Thermoelectric device testing device

Abstract

The invention discloses a thermoelectric device testing device which comprises a device body and a testing assembly, the testing assembly is arranged in the device body and comprises a hot end and a cold end, a testing space is defined between the hot end and the cold end, a to-be-tested thermoelectric device is arranged in the testing space, and the to-be-tested thermoelectric device is arranged in the testing space. A foil type thermocouple is arranged on one side, defining the test space, of the hot end and is suitable for collecting temperature data of the hot end. According to the thermoelectric device testing device, hot end temperature data can be accurately collected through the foil type thermocouple, the foil type thermocouple is rapid in thermal response, high in sensitivity and close to a heat source interface, the feedback speed and precision of hot end temperature change detection can be improved, and then the accuracy and efficiency of testing can be effectively improved; and reliable support is provided for performance evaluation and research and development optimization of the thermoelectric device to be tested.

Description

Technical Field

[0001] The present application relates to the technical field of thermoelectric device performance testing, and in particular to a thermoelectric device testing device. Background Art

[0002] With the rapid development of clean energy technology, thermoelectric devices, as a device that can directly convert thermal energy into electrical energy, have shown great application potential in the fields of ship power supply, waste heat recovery, environmental monitoring, etc. However, in the process of research and development and optimization of thermoelectric devices, accurate and efficient measurement of their power generation performance has become one of the key factors restricting technological progress. The power generation performance measurement system of thermoelectric devices in related technologies, such as the widely used PEM-3 and other equipment, although it meets the basic testing needs to a certain extent, has many limitations such as complex structure, large size, and cumbersome module replacement. More importantly, the power generation performance measurement system of thermoelectric devices in related technologies usually adopts the traditional temperature measurement method of installing armored thermocouples in metal holes for temperature measurement. Due to the large contact thermal resistance, slow response and susceptibility to interference, this temperature measurement method is difficult to accurately capture the true temperature of the hot and cold end interface of the thermoelectric device, which seriously reduces the accuracy of the evaluation of power generation performance and restricts the efficient research and development and application of thermoelectric technology. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a thermoelectric device testing device, which can accurately collect hot end temperature data through a foil-type thermocouple. The foil-type thermocouple has a rapid thermal response, high sensitivity and is close to the heat source interface, which can improve the feedback speed and accuracy of detecting hot end temperature changes, thereby effectively improving the accuracy and efficiency of the test, and providing reliable support for the performance evaluation and R&D optimization of the thermoelectric device to be tested.

[0004] According to the thermoelectric device testing device of the first aspect embodiment of the present application, the thermoelectric device testing device includes: a device body and a test component, the test component is arranged in the device body, and includes: a hot end and a cold end, a test space is defined between the hot end and the cold end, the thermoelectric device to be tested is arranged in the test space, and a foil-type thermocouple is arranged on one side of the hot end that defines the test space, and is suitable for collecting temperature data of the hot end.

[0005] According to the thermoelectric device testing device of the present application, the temperature data of the hot end can be accurately collected by using a foil-type thermocouple arranged on one side of the hot end. Compared with the related art that uses armored thermocouples installed in metal holes for temperature measurement, it is difficult to accurately capture the true temperature of the hot and cold end interfaces of the thermoelectric device, which seriously reduces the accuracy of the evaluation of the power generation performance. In the present application, foil-type thermocouples are used to collect the hot end temperature data. The foil-type thermocouples can achieve fast thermal response and high sensitivity through their relatively thin metal foil structure, thereby effectively improving the feedback speed and accuracy of the hot end temperature change, thereby improving the reliability and efficiency of the test, and providing strong support for the performance evaluation and R&D optimization of the thermoelectric devices to be tested.

[0006] According to some embodiments of the present application, the thickness dimension of the foil-type thermocouple is configured as A and satisfies: 0.01 mm≤A≤0.05 mm.

[0007] Furthermore, the device body includes: a box body and a clamping structure, the box body has a first vacuum chamber, and the test assembly and the thermoelectric device to be tested are arranged in the first vacuum chamber; the clamping structure is arranged in the box body, and is suitable for driving the hot end to move closer to or away from the cold end, and the hot end moves closer to the cold end to press the thermoelectric device to be tested between the hot end and the cold end.

