48 results about "Thermoelectric materials" patented technology

The utility model discloses a kind of semiconductor thermoelectric material cutting device, including frame, the inside of the frame is provided with hydraulic cylinder, the telescopic end of the hydraulic cylinder is connected with bottom plate, the top of the bottom plate is fixedly connected with fixed column, the top of the fixed column is fixedly connected with clamping mechanism, the inside of the frame is provided with shell, the side of the frame is fixedly connected with scale plate. Through the above structure, some semiconductor thermoelectric materials can be solved when cutting, material loosening or offset may occur, avoid the problem that instability may occur when cutting, and avoid the problem that the quality of material cannot be guaranteed, can solve part of semiconductor thermoelectric materials when cutting, may appear the case that staff needs to measure material length by oneself, avoid the problem that semiconductor thermoelectric material after cutting may need secondary accurate cutting, and avoid the problem of cost increase that appears in secondary cutting.

This invention discloses a method for optimizing the geometric parameters of a thermoelectric arm in a thermoelectric power generation system, relating to the field of thermoelectric power generation. The method includes: constructing a three-dimensional steady-state multiphysics coupled model of the thermoelectric power generation system; incorporating the height and cross-sectional area of ​​the thermoelectric arm as core geometric parameters to be optimized; and configuring the Seebeck coefficient, electrical conductivity, and thermal conductivity parameters corresponding to the thermoelectric material; setting boundary conditions for the model, including the target temperature at the hot end of the thermoelectric arm, the fluid velocity boundary corresponding to the cold end heat dissipation, and the system load resistance boundary, to ensure the model remains consistent with the actual working scenario. This invention improves model adaptation accuracy by constructing a multiphysics coupled model that fits the actual working conditions and dynamically adjusting material-related parameters. Combined with a parameterized scanning strategy with dynamic step sizes, it improves scanning efficiency while ensuring optimization effectiveness. The dual-objective optimization based on dynamic weights can flexibly adapt to different power supply requirements.

To provide a thermoelectric device for easy positioning and bonding processes and a thermoelectric stack for such device. A representative embodiment of the present invention is a thermoelectric stack comprising a thermoelectric material layer having a first surface and a second surface opposite each other and an isolation layer stacked on the first surface of the thermoelectric material layer, wherein the thermoelectric material layer has a magnetization component perpendicular to the first surface and the second surface, and the isolation layer comprises, when a second thermoelectric stack is stacked on the surface opposite to the surface on which the thermoelectric material layer is to be stacked, an insulation region that electrically insulates the thermoelectric material layer and an electrode region that electrically conducts the thermoelectric material layer. Also, a representative embodiment of the present invention is a thermoelectric device in which such thermoelectric stacks are stacked, wherein a plurality of first thermoelectric stacks in which thermoelectric material layers have positive transverse thermoelectric power and a plurality of second thermoelectric stacks in which thermoelectric material layers have negative transverse thermoelectric power are alternately brought into close contact with each other due to the magnetic force of their magnetized components, interposing their respective isolation layers, and are electrically connected by electrode regions of the isolation layers.

The present invention provides: a thermoelectric conversion member that makes it possible to reduce contact resistance between a MgAgSb-based thermoelectric material and an electrode; a production method for the same; and a thermoelectric conversion element.　A thermoelectric conversion member according to the present invention comprises at least: a thermoelectric conversion layer which comprises a p-type thermoelectric material that includes magnesium (Mg), silver (Ag), and antimony (Sb); and an Sb layer which is positioned on at least one end surface of the thermoelectric conversion layer. A production method for a thermoelectric conversion member according to the present invention comprises at least: forming a laminate of a raw material that includes Sb as a raw material for an Sb layer, and a p-type thermoelectric material or a raw material mixture for a p-type thermoelectric material that is obtained by mixing a raw material containing magnesium (Mg), a raw material containing silver (Ag), and a raw material containing antimony (Sb); and sintering the laminate.

