83results about How to "Improve energy storage efficiency" patented technology

The invention provides BCZT-BNT-based lead-free composite energy storage ceramic with high breakdown strength and a preparation method of the BCZT-BNT-based lead-free composite energy storage ceramic, and belongs to the field of dielectric energy storage ceramic materials. The general formula of the chemical composition is (1-x) [0.25 (Bi < 0.5 > Na < 0.5 >) TiO < 3 >-0.75 Ba < 0.85 > Ca < 0.15 > Zr < 0.1 > Ti < 0.9 > O < 3 >]-xBaZrO < 3 >, and x is the mole number and ranges from 0.05 to 0.20. According to the preparation method disclosed by the invention, chemical component disorder is induced by doping modification on an atomic scale, and a high-dynamic-polarity nano micro-region (PNRs) is formed, so that the nano micro-region has an obvious dielectric relaxation behavior and a slender ferroelectric hysteresis loop (P-E ring), and the energy storage ceramic material with high energy storage density and energy storage efficiency, ultrahigh breakdown strength and excellent frequency stability is obtained.

The invention relates to an open type carbon dioxide energy storage system and a carbon dioxide energy storage method. The open type carbon dioxide energy storage system comprises a gas compression device, a first expansion unit, a gas-liquid separation tank, a main cooler, a circulating compressor unit, a liquid storage tank, a regenerator and an energy release device. An inlet of the gas compression device is used for being communicated with an air discharging outlet of a coal chemical device, and an outlet of the gas compression device is communicated with an inlet of the first expansion unit and a hot side inlet of the main cooler. A hot side outlet of the main cooler is communicated with an inlet of the liquid storage tank; an outlet of the first expansion unit communicates with an inlet of the gas-liquid separation tank, and a gas outlet of the gas-liquid separation tank communicates with a cold side inlet of the main cooler. A cold side outlet of the main cooler communicates with an inlet of the circulating compressor unit, and an outlet of the circulating compressor unit communicates with an inlet of the gas compression device. The system and the method disclosed by the invention have relatively high energy storage efficiency and energy utilization rate.

The invention discloses a lead-free energy storage ceramic laminated material, and belongs to the technical field of dielectric energy storage. The lead-free energy storage ceramic laminated material is formed by sequentially laminating lead-free energy storage ceramic with a texture structure and lead-free energy storage ceramic with a non-texture structure, and preferably, the material comprises at least three layers; when the lead-free energy storage ceramic with the texture structure is positioned on the middle layer, the lead-free energy storage ceramic with the non-texture structure is positioned on the two sides of the middle layer; when the lead-free energy storage ceramic with the non-texture structure is located on the middle layer, the lead-free energy storage ceramic with the texture structure is located on the two sides of the middle layer. Based on the structural design of at least three layers, the non-textured ceramic is selected as the high-voltage-resistant layer, the textured ceramic is selected as the high-polarization layer, the lead-free ceramic laminated material with excellent energy storage performance is obtained, and the lead-free ceramic laminated material has wide application prospects in the fields of power electronics and pulse power.

The invention relates to the technical field of energy storage, and discloses a constant-pressure compressed air energy storage device and an energy storage system.The constant-pressure compressed air energy storage device is characterized in that an energy storage library is divided into a first closed cavity and a second closed cavity by a flexible air bag; first fluid is stored in the second closed cavity; the interior of the flexible air bag is communicated with the second closed cavity; during energy storage, compressed air enters the first closed cavity, the flexible air bag is compressed, the size of the first closed cavity is increased, the first fluid in the second closed cavity is compressed and liquefied, and temperature rise and pressure rise of the compressed air are relieved; during energy release, the first fluid is heated, the first fluid absorbs heat to be gasified and transfers heat to the compressed air, the flexible air bag expands, the size of the first closed cavity becomes small, and air is exhausted. During energy storage, gas storage is approximate to constant pressure, temperature and pressure increase of the first closed cavity is slowed down, more air is stored, and power consumption is reduced; and during energy release, temperature and pressure reduction is relieved, approximate constant pressure is achieved, and output air energy is increased.