[0008] Furthermore, the clamping structure includes: a first bracket, a handle and a transmission rod, the first bracket is arranged at the top end of the box body; the handle is movably arranged at the end of the first bracket away from the box body; the transmission rod is arranged in the first vacuum chamber, one end of the transmission rod is linked to the handle, and the other end is connected to the hot end.

[0009] Furthermore, the clamping structure further includes: an elastic member, wherein the elastic member is arranged between the handle and the transmission rod.

[0010] In some embodiments, the first bracket has a first plate extending in the width direction of the box body, one side of the first plate body in the height direction is connected to the handle, and the other side is provided with a flexible tube, and the flexible tube extends away from the first plate body and is connected to the box body, and the flexible tube has a second vacuum chamber connected to the first vacuum chamber; wherein one end of the transmission rod is connected to one end of the flexible tube close to the first plate body.

[0011] According to some embodiments of the present application, the device body also includes: a second bracket, the second bracket is arranged in the first vacuum chamber, the second bracket is provided with a movable second plate body, the second plate body extends in the width direction of the box body, and the second plate body is respectively connected to the other end of the transmission rod and the hot end on both sides in the height direction.

[0012] In some embodiments, the cold end includes: a water cooling jacket and a heat flux meter, wherein the water cooling jacket is arranged at the bottom end of the device body and is suitable for controlling the temperature of the cold end; the heat flux meter is arranged at one end of the water cooling jacket away from the device body and is suitable for measuring the heat generated by the cold end.

[0013] Furthermore, the cold end further comprises: a thermal resistor, which is used to collect temperature data of the cold end and to estimate the heat flow into the thermoelectric device to be tested according to Fourier's law.

[0014] According to some embodiments of the present application, a first graphite layer is provided on a side of the heat flow meter facing the thermoelectric device to be measured, and a second graphite layer is provided on a side of the foil thermocouple close to the thermoelectric device to be measured.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic diagram of a thermoelectric device testing device according to some embodiments of the present application;

[0018] Figure 2 is a schematic side view of the cooperation between a thermoelectric device to be tested and a foil-type thermocouple according to some embodiments of the present application;

[0019] Figure 3 It is a schematic top view of the cooperation between the thermoelectric device to be tested and the foil-type thermocouple according to some embodiments of the present application.

[0020] Reference numerals:

[0021] 10000, Thermoelectric device testing equipment;

[0022] 120, box body; 120a, first vacuum chamber;

[0023] 122, first side plate; 122a, vacuum pump interface; 122b, electric heater interface; 122c, thermoelectric device interface to be tested;

[0024] 124, second side plate; 124a, pressure sensor interface; 124b, heat flow meter interface; 124c, water cooling jacket liquid supply interface;

[0025] 140, compression structure; 142, first bracket; 1422, first plate; 1424, top plate; 144, handle; 146, transmission rod; 148, elastic member;

[0026] 160, flexible tube; 160a, second vacuum chamber;

[0027] 180, second bracket; 180a, second plate;

[0028] 210, foil type thermocouple; 212, plug; 214, first metal foil; 216, second metal foil; 217, thermocouple junction; 218, protective cover;

[0029] 220, electric heater; 230, heat soaking module; 262, base; 264, second graphite layer; 240, water cooling jacket; 250, heat flow meter; 260, thermal resistor; 270, first graphite layer; 280, pressure sensor;

[0030] 300. Thermoelectric device to be tested. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0033] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0036] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0039] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0040] The term "plurality" used in the present application refers to two or more (including two).

[0041] Reference below Figure 1-Figure 3A thermoelectric device testing device 10000 according to an embodiment of the present application is described.

[0042] like Figure 1 As shown, according to the thermoelectric device testing device 10000 of the embodiment of the first aspect of the present application, the thermoelectric device testing device 10000 includes: a device body and a testing component.

[0043] The test assembly is arranged in the device body and includes: a hot end and a cold end, a test space is defined between the hot end and the cold end, a thermoelectric device 300 to be tested is arranged in the test space, and a foil type thermocouple 210 is arranged on one side of the test space defined by the hot end, and is suitable for collecting temperature data of the hot end.

