discloses a power transmission line self-energy-taking device and a state detection system, and the device comprises a housing structure, a motion structure, an electromagnetic power generation structure, and a friction power generation structure. Wherein the moving structure is composed of a permanent magnet, a spring and a fixing groove, the vertical shell and the fixing groove are connected through the spring, and a spring mass vibration system is constructed; the electromagnetic power generation structure generates power through relative movement of a permanent magnet and a coil. The friction power generation structure generates power through sliding separation of sliding electrodes on the side faces of the fixing grooves and electrodes in the side shells. The invention further discloses a state detection system, vibration energy is collected through the device and stored in an energy storage battery through an energy management circuit to supply power to a sensor detection circuit, and data are sent to an upper computer through a wireless transmission module. The power transmission line state real-time detection without external energy supply can be realized, and the problem of power supply of monitoring equipment in remote areas is solved.

The self-extinguishing battery pack comprises a battery pack body and a fire extinguishing system, the battery pack body is of a multi-layer structure, a sensor, a control panel and a power-off structure are arranged in the battery pack body, and the fire extinguishing system is arranged outside the battery pack body. The fire extinguishing system has a multi-trigger mechanism and a double-cooperative fire extinguishing mechanism so as to extinguish the power supply in time when the power supply burns. The battery pack is separated by adopting a multi-layer structure, and an abnormal heating layer is accurately positioned by combining temperature and smoke sensors; the layered structure isolates the fire behavior, optimizes the space and improves the energy density; a water-based and aerosol dual fire extinguishing mechanism is adopted, aerosol is firstly released to inhibit reaction, and then the water-based is cooled to cope with thermal runaway cooperatively; the hot melting ball automatically switches pressure, and external energy is not needed; three trigger mechanisms are integrated to form a protection system, so that the emergency capability is enhanced, and the reliability at extreme high temperature is ensured; the circuit is automatically cut off to prevent diffusion when abnormity occurs; the separated design avoids interference, and the metal spring realizes power-off protection; the monitoring fault tolerance is improved through multiple sensors, and the fire extinguishing time sequence is guaranteed through pressure difference.

The invention belongs to the field of flexible sensors, and particularly relates to a flexible sensor prepared from a self-powered piezoelectric nanofiber membrane, and in addition, the prepared sensor also has a human physiological signal acquisition function. The sensor is composed of silicone rubber (Ecoflex 00-30), a polyvinylidene fluoride (PVDF) nanofiber membrane and a copper electrode. As the polyvinylidene fluoride nanofiber membrane prepared by the electrostatic spinning technology is nanoscale, certain surface roughness can be increased when the polyvinylidene fluoride nanofiber membrane is attached to the surface of the silicone rubber, the output performance of the sensor is improved, and meanwhile, due to the hydrophobic property of the polyvinylidene fluoride nanofiber membrane, the sensor can be used for detecting the surface roughness of the silicon rubber. When external energy is collected, the friction loss between a solid friction surface and external liquid is greatly reduced, so that the service life of the sensor is prolonged; finally, by testing the sensor, it is found that the sensor has huge potential in the application field of external energy collection and human physiological signal collection.

The present disclosure provides a method for recovering metal from metal-containing waste material by leaching, the method comprising providing aqueous solution (14), providing leaching agent precursor, providing a source of external energy (10), treating the aqueous solution (14) with the external energy (10) to form reactive species, reacting the leaching agent precursor with the reactive species to form a leaching agent and to obtain a leaching solution, providing metal-containing material, reacting the metal-containing material with the leaching solution to obtain soluble metal complexes, and recovering the metal complexes. The present disclosure also provides a device for recovering metal by leaching.

The invention relates to the technical field of hydroelectric generation, and provides a low-energy-consumption water circulation power generation device which comprises a water circulation power generation device body, the water circulation power generation device body comprises a water circulation assembly and a power generation assembly, the water circulation assembly is used for making water flow circularly flow, and the power generation assembly is used for generating power through the circulating water flow; the water circulation assembly comprises an energy storage water tank, a high-level water tank and a plurality of groups of water return parts; each group of water return part comprises a water turbine pump, a tail water tank, a hydraulic ram, a high-pressure tank and a water lifting tank; water flow flowing out of the high-position water tank can completely flow back to the high-position water tank through acting of the water turbine pump, the water lifting tank and the water suction pump, and water circulation operation is completed; due to the fact that only the water suction pump is needed for water lifting, external energy is not needed for driving, energy consumption needed by water circulation is extremely low, the water flow generator can generate electricity in the water circulation process to be used by the water turbine pump, and energy consumption is further reduced.

The invention relates to the technical field of new energy battery systems, in particular to an immersed battery cooling structure with waste heat recovery and a waste heat recovery method.The immersed battery cooling structure comprises a cooling box, and a battery module is immersed in cooling liquid in the cooling box; a waste heat recovery mechanism is arranged above the cooling box, and the waste heat recovery mechanism exchanges heat with the cooling liquid; the cooling box comprises a box body for mounting the battery module, a zigzag cooling flow channel is arranged in the box body, and cooling liquid flows along the cooling flow channel and exchanges heat with the battery module; the cooling box comprises a box cover arranged at the top end of a box body in a sealed mode, a plurality of cooling pipes arranged side by side are arranged on the box body, and the cooling pipes and the waste heat recovery mechanism are arranged in a heat exchange mode. And the cooling liquid transfers heat generated by the battery module to the cooling pipe, and the heat is recovered through the waste heat recovery mechanism. The immersion cooling mode is adopted to improve the cooling effect, meanwhile, waste heat is effectively recycled and utilized, heat waste is reduced, and external energy input needed by operation of the battery module is reduced.

The invention provides a permanent magnet radial-axial collaborative balancing device and method for a shield pump, and belongs to the technical field of shield pumps. The device comprises a pump shell, an impeller, a rotor assembly, a stator assembly, a shaft, a thrust bearing, a rotor permanent magnet component and a static permanent magnet component, the rotor permanent magnet component and the static permanent magnet component correspond to each other, the rotor permanent magnet component is embedded below an impeller front cover plate opening ring, and the static permanent magnet component is embedded into the corresponding inner wall of the pump shell. The magnetization direction and the axis of the pump shaft form a preset inclination angle and are in mirror symmetry, so that a repulsive magnetic circuit with opposite same-name magnetic poles is formed; space magnetic force generated during working can be decomposed into radial and axial components. The radial component provides restoring force pointing to the center when the rotor deviates, and the radial stability is enhanced. The axial component counteracts the axial thrust of the fluid, and the thrust bearing load is reduced. External energy input is not needed, the structure is compact, vibration noise can be effectively restrained, and the service life of the bearing is prolonged.

A flexible DC converter comprises a MMC and a DCPFC embedded within the flexible DC converter. The flexible DC converter features modularity and a flexible number of ports, enabling bidirectional control of DC power flow of two or more lines, addressing the issue of insufficient degrees of freedom in DC power flow control in meshed DC systems. The DCPFC is directly embedded in the flexible DC converter, allowing for energy balance without the need for external power sources and high-voltage isolation devices, with a wide range of power flow regulation. The control method can manage both internal and external energy balance of the device. Additionally, a main circuit parameter designing method can serve as a basis for selecting circuit components for the device. A fault protection strategy and an active fault current suppression method can enhance the reliability of the device under complex extreme conditions.