15results about How to "Improve energy storage efficiency" patented technology

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.

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 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 utility model discloses a kind of axial flow centrifugal compressor for compressed air energy storage, it is related to energy storage technical field, comprising: axial flow section, centrifugal section and main shaft;The axial flow section has casing and the axial flow rotor in the casing, the centrifugal section has volute and the centrifugal rotor in the volute, the casing is connected with the volute;The axial flow rotor is connected with the one end of the main shaft by fastener, the centrifugal rotor is sleeved on the main shaft, the upstream end of the centrifugal rotor is supported on the boss of the main shaft the downstream end of the centrifugal rotor is detachably connected with the main shaft by connecting structure.The utility model technical scheme, axial flow rotor and centrifugal rotor are respectively set as detachably connected with main shaft, so that axial flow rotor, centrifugal rotor and main shaft can be separately produced, for large flow, high pressure ratio compressor, independent production facilitates each part manufacturing.

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.

This utility model belongs to the field of heat dissipation technology for aerospace single-unit electronic components, and discloses a thermally conductive and temperature-equalizing energy storage device and an aerospace single-unit. The thermally conductive and temperature-equalizing energy storage device includes a shell and a temperature-equalizing component; wherein, an energy storage cavity is provided inside the shell, and the energy storage cavity is filled with an energy storage medium capable of absorbing heat; the temperature-equalizing component is disposed within the energy storage cavity, and a flow channel is opened within the temperature-equalizing component, with a working medium disposed within the flow channel; at least a portion of the temperature-equalizing component is in contact with the energy storage medium, and the temperature-equalizing component is configured to transfer heat. The thermally conductive and temperature-equalizing energy storage device provided by this utility model accelerates the speed of heat transfer, improves the efficiency of heat transfer, and improves the energy storage efficiency of the energy storage device.

The invention discloses a high-heat-capacity and low-corrosivity carbonate molten salt heat transfer and storage medium, a method and application, and belongs to the technical field of molten salt heat storage. The high-heat-capacity and low-corrosivity carbonate molten salt heat transfer and storage medium is prepared from K2CO3, Li2CO3, Na2CO3, AlCl3 and Al powder in percentage by mass, the Al powder and the AlCl3 powder are introduced into carbonate molten salt, the application target that the heat storage performance is excellent at the temperature of 600-850 DEG C can be achieved, and the heat transfer and storage efficiency of the carbonate molten salt is improved. And meanwhile, [Al] with considerable activity is generated by virtue of potential regulation capability of dissolved metal ions and gaseous chloride products by virtue of physical adsorption and chemical adsorption acting forces, so that the aim of reducing corrosion is fulfilled. The high-heat-capacity and low-corrosivity carbonate molten salt heat transfer and storage medium disclosed by the invention realizes the application goals of excellent heat storage performance and low corrosivity, is high in stability, simple in preparation process and easy for large-scale production, and can be applied to photo-thermal power generation and molten salt energy storage.

This utility model discloses an electrode boiler coupled with a solid thermal storage boiler energy storage system. The water supply pipe is connected to the electrode boiler via valve 5, and the output of the electrode boiler is connected to a first spherical tank via a pipe via valve 6, and then to a second spherical tank via valve 1. The output of the first spherical tank is connected to the user end via a pipe and valve 7, and the output of the second spherical tank is connected to the user end via a pipe and valve 3. The pipes connecting the second spherical tank to the user end pass through the solid thermal storage boiler. The system has high energy storage efficiency, long lifespan, and high safety. The solid thermal storage boiler directly heats the saturated steam stored in the spherical tanks, enabling rapid adaptation to changes in different heating scenarios and demands. It solves the problem that the superheated steam generated by the electrode boiler's superheater cannot be continuously and stably utilized during off-peak hours. The energy storage system can produce both saturated steam and superheated steam.

The invention relates to a broadband low-phase-noise voltage-controlled oscillator based on a CMOS (Complementary Metal Oxide Semiconductor) process, aiming at solving the problems that the wide tuning and low-phase-noise of the traditional Class-F VCO are difficult to be compatible, the tuning range is narrow and the like. The core architecture comprises four parallel VCO (Voltage Controlled Oscillator) units, a matched buffer and a two-stage alternative selector, each VCO unit is integrated with an exclusive optimized transformer, a multi-bit digital controlled switched capacitor array and a parallel resistor array, and a unilateral tuning design is adopted. The switched capacitor array comprises a coarse tuning unit and a fine tuning unit, and is matched with the overlapping margin of each VCO sub-band to realize seamless connection; the transformer adopts a composite regular octagonal structure, so that the quality factor and the coupling coefficient are improved; the buffer suppresses signal crosstalk, and the selector ensures rapid low-loss switching. According to the scheme, ultra-wide continuous tuning is achieved, the full-band phase noise optimally reaches-131.666 dBc / Hz and 1 MHz, the frequency stepping precision and the signal stability are both considered, and the antenna is suitable for high-frequency and high-requirement scenes such as 5G millimeter wave communication and radar detection.