The application provides a thermoelectric material, a preparation method thereof and a thermoelectric device, and the chemical formula of the thermoelectric material is Sn (1‑x‑y) Cu x La y Se, wherein 0<=x<=0.2 and 0 The thermoelectric material provided by the application is doped with lanthanum (La) and / or copper (Cu) to effectively control the polycrystalline tin selenide lattice arrangement and macroscopically, so that the thermoelectric material has high hole carrier concentration and dense crystal defects, thereby improving the ZT value of the thermoelectric material Sn (1‑x‑y) Cu x La y Se, and further improving the thermoelectric conversion efficiency of the thermoelectric material. Meanwhile, the thermoelectric material has a wide temperature range, can effectively utilize heat energy exceeding 200 DEG C, and has good application prospect.

The application provides a magnesium-based thermoelectric material and a preparation method and device thereof. The preparation method comprises the following steps: placing reaction raw materials of the magnesium-based thermoelectric material into a yttria-doped zirconia crucible; sealing the yttria-doped zirconia crucible containing the reaction raw materials into a tantalum crucible; sealing the tantalum crucible obtained in the step (2) into a quartz tube; and placing the sealed quartz tube into a rocking growth furnace to perform grain growth and solidification of the magnesium-based thermoelectric material. The preparation method provided by the application can prepare a magnesium-based thermoelectric material with higher performance and large grain size through a high-temperature melting method.

The application relates to a preparation method of a ternary alloy nanoflower and an organic hybrid composite film thereof, and belongs to the technical field of nanometer materials and functional films. BiCl3, SbCl3 and TeO2 are dissolved in ethylene glycol, NaOH and PVP K30 are added, stirring is carried out at room temperature until a clear solution is obtained, the solution is transferred to a reaction kettle, and reaction is carried out in a blast drying oven; after cooling, centrifugal washing is carried out; after drying, a Bi-Sb-Te alloy nanoflower is obtained; the Bi-Sb-Te alloy nanoflower is mixed with a PEDOT:PSS aqueous solution; a conductive enhancer is added, ultrasonic dispersion is carried out to form a uniform slurry; the slurry is deposited on the surface of a glass substrate by using a drying machine through a flow casting method; after annealing, the film is peeled off, vacuum drying is carried out, and a flexible thermoelectric composite film is formed. Through the establishment of a trinity technology of "nanoflower morphology design-in-situ interface optimization-low temperature solution process", the problems of poor flexibility of traditional thermoelectric materials, nanocomposite interface failure and unsustainable high-temperature process are solved.

This invention discloses a body-temperature power-generating fabric and its preparation method, belonging to the field of thermoelectric power generation technology. The body-temperature power-generating fabric comprises an upper layer of high thermal conductivity insulating fabric, a lower layer of high thermal conductivity insulating fabric, thermoelectric units, and an insulation layer. Conductive circuits are printed on both the upper and lower layers of high thermal conductivity insulating fabric. The thermoelectric units are arranged between the upper and lower layers and electrically connected to the conductive circuits. The insulation layer fills the area around the thermoelectric units. The preparation method includes: printing conductive circuits on the high thermal conductivity insulating fabric; arranging P-type and N-type thermoelectric materials; filling with insulation material; and assembling to obtain the body-temperature power-generating fabric. This invention organically combines textile processing technology with thermoelectric power generation technology, achieving high efficiency in body-temperature power generation while ensuring the comfort of the fabric itself. The power generation is adjustable and easy to prepare, making it suitable for mass production.

The application discloses a high-performance p-type GeTe-based thermoelectric material with introduced resonance energy level and a preparation method thereof, and belongs to the field of new energy materials. 0.85‑y Sb 0.1 Pb 0.05 Te-x%Mo; the method comprises the following steps: I, weighing; II, sealing; III, heating, melting and annealing treatment; and IV, sintering. The application is used for the high-performance p-type GeTe-based thermoelectric material with introduced resonance energy level and the preparation thereof.

The application relates to the technical field of semiconductors, in particular to a quartz tube sealing and connecting equipment for a semiconductor thermoelectric material preparation process. In view of the fact that a broken quartz tube cannot be recycled after being taken out during preparation of a crystal bar, the cost is increased, the quartz tube sealing and connecting equipment for the semiconductor thermoelectric material preparation process comprises a vertical table, a second support base is arranged at the lower end of one side of the vertical table, a quartz tube is arranged in the second support base, a second support base capable of moving up and down is arranged at the upper end of one side of the vertical table, a glass sealing tube is arranged in the second support base, clamping devices for fixing the quartz tube and the glass sealing tube are arranged on the inner walls of the first support base and the second support base respectively, a rotating transmission shaft is further arranged on the second support base, and the quartz tube and the glass sealing tube can be synchronously rotated through the driving of the transmission shaft after the second support base moves downwards to a specified position; the broken quartz tube can be sealed and treated, and is recycled again, so that the production cost is reduced.