[0044] Specifically, the device body is the basic structure of the entire thermoelectric device testing device 10000, which can provide a mounting position for some other components of the thermoelectric device testing device 10000 (such as a test assembly), and can have a good bearing, fixing and protection effect on some other components of the test device. At the same time, the device body can also provide the required testing environment for the thermoelectric device 300 to be tested, for example, a vacuum or inert gas environment such as helium; the test assembly can be used to simulate the working conditions of the thermoelectric device 300 to be tested and collect key data, the hot end and the cold end of the test assembly can be arranged relative to each other, and a test space is defined between the hot end and the cold end, and the thermoelectric device 300 to be tested It is arranged in the test space, wherein the hot end can simulate the high temperature side of the thermoelectric device 300 to be tested when it is working, and the temperature can be controlled at a preset temperature by components such as the electric heater 220 to achieve the temperature condition of the high temperature side required for the test, while the cold end can simulate the low temperature side of the thermoelectric device 300 to be tested when it is working, and the preset low temperature state can be achieved by a refrigeration system (such as a water cooling system, a semiconductor refrigeration, etc.) to meet the temperature requirements of the low temperature side required for the test, and a temperature gradient is formed between the hot end and the cold end. By controlling the temperature of these two ends, the working state of the thermoelectric device 300 to be tested under different working conditions can be simulated to achieve a good test of the working performance of the thermoelectric device 300 to be tested. In addition, the foil type thermocouple 210 of the embodiment of the present application can be used to collect the temperature data of the hot end. The foil type thermocouple 210 can be composed of two thin metal foils of different materials to form a closed loop, and the temperature is reflected by measuring the thermoelectric potential generated by the temperature difference between the two ends. The thin metal foil is used for temperature measurement, which can achieve temperature measurement close to the heat source interface, and has fast response and high precision, and can accurately and quickly reflect the temperature change of the hot end surface, thereby providing more reliable test data.

[0045] It should be pointed out that the test component may include but is not limited to temperature control components such as cold ends and hot ends. The test component may also include data acquisition related components such as heat flow and output electrical parameters of the thermoelectric device 300 to be tested, so as to achieve data integration and control of heat flow, output electrical parameters, etc. These components work together to achieve a comprehensive evaluation of the performance of the thermoelectric device 300 to be tested.

[0046] According to the thermoelectric device testing device 10000 of the present application, the temperature data of the hot end can be accurately collected by using a foil-type thermocouple 210 arranged on one side of the hot end. Compared with the related art that uses an armored thermocouple installed in a metal hole for temperature measurement, it is difficult to accurately capture the true temperature of the hot and cold end interfaces of the thermoelectric device, which seriously reduces the accuracy of the evaluation of the power generation performance. In the present application, a foil-type thermocouple 210 is used to collect the hot end temperature data. The foil-type thermocouple 210 can achieve fast thermal response and high sensitivity through its relatively thin metal foil structure, thereby effectively improving the feedback speed and accuracy of the hot end temperature change, thereby improving the reliability and efficiency of the test, and providing strong support for the performance evaluation and R&D optimization of the thermoelectric device 300 to be tested.

[0047] In addition, in some specific embodiments of the present application, the hot end includes: an electric heater 220 and a heat equalization module 230, wherein the electric heater 220 is suitable for heating to reach a preset high-temperature side temperature, and the heat equalization module 230 is arranged on the side of the electric heater 220 close to the cold end. The heat equalization module 230 includes a base 262 connected to the electric heater 220, and a foil-type thermocouple 210 arranged at the end of the base 262 away from the electric heater 220, so as to achieve good heat equalization and temperature measurement functions.

[0048] like Figure 2 and Figure 3 As shown, according to some embodiments of the present application, the thickness dimension of the foil thermocouple 210 is configured as A, and satisfies: 0.01 mm≤A≤0.05 mm.

[0049] Specifically, when the thickness of the foil thermocouple 210 is too large, the foil thermocouple 210 will have a relatively large heat capacity, so that it will take longer to reach thermal equilibrium when the temperature changes, resulting in a longer response time of the foil thermocouple 210 and a reduced sensitivity to temperature changes; and when the thickness of the foil thermocouple 210 is too small, it may cause increased scattering and obstruction of electrons during transmission, increase resistivity, and thus reversely increase internal resistance, increase errors and fluctuations during the measurement process, and affect measurement accuracy and stability; therefore, by setting the thickness of the foil thermocouple 210 within the range of 0.01 mm to 0.05 mm, the thickness of the foil thermocouple 210 is appropriate, so that the foil thermocouple 210 can have good real-time and sensitivity of temperature reflection, and at the same time, the stability of the measurement and the accuracy of the results can be improved.