The invention discloses an underground artificial tunnel energy storage cavern flexible sealing layer which is formed by lap joint of a plurality of flexible sealing units, and each flexible sealing unit comprises a high-elasticity rubber body layer, an HDPE stereoscopic film and a high-strength filament net; the high-strength filament net is attached to the inner side face of the HDPE three-dimensional film, then the high-elasticity rubber body is sprayed to achieve composite connection, the ends of the anchoring parts are arranged in a protruding mode and poured together with concrete, and tight connection and attachment of the HDPE three-dimensional film, the high-strength filament net and the high-elasticity rubber body and the reinforced concrete lining are achieved; the sealing performance and the pressure resistance of the energy storage cavern of the artificial tunnel are improved; the flexible sealing layer forms a full-wrapping complete HDPE three-dimensional anti-leakage system, potential leakage of an internal energy storage medium passing through the energy storage cavern structure is comprehensively blocked, local defects such as the leakage risk of cracks caused by deformation of the energy storage cavern are greatly reduced, the sealing performance of the structure can be guaranteed to the maximum extent, the service life of the energy storage cavern is greatly prolonged, and the energy storage cavern is suitable for large-scale popularization and application. And the energy storage efficiency of the cavern is improved.

The invention relates to a low-heat-conduction high-strength phase change energy storage wallboard and a preparation method and application thereof.The phase change energy storage wallboard comprises a wallboard base material D and a phase change material, the wallboard base material D is a cement-based material with a directional communication pore channel structure, and the phase change material is loaded in the directional communication pore channel structure. The preparation method comprises the following steps: preparing a wallboard base material D with a directional communicated pore channel structure through a freeze casting method; loading the phase change material into the wallboard base material D through a vacuum impregnation method to obtain a wallboard base material E; the wallboard base material E is put into a temperature control curing room to be cured for 1-2 days, and the low-heat-conduction and high-strength phase change energy storage wallboard is prepared. Compared with the prior art, the contradictory requirement between the heat conductivity and the strength of the wallboard is met, the vertical bearing capacity of the wallboard is greatly improved, and the heat conductivity coefficient of the wallboard is remarkably reduced. The phase change energy storage wallboard has extremely high mechanical properties and flexible and efficient temperature regulation and control effects.

The invention relates to the technical field of dielectric energy storage device materials, in particular to high-entropy designed bismuth ferrite-based energy storage ceramic as well as a preparation method and application thereof, the chemical composition formula of the material is (0.7-x) Bi < 0.9 > (Sm < 0.5 > Gd < 0.5 >) < 0.1 > FeO < 3-0.3 > (Sr < 0.5 > Ba < 0.5 >) TiO < 3-x > NaNbO < 3-y > MnO < 2 >, the value range of x is 0-0.15, and the value range of y is 0-0.005. The relaxation ferroelectric material is designed by adopting a high-entropy strategy, and various elements occupy the same site of the material to generate lattice distortion, so that the relaxation characteristic of bismuth ferrite-based ceramic is promoted, and a ferroelectric hysteresis loop is optimized. The NaNbO3 anti-ferroelectric material is introduced, the long-range ferroelectric order is destroyed, the local random field is enhanced, and a low Pr value can be obtained. And in addition, the concentration of oxygen vacancies can be reduced by properly adding 0.5% mol of MnO2, so that the leakage current of the material is reduced, the energy storage efficiency is improved, and the material design not only enriches the application field of the high-entropy ceramic, but also provides a new thought for improving the performance of the energy storage ceramic.

The invention provides a thermal insulation material and a battery pack. The thermal insulation material comprises cellulose aerogel and an organic phase change material dispersed in the cellulose aerogel; wherein the cellulose aerogel is obtained by reacting bacterial cellulose with a cross-linking agent. According to the thermal insulation material provided by the invention, the cross-linking agent is used for modifying the bacterial cellulose aerogel, the pore diameter of the cellulose aerogel is greatly improved, the cellulose aerogel is used as a supporting material of an organic phase change material, the thermal insulation material with ultrahigh energy storage efficiency is prepared, and the thermal insulation material can be applied between battery cells when the heat generated by a monomer battery cell is too high. Heat is effectively absorbed, and heat spreading of the battery cells caused by direct heat conduction between the battery cells between the modules is prevented.