A method for preparing a SnO2 hollow sphere / NiO cross-linked nanosheet composite-based gas sensor with high sensitivity for detecting triethylamine gas belongs to the field of thermoelectric materials technology. This invention aims to solve the problem of poor selectivity of SnO2 for triethylamine in existing methods. The method includes: 1. Injecting anhydrous tin tetrachloride liquid into anhydrous ethanol, followed by the sequential addition of distilled water and concentrated hydrochloric acid; 2. Preparing SnO2 hollow nanosphere powder; 3. Preparing a dispersion of SnO2 hollow nanospheres; 4. Preparing a nickel acetate solution; 5. Adding ammonia water to the nickel acetate solution; 6. Preparing SnO2 hollow nanosphere powder with Ni(OH)2 cross-linked nanosheets grown on its surface; 7. Preparing SnO2 hollow nanosphere powder with NiO cross-linked nanosheets grown on its surface; 8. Preparing the gas sensor. This invention is used for preparing a SnO2 hollow sphere / NiO cross-linked nanosheet composite-based gas sensor with high sensitivity for detecting triethylamine gas.

The present invention relates to a thermoelectric device for heat harvesting and a method for obtaining the device, wherein the thermoelectric device comprises: a substrate; a bottom conductive layer deposited on the substrate; a top conductive layer; a plurality of pillars of thermoelectric semiconductor material; an electrically insulating and thermally insulating layer enclosing the plurality of pillars; wherein the electrically insulating and thermally insulating layer and the thermoelectric material are disposed between the bottom conductive layer and the top conductive layer.

The application discloses a structure icing / snowing synchronous classification monitoring system based on energy sensing and computer vision, realizes composite self-power supply through a fan and a thermoelectric material, triggers a built-in high-definition camera of a deep residual network to perform morphological feature extraction in ice and snow weather, and realizes snow / icing / normal three-state classification identification for the first time; the output visual probability matrix, equivalent physical density and pre-physical prior feature are subjected to fusion analysis and judgment of multi-modal data, and all-weather autonomous monitoring and early warning of structure snow and icing synchronous classification are realized. Not only the problems of high energy consumption, difficult independent operation and single monitoring capacity of traditional equipment are effectively solved, but also precise synchronous classification of structure icing, snowing and normal state is realized, and the false alarm and missed alarm rates of traditional sensors are greatly reduced.

The present invention provides a self-powered wireless earphone comprising: first and second housing members constituting the body of the wireless earphone; a sound tube for guiding sound to the outside; and an eartip having an inner-skin member, an outer-skin member, and a thermoelectric element unit embedded in the outer-skin member and including a flexible thermoelectric material.

The application provides a Mg3Sb2-based thermoelectric device and a preparation method thereof, and belongs to the technical field of thermoelectric materials. The Mg3Sb2-based thermoelectric material is made into a powder, and the Mg3Sb2-based thermoelectric device is prepared by using a 3D printing mode; the thermoelectric arm material structure is dense, and the conductivity is good; the thermoelectric device pattern can be flexibly designed according to the application scene by using the 3D printing mode, the application range is wide, and the thermoelectric device with high integration and high power density is easy to prepare; the thermoelectric device preparation process is simple and efficient by using the 3D printing mode, and the development of the batch production technology of the flexible micro thermoelectric device is promoted; the electrode material is connected by using the 3D printing mode, the contact resistance between the electrode material and the thermoelectric material is small, and the output performance of the thermoelectric device is improved.

A thermoelectric element and a refrigerator may include: a thermoelectric material layer that has a plurality of anchor recesses formed on the upper surface and lower surface on the basis of cracks and having a depth of 0.1 μm to 10 μm; and a first diffusion-preventing layer that is disposed on the thermoelectric material layer and partially penetrates into the plurality of anchor recesses.