[0050] In addition, in some specific embodiments of the present application, the foil-type thermocouple 210 includes: a plug 212, a first metal foil 214, a second metal foil 216, and a protective cover 218. The plug 212 is suitable for matching with the socket to achieve electrical conduction; one end of the first metal foil 214 and one end of the second metal foil 216 are connected to the same side of the plug 212, and the other end of the first metal foil 214 and the other end of the second metal foil 216 are connected, and a thermocouple junction 217 is defined to achieve temperature measurement using the thermoelectric effect; the protective cover 218 is sleeved on the outer periphery of the first metal foil 214 and the second metal foil 216 to protect the first metal foil 214 and the second metal foil 216 from interference and damage by external factors, and the length of the protective cover 218 is less than the length of the first metal foil 214 and the second metal foil 216 to ensure that the protective cover 218 does not interfere with the connection between the first metal foil 214 and the second metal foil 216.

[0051] Furthermore, in some embodiments, the protective cover 218 is constructed as a polyimide tape, which has the advantages of high temperature resistance, voltage resistance, radiation protection, and good insulation. It can provide good insulation protection and high temperature protection, and improve the working safety of the foil thermocouple 210.

[0052] like Figure 1 As shown, according to some embodiments of the present application, the device body includes: a box body 120 and a pressing structure 140 .

[0053] Among them, the box body 120 has a first vacuum chamber 120a, and a test component and a thermoelectric device 300 to be tested are arranged in the first vacuum chamber 120a; the clamping structure 140 is arranged in the box body 120, and is suitable for driving the hot end to move closer to or away from the cold end, and the hot end moves closer to the cold end to press the thermoelectric device 300 to be tested between the hot end and the cold end.

[0054] Specifically, a test assembly is installed in the first vacuum chamber 120a, and the thermoelectric device 300 to be tested is accommodated. The box body 120 can separate the first vacuum chamber 120a from the outside, so that the first vacuum chamber 120a can provide the required low-pressure or vacuum environment for the entire test process to ensure the accuracy and stability of the test; the clamping structure 140 is used to drive the hot end to move closer to or away from the cold end. When the hot end moves close to the cold end to a preset position, the thermoelectric device 300 to be tested can be evenly compressed between the hot end and the cold end, so that the thermoelectric device 300 to be tested can be in full contact with the hot end and the cold end, thereby improving the stability and accuracy of the performance test of the thermoelectric device 300 to be tested.

[0055] It should be pointed out that the thermoelectric device power generation performance measurement system in the related art is a highly integrated package of electromechanical control and data processing software, and its operation mode is single, which limits the user's ability to customize operations and makes the measurement process lack flexibility. In the embodiment of the present application, the clamping structure 140 can be constructed as a mechanical transmission and configured with a pressure sensor 280 to achieve manual control or external electric rod electrical control of the relative movement between the hot end and the cold end, and the pressure sensor 280 is used to monitor and feedback the pressure data in real time to ensure that the thermoelectric device 300 to be tested is in a suitable pressure state during the test. The use of manual control or external electric rod electrical control can improve the test flexibility and ease of operation, which is conducive to improving test efficiency and saving time and economic costs.

[0056] In addition, in some specific embodiments of the present application, a visual window is provided on the box 120 to facilitate visual observation of the detection process, which is beneficial to further improve the controllability and flexibility of the detection.

[0057] like Figure 1 As shown, according to some embodiments of the present application, the clamping structure 140 includes: a first bracket 142 , a handle 144 and a transmission rod 146 .

[0058] Among them, the first bracket 142 is arranged at the top of the box body 120; the handle 144 is movably arranged at one end of the first bracket 142 away from the box body 120; the transmission rod 146 is arranged in the first vacuum chamber 120a, one end of the transmission rod 146 is linked to the handle 144, and the other end is connected to the hot end.