The invention provides a PbZrO3 antiferroelectric capacitor and a preparation method thereof, and relates to the technical field of ferroelectric materials, the PbZrO3 antiferroelectric capacitor comprises a first electrode layer, a PbO layer, a solid solution ferroelectric antiferroelectric layer, a LaNiO3 layer and the like, and phases in the solid solution ferroelectric antiferroelectric layer comprise PbZrO3, a ferroelectric and an Ag-containing Au phase. The invention also provides a preparation method of the capacitor, and the method comprises the following steps: depositing a LaNiO3 precursor solution on a single crystal substrate, and carrying out the crystallization; mixing the PbZrO3 precursor solution with the ferroelectric precursor solution, and then adding Au nanoparticles containing Ag; the LaNiO3 layer is coated with the mixed solution, and crystallization is carried out; depositing the PbO precursor solution on the surface of the antiferroelectric layer of the solid solution ferroelectric, and crystallizing; and carrying out gold electrode deposition to obtain the PbZrO3 antiferroelectric capacitor. The capacitor is high in energy storage efficiency and high in dielectric constant.

The embodiment of the invention provides an offshore wind power high-pressure compressed air energy storage system and a working method thereof.The offshore wind power high-pressure compressed air energy storage system comprises a high-pressure compression subsystem and an expansion subsystem which are connected with a pressure container and a control unit, and the high-pressure compression subsystem, the pressure container and the expansion subsystem are arranged on an offshore booster station and / or an offshore wind turbine; the high-pressure compression subsystem is used for compressing air and storing the compressed air in a pressure container; the expansion subsystem is used for converting energy into electric energy and transmitting the electric energy to an onshore power grid; and the control unit is used for determining that the high-pressure compression subsystem is used for storing the electric energy or the expansion subsystem is used for releasing the electric energy according to the real-time electric power and the real-time output power of the offshore wind turbine. According to the system, offshore wind power is stored in the electricity consumption valley period and released and used in the electricity consumption peak period, and the output electric power quality can be improved; the energy density of compressed air is improved in a high-pressure compressed gas form; and the requirement for storage space is reduced, geographic factors and space limitation are avoided, and the engineering cost is reduced.

The utility model provides a temperature regulating system of a compressed air energy storage chamber, which comprises an artificial chamber horizontally arranged underground, a vertical shaft arranged at the top of the artificial chamber, an air circulating pipeline and a water pipeline, the air circulating pipeline and the water pipeline are arranged in the artificial chamber, and an air inlet and an air outlet at two ends of the air circulating pipeline are oppositely arranged along two sides of the artificial chamber respectively. An axial flow fan is arranged in an air inlet of the air circulating pipeline, the water pipeline comprises a water inlet pipeline and a water outlet pipeline, the water inlet pipeline is communicated with a water outlet of the warm water tank and an in-plant circulating cooling water inlet, the water outlet pipeline is communicated with a water inlet of the cold water tank and an in-plant circulating cooling water return port, and a spiral heat exchange pipe is arranged between the water inlet pipeline and the water outlet pipeline. The spiral heat exchange pipe is embedded in the air circulation pipeline behind the axial flow fan and used for exchanging heat with air in the chamber, adjusting the temperature of the air in the artificial chamber during inflation energy storage and deflation energy release, guaranteeing the structural safety of surrounding rock around the artificial chamber and prolonging the service life of sealing materials in the chamber.

The utility model discloses a mountain gravity energy storage system which comprises a water pumping system, a gravity conveying system and an energy storage assembly. The water pumping system comprises a first reservoir, a second reservoir and a first reversible unit. The first reservoir and the second reservoir are communicated through a first auxiliary pool, a connecting pipeline and a second auxiliary pool. The gravity conveying system comprises a conveying rail used for bearing a gravity block, a first storage bin and a second storage bin. The gravity conveying system further comprises a second reversible unit, the second reversible unit drives the gravity block to ascend in the driving mode, and the second reversible unit generates power through the descending potential energy of the gravity block in the power generation mode. By arranging the water pumping system and the gravity conveying system, in the electricity trough period, it is guaranteed that the mountain gravity energy storage system can fully utilize electric energy and conduct gravity energy storage; and in the peak period of power utilization, the first reversible unit and the second reversible unit are driven to generate power, so that the power supply requirement is met, and the stability and the energy storage efficiency of the mountain gravity energy storage system are guaranteed.