The application belongs to the technical field of thermoelectric materials, and particularly relates to n-type and p-type thermoelectric materials with the same chemical composition BiSbSe 3‑x Te x and a preparation method and application thereof. The application provides a thermoelectric material, which comprises n-type thermoelectric material or p-type thermoelectric material, and a molecular formula of the n-type thermoelectric material or the p-type thermoelectric material is independently BiSbSe 3‑x Te x , and 1<=x<=1.75. The thermoelectric material provided by the application can be made into n-type and p-type thermoelectric materials, and the components of the n-type and p-type thermoelectric materials are the same, and the alloy structures are similar, so that the obstacles encountered by the carriers during transmission can be greatly reduced, and the efficiency of thermoelectric conversion can be significantly improved. Because the thermal expansion coefficients are similar, the stress concentration caused by the difference in thermal expansion coefficients can be effectively reduced, the mechanical properties of the thermoelectric component are improved, and the development and design of the thermoelectric device with excellent performance are facilitated.

The application relates to the technical field of a thermoelectric material performance detection system based on a thermoelectric textile, and particularly discloses a thermoelectric material performance detection system based on a thermoelectric textile. The system comprises a temperature control loading platform, an electric heating signal acquisition unit, a computer vision strain sensing unit, an adaptive deformation compensation module and a central processing unit; the temperature control loading platform applies a controllable temperature gradient and contact pressure, the electric heating signal acquisition unit synchronously acquires voltage and current signals, the computer vision unit analyzes full-field strain through image sequences, the adaptive deformation compensation module dynamically corrects the electric heating signal in combination with a physical information neural network, and accurate Seebeck coefficients and electric conductivities are output. Through multi-modal sensing and physical constraint model fusion, the application realizes high-fidelity characterization of the performance of the easily-deformable thermoelectric textile under dynamic load, and improves test accuracy and repeatability.

The invention discloses an out-of-plane gradient type thermoelectric composite film, a preparation method thereof and a thermoelectric sensing device, and the preparation method comprises the steps: a, mixing a thermoelectric material and a low-thermal-conductivity material according to different mass percentages, and preparing a plurality of groups of prefabricated mixtures with different concentrations; b, mixing each prefabricated mixture with a solvent, and performing ultrasonic dispersion to obtain a plurality of groups of uniform dispersion liquid; c, through a step-by-step suction filtration method, the multiple sets of uniform dispersion liquid are sequentially subjected to vacuum suction filtration film forming according to a preset sequence, and the preset sequence corresponds to the fact that the concentration of the thermoelectric material in the dispersion liquid is changed in a gradient mode in the film forming direction; and d, drying the film formed by step-by-step suction filtration to obtain the thermoelectric composite film with the out-of-plane gradient structure. Compared with the prior art, the thermoelectric composite film prepared by the invention can maintain high thermoelectric conversion efficiency, and also can significantly improve temperature difference maintaining capability and device reliability.

A method for homogenous connection of a thermoelectric material and a metal electrode, a thermoelectric device connection structure and application, the homogenous connection method comprising the following steps: S1, forming a metallization functional layer on the end face of a thermoelectric arm made of a thermoelectric material by using a solid-phase forming process; S2, forming a homogenous connection layer on the surface of the metallization functional layer by using a physical deposition process, the material of the homogenous connection layer being the same as the material of the metal electrode to be connected or the main component of the homogenous connection layer being the same as the main component of the metal electrode to be connected; S3, welding the metal electrode to the surface of the homogenous connection layer by using a solder. The thermoelectric device connection structure prepared by the above homogenous connection method comprises a thermoelectric arm, a metallization functional layer, a homogenous connection layer, a solder layer and an electrode layer, and can be directly used for manufacturing a thermoelectric device. The connection method does not need an electroplating step, is simple, universal, reliable and environmentally friendly.

This invention belongs to the field of thermoelectric materials technology, specifically disclosing an ion thermoelectric gel device, its preparation method, and its application. The ion thermoelectric gel device includes at least one device; the device includes a first electrode, an ion thermoelectric gel unit, and a second electrode arranged in series; the first electrode and / or the second electrode includes a substrate layer and a conductive layer stacked together; the substrate layer is made of an elastic polymer material; the conductive layer is made of conductive particles and conductive nanowires; the conductive particles coat the surface of the conductive nanowires, and the materials of the conductive particles and the conductive nanowires are each independently selected from at least one of gold, silver, platinum, and copper. This device exhibits excellent ion thermoelectric potential and high normalized power density, effectively solving the long-standing core bottleneck of insufficient output power in this field.