[0059] Specifically, the first bracket 142 can be fixed at the top of the box body 120 as a supporting point of the entire clamping structure 140. The first bracket 142 can withstand the force generated when the handle 144 is operated and ensure that the transmission rod 146 can move smoothly; the handle 144 can be set at the end of the first bracket 142 away from the box body 120 and can be moved relative to the handle 144. It can be understood that the handle 144 is movably set at the top of the first bracket 142, and the handle 144 is linked to one end of the transmission rod 146, and the other end of the transmission rod 146 is connected to the hot end, so that the user can control the movement of the transmission rod 146 by operating the handle 144. The movement of the transmission rod 146 can drive the hot end to move, thereby realizing manual adjustment of the distance between the thermoelectric device 300 to be tested and the hot end and the cold end, thereby improving operational flexibility.

[0060] For example, in some specific embodiments of the present application, at least part of the outer periphery of the handle 144 is formed with a first thread, the top of the first bracket 142 has a top plate 1424 extending in the width direction of the box 120, the top plate 1424 has a through hole penetrating in the height direction of the box 120, and the inner surface of the through hole is formed with a second thread, and the second thread is suitable for matching with the first thread. Through the matching of the first thread and the second thread, when the user rotates the handle 144, the handle 144 can be driven to move along the axial direction of the through hole, so as to control the transmission rod 146 and the hot end to move closer to or away from the cold end. The way in which the handle 144 and the first bracket 142 are threadedly matched can improve the transmission stability, reliability and transmission efficiency.

[0061] In some other specific embodiments of the present application, a first locking portion is provided on the handle 144, and a second locking portion is provided on the first bracket 142. The first locking portion is suitable for cooperating with the second locking portion, and can selectively lock the handle 144 with the first bracket 142. The first locking portion and the second locking portion can be constructed as a plug-in fit (such as a pin shaft and an axial hole, etc.) or a snap fit (such as a protrusion and a groove, etc.). When the operating handle 144 drives the transmission rod 146 and the hot end to move to the position where the thermoelectric device 300 to be tested is pressed against the hot end and the cold end, the first locking portion cooperates with the second locking portion to lock the handle 144 at this position. In this way, the stability of the handle 144 can be improved, the thermoelectric device 300 to be tested can be maintained in a preset pressure state, and the test reliability of the thermoelectric device to be tested can be further improved.

[0062] like Figure 1 As shown, according to some embodiments of the present application, the clamping structure 140 further includes: an elastic member 148 , and the elastic member 148 is disposed between the handle 144 and the transmission rod 146 .

[0063] Specifically, an elastic member 148 may be provided between the handle 144 and the transmission rod 146. The elastic member 148 itself has a certain elasticity. When the handle 144 moves close to the transmission rod 146, the elastic member 148 may be compressed under the force of the handle 144 and drive the transmission rod 146 to move close to the cold end. In this process, the elastic member 148 can absorb and alleviate the impact force and vibration generated by the handle 144, which helps to protect the transmission rod 146 and the thermoelectric device 300 to be tested from sudden mechanical stress, thereby extending the service life of the transmission rod 146 and ensuring the accuracy of the test. In addition, prevent overpressure: In some cases, if improper operation or equipment failure causes excessive rotation of the handle 144, the elastic member 148 can be used as a safety mechanism to prevent the transmission rod 146 and the thermoelectric device 300 to be tested from being subjected to excessive pressure. When the pressure exceeds a certain threshold, the elastic member 148 can be significantly deformed and generate a large reaction force, thereby preventing the further rotation of the handle 144, which can effectively protect the transmission rod 146 and the thermoelectric device 300 to be tested from being damaged.

[0064] Exemplarily, the elastic member 148 is constructed as a spring, which has the advantages of good elastic deformation ability, good durability, easy installation and disassembly, and low cost. Therefore, by constructing the elastic member 148 as a spring, the elastic member 148 can have good buffering performance and service life, and is conducive to cost saving and improving assembly and maintenance convenience.

[0065] like Figure 1 As shown, according to some embodiments of the present application, the first bracket 142 has a first plate body 1422 extending in the width direction of the box body 120, one side of the first plate body 1422 in the height direction is connected to the handle 144, and the other side is provided with a flexible tube 160, and the flexible tube 160 extends away from the first plate body 1422 and is connected to the box body 120, and the flexible tube 160 has a second vacuum chamber 160a connected to the first vacuum chamber 120a; wherein one end of the transmission rod 146 is connected to one end of the flexible tube 160 close to the first plate body 1422.