The application provides a compressed carbon dioxide energy storage system and an operation method thereof, which comprises: low-pressure storage tanks, first throttles, first heat exchangers, compressor sets, coolers, high-pressure storage tanks, second throttles, reheaters, expander sets, second heat exchangers, pressure increasing devices and third heat exchangers which are sequentially connected to form a closed cycle; the low-pressure storage tanks are used for storing liquid carbon dioxide at normal temperature; the internal pressure of the low-pressure storage tanks is 3.5-7.2 MPa; the carbon dioxide at the outlet of the low-pressure storage tanks is stored in the high-pressure storage tanks in a liquid state or a supercritical state after being throttled, decompressed, compressed and cooled; the pressure of the high-pressure storage tanks is 7.4-25 MPa; the carbon dioxide at the outlet of the high-pressure storage tanks enters the low-pressure storage tanks in a normal-temperature liquid state after being throttled, reheated, expanded, cooled, pressurized and heat-exchanged; and the cold source required for cooling is obtained from the cold energy stored in the first heat exchangers and / or the third heat exchangers. The application can realize the liquid storage of carbon dioxide at normal temperature, reduces the dependence on low-temperature cold sources and improves the energy storage efficiency.

The utility model relates to the field of energy storage, concretely relates to a kind of energy storage device, comprising: shell, phase-change energy storage piece, heating component;The first accommodating cavity and second accommodating cavity are provided in the shell;The first accommodating cavity and the second accommodating cavity are all provided with phase-change energy storage piece;The heating component is connected with the first accommodating cavity and / or the second accommodating cavity, and the heating component is used to store energy for the phase-change energy storage piece.In the first accommodating cavity and second accommodating cavity, phase-change energy storage piece is provided;Heating component is provided outside the shell, and the heating component is connected with the first accommodating cavity and the second accommodating cavity, so that the heating component can provide thermal energy for the first accommodating cavity and the second accommodating cavity, so that the phase-change energy storage piece in the first accommodating cavity and the second accommodating cavity realizes energy storage, to improve the energy storage efficiency of energy storage device;Phase-change energy storage piece can also be applied to heating or refrigeration equipment, to make relevant equipment realize refrigeration or heating.

This utility model discloses a trapezoidal phase change plate with fins and a phase change heat storage and exchange airflow channel. The trapezoidal phase change plate has a W1 end and a W2 end, with the length of the W1 end being shorter than the length of the W2 end. Fins, including transverse and longitudinal fins, are arranged inside the trapezoidal phase change plate and are welded to the interior of the plate. In the direct ventilation channel, the W1 end of the phase change plate preferentially contacts the high-temperature hot air, and the phase change material at the W1 end melts preferentially compared to the W2 end. The phase change plate can adjust its slope ratio according to actual conditions to adapt to different cooling scenarios, effectively solving the problem of uneven melting of the phase change material leading to damage and resulting in low heat storage and release efficiency and unstable thermal performance.

The utility model relates to the field of energy storage, concretely relates to a kind of energy storage equipment, comprising: semiconductor refrigerator, heat transfer assembly, energy storage piece;The semiconductor refrigerator has refrigeration surface and heating surface, the heat transfer assembly is connected with the refrigeration surface of the semiconductor refrigerator and / or the heating surface of the semiconductor, and the heat transfer assembly is used to conduct the cold quantity and / or heat generated by the semiconductor refrigerator to the energy storage piece, to make the phase-change energy storage piece store cold or heat.By heat transfer assembly and heating surface or refrigeration surface connection, or in heating surface or refrigeration surface simultaneously setting heat transfer assembly, phase-change energy storage piece is set on heat transfer assembly, so that it can be realized heat conduction by heat transfer assembly, and then make energy storage equipment realize refrigeration or heating, or realize refrigeration and heating simultaneously, to improve the energy storage efficiency of energy storage equipment;Phase-change energy storage piece can also be applied to heating or refrigeration equipment, to make relevant equipment realize refrigeration or heating.

This utility model discloses a molten salt energy storage tank anti-crystallization layered stirring device in the field of energy storage equipment technology. It includes an energy storage tank body, with an inlet pipe fixedly connected to one side of the lower end of the tank body and an outlet pipe fixedly connected to one side of the upper end. Several placement discs are arranged inside the tank body. A first placement groove is fixedly formed on the outer upper end of each placement disc, and a second placement groove is fixedly formed on the inner upper end of each disc. A flow channel is fixedly formed at the lower end of each placement disc, and an overflow hole is fixedly formed at the upper end of the flow channel. This arrangement uses a layered placement method, and by introducing superheated steam, the superheated steam can fully contact each layer of molten salt, thereby rapidly heating the molten salt and storing energy, improving heating efficiency and accelerating energy storage efficiency.

This invention discloses a Ca2Nb2O7 glass-ceramic material with excellent energy storage efficiency and its preparation method. The method includes: Step 1, mixing Na2CO3, K2CO3, BaCO3, SrCO3, CaCO3, Bi2O3, TiO2, Nb2O5 and SiO2 evenly to obtain mixture A; Step 2, adding mixture A into a crucible preheated to 1100-1300℃, then raising the temperature to 1450℃ and holding it at that temperature to completely melt mixture A. The process continues until no more bubbles are generated, resulting in a melt. This melt is then poured into a mold preheated to 200°C, and after molding, product B is obtained. Step 3: Product B is transferred to an annealing furnace preheated to 500–600°C and held at that temperature. After cooling in the furnace, a glass sample is obtained. Step 4: The glass sample is placed in a muffle furnace and heated from room temperature to 800–1000°C at a rate of 5°C / min, and held at that temperature to crystallize the glass sample. After cooling in the furnace, Ca2Nb2O7 glass-ceramic material is obtained. This invention not only has a simple preparation process, but also produces Ca2Nb2O7 glass-ceramic with high breakdown strength and high energy storage efficiency.