A method of making a CsSnI3 perovskite thermoelectric (TE) material including mixing a fatty acid, a fatty amine, a C8-C30 hydrocarbon, and Cs2CO3 in a vessel to form a cesium mixture; heating the cesium mixture to a temperature of 400-450 K to form a heated mixture; dissolving SnI2 in an organophosphine to form a tin solution; mixing the tin solution and the heated mixture to form a reaction mixture; cooling the reaction mixture to form a precipitate comprising a CsSnI3 perovskite; enclosing the CsSnI3 perovskite in a chamber; pressurizing the chamber to a hydrostatic pressure of at least 0.1 GPa; and heating the chamber to a temperature of 300-1,000 K to form the CsSnI3 perovskite TE material having a ZT that is at least 0.1.

This invention discloses a waste heat recovery and utilization system and method for laptops based on thermoelectric conversion effects, belonging to the field of thermoelectric materials and devices technology. It includes: a distributed thermoelectric array module composed of multiple miniature TEG units distributed in high-heat areas of the laptop, generating electricity directly through temperature differences; an adaptive thermal management module including a thermally conductive silicone layer and miniature heat dissipation fins to optimize the temperature difference between the hot and cold ends; a multi-level power management module including a rectifier circuit, a DC-DC boost chip, and a recovery and storage battery device to convert the unstable low-voltage DC power output from the TEGs into stable electrical energy, which is then stored and supplied to the target device; and an intelligent control module that dynamically adjusts the working area of ​​the miniature thermoelectric power generation units based on temperature sensor data, prioritizing power generation at the location with the largest temperature difference, and matching power supply requirements through a PMIC chip. This invention achieves efficient waste heat conversion and utilization through innovative design, solving the problem of low thermoelectric conversion efficiency in miniaturized devices, and achieving energy saving and environmental protection.

This invention discloses a thermoelectric chemical battery device and control method integrating thermal energy storage, belonging to the field of thermal energy storage and thermoelectric power generation technology. The thermoelectric chemical battery of this invention includes a heat-absorbing material, a phase change thermal energy storage device, a battery anode, a battery cavity, and a battery cathode; the battery anode acts as the hot electrode to drive the thermoelectric chemical reaction, and the battery cathode acts as the cold electrode of the thermoelectric chemical battery. This device combines the advantages of phase change thermal energy storage and, through a designed strategy, achieves a thermoelectric chemical battery device capable of efficiently recovering and utilizing various types of fluctuating waste heat. The battery's Seebeck coefficient can reach more than 10 times that of semiconductor thermoelectric materials. The thermoelectric chemical battery can generate high voltage under small temperature differences and has the advantage of a flexible structure. Through flexible design of the encapsulation structure and electrodes, it can adapt to waste heat sources with different surface shapes, and can utilize small temperature differences to extract heat from the environment, thus having a wide range of applications.

The application discloses a method for predicting high power factor thermoelectric materials by anisotropy, and relates to the technical field of thermoelectric material performance prediction. First, two principal axis directions with anisotropy are determined, and the Seebeck tensor and the conductivity tensor of the two principal axis directions are obtained; then, the new Seebeck tensor and the new conductivity tensor of a new direction with a theta angle with the two principal axis directions are determined, and the value of the theta angle when the power factor is maximum is determined, so that the high power factor thermoelectric material is predicted.

The application relates to a kind of vehicle door emergency control method and system based on thermoelectric conversion, and the method comprises: using the flexible thermoelectric material array laid between the floor and battery pack in vehicle, real-time acquisition floor temperature change, and based on Seebeck effect, floor heat is converted into thermoelectric power difference;Based on the amplitude of thermoelectric power difference, in combination with the output voltage polarity and temperature space distribution characteristics of flexible thermoelectric material array, the overheating abnormal information of battery pack is obtained;In the case of vehicle electric control system power failure, according to the overheating abnormal information, the vehicle door is controlled to execute self-driven unlocking mode through hierarchical response, and the self-driven unlocking mode comprises: electromagnetic self-driven mode driven by thermoelectric power difference, and thermal mechanical drive mode generated by deformation tension of floor heat conduction shape memory alloy element.The application can automatically and reliably open the vehicle door lock in the extreme case of electronic door lock failure.