The invention relates to the photovoltaic field, and discloses a photovoltaic energy storage charging system, which comprises four groups of photovoltaic panels and an energy storage battery, the photovoltaic panels are arranged in each frame, U-shaped air pipes are arranged in the frames, the U-shaped air pipes are used for heat dissipation and dust removal, the U-shaped air pipes are driven by a first fan assembly, the frames are fixed with a protection assembly, and the energy storage battery is arranged in the protection assembly. And the protection assembly drives the frame to turn over, so that the photovoltaic panel turn-over surface is folded. According to the invention, through the arrangement of the protection assembly, when the wind power is too large and the photovoltaic panels are easy to damage, power is provided through external wind power, each photovoltaic panel is folded to avoid damage, the wind power is utilized, environmental protection and no pollution are realized, the energy consumption of equipment is reduced, and the photovoltaic panels are arranged in a staggered manner from top to bottom after being folded, so that the use space is saved, and the illumination area is increased; and the energy storage efficiency is improved.

The application provides an energy storage device, an energy storage module, an energy storage system, a charging network and a heat management method thereof. The energy storage device comprises an energy storage module, a heat exchange module, a heat dissipation module and a heat exchange pipeline assembly. The energy storage module comprises a plurality of battery devices. At least part of the heat exchange module is embedded in a ground source to exchange heat with the ground source. At least part of the heat dissipation module is exposed to an atmospheric source to exchange heat with the atmospheric source. The heat exchange pipeline assembly is used to circulate a heat exchange medium. The heat exchange pipeline assembly comprises a main heat exchange pipeline, a first bypass pipeline, a second bypass pipeline and a third bypass pipeline. The heat exchange module and the heat dissipation module can exchange heat with the battery devices. The energy storage device provided by the application has low operating power consumption, thereby effectively improving the energy storage efficiency of the energy storage device.

The utility model provides an energy storage system which comprises an energy storage tank group which comprises a plurality of energy storage tanks which are communicated in series, and part of the energy storage tanks are filled with spacer fluid; the air energy storage module can store and release energy by utilizing compression and expansion of air, and is connected with the energy storage tank group, so that compressed air pushes the spacer fluid to flow to the downstream in the first flowing direction when entering the energy storage tank group, and carbon dioxide in the energy storage tank located at the downstream of the spacer fluid is extruded; and the carbon dioxide energy storage module can store and release energy by utilizing phase change of carbon dioxide, and the carbon dioxide energy storage module is connected with the energy storage tank group, so that when the carbon dioxide enters the energy storage tank group, the carbon dioxide pushes the spacer fluid to flow towards the upstream in the downstream direction of the first flowing direction so as to extrude the compressed air in the energy storage tank located at the upstream of the spacer fluid. In this way, isolation of two working media, namely compressed air and carbon dioxide, is achieved in the energy storage stage and the energy release stage, and therefore the energy storage efficiency and the stability of the energy storage system are improved.

This invention relates to the field of flow battery technology, specifically disclosing a flexible graphite bipolar plate with high surface conductivity, its preparation method, and its application. The preparation method includes the following steps: (1) chemically and thermally treating flake graphite to obtain expanded graphite sheets; (2) spraying a PEDOT:PSS solution onto the first layer of expanded graphite sheets, then laying a second layer of expanded graphite sheets, and pre-pressing to obtain an EG-PEDOT:PSS composite material; (3) impregnating the EG-PEDOT:PSS composite material with an epoxy resin solution, and performing water bath curing and drying treatment to obtain a PEDOT:PSS-EG-EP composite material; (4) using a hot-pressing molding process to obtain a flexible graphite bipolar plate with high surface conductivity. This invention improves the overall conductivity of the graphite bipolar plate and enhances the energy storage efficiency of flow batteries.

The invention relates to a power grid frequency modulation and peak regulation method and device based on gravity energy storage, and a medium. The method comprises the following steps: training an ARIMA model and an LSTM model by using historical load data of a power grid and historical compensated electric energy; monitoring a load state of a power grid according to a real-time load monitoring module, and predicting electric energy needing to be compensated by using an ARIMA model and an LSTM model according to the load state; according to the electric energy which is predicted by the ARIMA model or the LSTM model and needs to be compensated and the multiple linear regression model, an environment correction coefficient is obtained, a control signal that the height of the heavy object needs to be adjusted is obtained, and according to the control signal and real-time feedback of the real-time load monitoring module, the electric lifting device is controlled to adjust the height of the heavy object; the weight is released, and potential energy generated in the weight falling process is converted into electric energy through an energy conversion device; and the generated electric energy is transmitted to the power grid through the power transmission device to realize peak regulation and frequency modulation of the power grid.

The invention discloses a polyimide dielectric film containing carboxyl betaine and a preparation method thereof. The carboxyl betaine-containing polyimide dielectric film is prepared from carboxyl betaine-containing polyimide, and the carboxyl betaine-containing polyimide is prepared by the following steps: firstly, taking a precursor of carboxyl betaine, m-phenylenediamine and bisphenol a type diether dianhydride as monomers, and carrying out condensation polymerization to obtain polyamide acid; carrying out complete imidization on the polyamide acid under the action of a catalyst isoquinoline to obtain polyimide containing a precursor; and reacting the polyimide containing the precursor with sodium bromoacetate to obtain polyimide containing carboxyl betaine. The zwitterions are introduced into the polyimide structure to improve the dielectric and energy storage performance of the polyimide dielectric film, and meanwhile, the preparation method has the advantages of being low in cost, simple in process, controllable and adjustable in performance, suitable for large-scale application and the like.

The present invention discloses a layered high energy storage density and high energy storage efficiency ceramic medium and a preparation method thereof. The ceramic medium is a layered structure formed by alternately stacking a first dielectric layer and a second dielectric layer. The first dielectric layer is a high polarization strength dielectric layer. The material includes (1-x-y)BiFeO 3 ‑xBaTiO 3 ‑yBa(Zn 1 / 2 Ta 2 / 3 ) 3 and Bi 0.39 Na 0.36 Sr 0.25 TiO 3 , where x = 0.30-0.40, y = 0.05-0.15; the second dielectric layer is a dielectric layer with high compressive strength and high energy storage efficiency, and the material includes (1-z)SrTiO 3 ‑zBiFeO 3 and BaBi 2 Nb 2 O 9 , wherein z=0.25-0.35; the minimum thickness of the layered structure is 25 μm. The preparation method of the present invention can obtain a ceramic medium with high energy storage density and high energy storage efficiency.

The invention discloses a buried multi-mode driving energy storage system which comprises a buried energy storage system, a liquid level regulation and control system and a heat exchanger device. The buried energy storage system comprises an energy storage device, a buried energy storage cavity and an efficient heat preservation layer. The liquid level and liquid quantity regulation and control system comprises three bypass pipelines, four electromagnetic valves, a variable-frequency liquid pump and a liquid storage container; temperature sensors are respectively arranged at the two working medium interfaces and in the middle of the two working medium interfaces; all the temperature sensors, the third temperature sensor of the heat exchanger, the five electromagnetic valves and the variable-frequency liquid pump are connected with a controller through signal cables. According to the buried multi-mode driving energy storage system, a passive cold storage mode and an active and passive dual-mode composite heat storage mode are adopted, the operation of the system is very reliable, the response speed is very high, and the system is very stable.

The invention discloses a new energy energy supply coupling method, an energy coupling station fused salt unit and a temperature control method of the energy coupling station fused salt unit, and relates to the technical field of heating systems.The new energy energy supply coupling method comprises the steps that a solar energy section is composed of a solar photovoltaic panel and a solar heat collection pipe; the air source heat pump unit is used for heating and refrigerating; the shallow ground source heat pump unit exchanges heat with the ground surface through a buried pipe in the shallow buried pipe well; the geothermal wells exchange heat, if medium-deep geothermal water is distributed at the depth of 1000-3000 m, two-hole geothermal well construction heating is conducted, and if geothermal water does not exist, a single well with the depth of 2000-3000 m is constructed, and heating is conducted through a center heat exchange pipe; boiler heating; and the energy coupling station is used for carrying out centralized management and transmission on the energy supply modes and storing the heat energy by utilizing the low-peak electric energy. The system has the effects of reducing energy emission and energy consumption waste during heating and achieving low-carbon and energy-saving heating.

The invention relates to the technical field of preparation of thin film materials, and particularly provides a BaTiO3 ferroelectric thin film with high energy storage at low temperature and a method and application of the BaTiO3 ferroelectric thin film. The preparation method of the BaTiO3 ferroelectric film comprises the following steps: processing a substrate, depositing a bottom electrode on the substrate, depositing a buffer layer on the bottom electrode, depositing a barium titanate dielectric layer on the buffer layer, and depositing a top electrode on the barium titanate dielectric layer. The step of depositing the buffer layer on the bottom electrode comprises the following steps of: adopting a LaNiO3 target material, keeping the temperature at 200 DEG C, and depositing the buffer layer on the substrate in a radio frequency or direct current magnetron sputtering mode; and the total film thickness of the buffer layer is 0-50nm. The problems that in the prior art, a barium titanate film prepared through an in-situ preparation method at the temperature of 200 DEG C is poor in performance, application requirements cannot be met, and the performance of a BaTiO3 ferroelectric film is regulated and controlled by the thickness of a buffer layer are solved.

The application discloses an iron-based barium sodium niobate ceramic material with high energy storage performance and a preparation method thereof. 4‑2x Sm 2x Na2Fe x Nb 10‑x O 30 , wherein 1<=x<=1.25. Barium carbonate, samarium oxide, sodium carbonate, ferrous oxide and niobium pentoxide are used as raw materials, and a standard solid-phase method is adopted to sinter the iron-based barium sodium niobate ceramic material. In the product formula, iron is used to replace niobium in the barium sodium niobate, which is lead-free, environment-friendly, rich in iron reserves and low in price, and is beneficial to control the cost of raw materials. In addition, the iron replacement is beneficial to enhance the relaxor ferroelectric performance of the material, can obtain a more slender hysteresis loop, and improves the energy storage efficiency of the material. The prepared ceramic material has few pores and cracks, high density, and the microstructure is obviously improved, the grain size is more fine and uniform, the ferroelectric polarization intensity and the breakdown field strength are significantly improved, the problem that the barium sodium niobate material is difficult to sinter is solved, and the ferroelectric performance and the energy storage performance are significantly improved.

The invention discloses barium titanate-based high-entropy dielectric ceramic as well as a preparation method and application thereof, and belongs to the technical field of dielectric energy storage ceramic materials. According to the barium titanate-based high-entropy dielectric ceramic disclosed by the invention, element volatilization in the sintering process is compensated by optimizing the numerical value of x, and meanwhile, the doping content of the elements is regulated and controlled, so that the barium titanate-based high-entropy dielectric ceramic is favorable for simultaneously obtaining excellent energy storage performance and dielectric property, and has excellent dielectric property; the barium titanate-based high-entropy dielectric ceramic is favorable for obtaining ceramics with lower loss and smaller dielectric fluctuation, has good temperature stability, low remanent polarization, large effective energy storage density and excellent dielectric properties, and solves the technical problem of large dielectric loss of the existing material.

The multistage compressed air energy storage system comprises a salt cavern air storage chamber, the inlet end of the salt cavern air storage chamber is connected with a multistage compression device and a first heat exchanger, and the outlet end of the salt cavern air storage chamber is connected with a multistage expansion power generation device and a second heat exchange device. The heat storage liquid outlet end of the first heat exchanger is connected to the heat storage liquid inlet end of the first heat exchanger through the high-temperature tank, the second heat exchange device and the low-temperature tank; the salt cavern gas storage chamber and the high-temperature tank are respectively connected with a pressure potential energy-heat energy coupling conversion device based on a Ponghua material, and the pressure potential energy-heat energy coupling conversion device is used for releasing heat energy when the pressure is increased and absorbing the heat energy when the pressure is reduced. When the compressed air energy storage system needs to store energy across months and even seasons, excess compressed air potential energy is converted into heat energy through the pressure-heat conversion device, so that potential energy output is improved, and the efficiency and economical efficiency of the system are improved.

This invention provides a production line-type elastic component energy storage system and its operating method. The production line-type elastic component energy storage system includes an elastic energy storage device, a conveying device, and a control mechanism. The elastic energy storage device includes at least one elastic energy storage component, an energy storage drive device, an input transmission mechanism, an output transmission mechanism, and an energy storage conversion device. By setting multiple elastic energy storage components and conveying devices, continuous energy storage operation is achieved on the elastic energy storage components, improving energy storage efficiency. This invention also provides an operating method for the production line-type elastic component energy storage system. By setting a minimum and a maximum set value for the elastic force of the elastic energy storage component, the elastic force of the elastic energy storage component at the workstation is detected, and the relationship between the detected elastic force value and the set value is compared, thereby selecting whether to perform energy storage or energy release operation. This method has simple steps, can quickly determine and select the corresponding energy storage or energy release operation, and has high working efficiency.

The present application discloses a photovoltaic emergency smart door lock adapted to different working environments, including an outer panel, an outer door handle is movably connected to the middle of the front side of the outer panel, an emergency energy storage mechanism is fixedly connected to the inner side of the outer door handle, and a light collection adjustment mechanism is fixedly connected to the top of the outer panel. The present application relates to the field of emergency smart door locks. By pulling the sliding sleeve out from the inner side of the top of the outer door handle, adjusting the position of the turn handle, manually rotating the turn handle, and turning the hand-cranked generator to start charging the battery, the normal operation of the battery charging guarantee device is ensured, and after emergency charging is completed, the emergency energy storage mechanism is recovered into the inner side of the outer door handle for closed storage, thereby improving the dust and anti-destruction protection of the emergency energy storage mechanism and increasing the service life of the emergency energy storage mechanism. This solves the problems of low energy storage efficiency of existing photovoltaic emergency smart door locks adapted to different working environments, low power generation efficiency due to the non-adjustable position of the photovoltaic panel, and high risk of privacy leakage.

The application provides an energy storage system, characterized in that the energy storage system comprises an energy storage device, a first energy storage module and a second energy storage module, wherein the energy storage device comprises a liquid storage device and a gas storage device and is arranged in an underwater area; the first energy storage module comprises a first compression device for compressing a first medium and a first expansion device for expanding the first medium, and the first energy storage module is connected with the gas storage device through a first pipeline; the second energy storage module comprises an evaporation device and a condensation device, and is used for storing and releasing energy by using the gas-liquid phase change of a second medium; the second energy storage module is connected with the gas storage device through a second pipeline and is connected with the liquid storage device through a third pipeline; and the first expansion device is connected with the second energy storage module through a fourth pipeline, so as to transfer the heat of the first medium to the second energy storage module. According to the above, the first energy storage module and the second energy storage module are coupled to store energy, and in the energy releasing stage, the heat generated by the first energy storage module is transferred to the second energy storage module, so that the energy storage efficiency is improved; the space of the gas storage device is used for shared storage of the first medium and the second medium, in the energy storage stage, the first medium is input and the second medium is output, and in the energy releasing stage, the first medium is output and the second medium is input, so that the utilization rate of the underwater space is improved.

The present invention discloses a compressed air electric energy storage system, including a constant pressure gas storage device, a high pressure liquid storage device, an energy storage component and an energy release component. In the energy storage state, the energy storage component converts electrical energy into air internal energy and stores it in the constant pressure gas storage unit in sequence. The pressure of the constant pressure gas storage device is adjusted to be constant and the liquid is recovered through the hydraulic pump and the hydraulic motor generator set; in the energy release state, the high pressure gas in the constant pressure gas storage unit drives the generator to generate electricity through the expansion unit, and at the same time, the high pressure liquid storage device injects liquid into the constant pressure gas storage unit to maintain its constant pressure, and uses the hydraulic pump set to recover the liquid in the gas storage unit that has completed the energy release. The present invention realizes constant pressure energy storage and energy release of the compressed air electric energy storage system through the recycling of high pressure liquid, which can effectively reduce the cost of large-scale electric energy storage capacity and improve the economy of the compressed air electric energy storage system.

This utility model discloses a distributed photovoltaic energy storage system, belonging to the field of photovoltaic energy storage technology, aiming to solve the problems of high thermal runaway risk, low conversion efficiency, and insufficient synergy between photovoltaic and energy storage in existing centralized energy storage technologies. The system includes multiple distributed energy storage PACK modules and an inverter. Each PACK module integrates photovoltaic modules, an energy storage battery pack, a DC MPPT DC / DC charge / discharge controller, and a BMS. Multiple PACK modules are connected in series to form a series group, and the output of the series group is connected to the inverter to achieve AC / DC conversion. Intelligent control and monitoring can also be achieved through an EMS communication manager and a power detector. This utility model reduces the risk of thermal runaway through a distributed design, improves efficiency by integrating an MPPT controller, adapts to traditional installation methods and supports flexible expansion, and can achieve efficient synergy and peak shaving between photovoltaic and energy storage, thereby improving the economic efficiency of energy utilization.