[0066] Specifically, the first plate body 1422 can be arranged at the middle position of the first bracket 142 in the height direction of the box body 120, and the first plate body 1422 extends in the width direction of the box body 120. One side of the first plate body 1422 in the height direction can be connected to the handle 144. By setting the first plate body 1422, the stability of the first bracket 142 itself can be improved, and the transmission reliability of the handle 144 and the transmission rod 146 can also be improved. In the embodiment of the present application, a flexible tube 160 is arranged between the first plate body 1422 and the box body 120. The flexible tube 160 can be a tubular structure with flexibility and elasticity, which can be bent, twisted and axially deformed to a certain extent. A second vacuum chamber 160a is provided in the flexible tube 160, and the second vacuum chamber 160a is connected to the first vacuum chamber 120a to ensure the consistency and stability of the overall test environment. Among them, one end of the flexible tube 160 close to the first plate body 1422 is connected to one end of the transmission rod 146 (that is, the end of the transmission rod 146 away from the hot end), so that the transmission rod 146 can move with the rotation of the handle 144. At the same time, through the flexible connection of the flexible tube 160, the buffer protection between the handle 144 and the transmission rod 146 can be further enhanced. In addition, by providing the flexible tube 160, it is also possible to strictly control the leakage rate and optimize the sealing performance of the first vacuum chamber 120a and the second vacuum chamber 160a.

[0067] like Figure 1 As shown, according to some embodiments of the present application, the device body also includes: a second bracket 180, the second bracket 180 is arranged in the first vacuum chamber 120a, the second bracket 180 is provided with a movable second plate 180a, the second plate 180a extends in the width direction of the box body 120, and the second plate 180a is connected to the other end and the hot end of the transmission rod 146 on both sides in the height direction.

[0068] Specifically, the second bracket 180 can be accommodated in the first vacuum chamber 120a and fixedly connected to the bottom end of the box 120. The second bracket 180 can be used to support and fix the test assembly in the box 120, etc., to ensure that the position of the test assembly and the thermoelectric device to be tested is accurate and the test is reliable. The second bracket 180 can be provided with a second plate 180a, and the second plate 180a can move relative to the second bracket 180. The second plate 180a is connected to the other end of the transmission rod 146 and the hot end on both sides in the height direction. When the handle 144 drives the transmission rod 146 to move, the transmission rod 146 can drive the second plate 180a to move, and then the second plate 180a drives the hot end to move, so as to adjust the distance between the hot end and the thermoelectric device 300 to be tested. The second plate 180a extends in the width direction of the box 120, providing a stable connection foundation for the transmission rod 146 and the hot end, and improving the stability of the movement of the transmission rod 146 and the hot end. In addition, the second plate 180a can also improve the stability and reliability of the overall structure of the second bracket 180 and the test assembly, prevent errors and failures caused by loose or deformed components during the test process, and further improve the accuracy of the test results.

[0069] like Figure 1 As shown, according to some embodiments of the present application, the cold end includes: a water cooling jacket 240 and a heat flow meter 250 .

[0070] The water cooling jacket 240 is disposed at the bottom of the device body and is suitable for controlling the temperature of the cold end; the heat flux meter 250 is disposed at one end of the water cooling jacket 240 away from the device body and is suitable for measuring the heat generated by the cold end.

[0071] Specifically, the water cooling jacket 240 can be arranged at the bottom end of the device body, and a cooling water channel can be arranged inside the water cooling jacket 240. The cooling channel can be used for the circulation of the coolant to take away the heat, thereby maintaining the low temperature state of the cold end, and the cold end can be controlled at a preset temperature to simulate the cold end condition of the thermoelectric device 300 to be tested when it is working during the test process. In addition, the water cooling jacket 240 can stably control the temperature of the cold end, which can effectively improve the accuracy and reliability of the test; the heat flow meter 250 can accurately calculate the heat value generated by the cold end by measuring the temperature difference between the cold end and the coolant of the thermoelectric device 300 to be tested and the flow rate of the coolant, thereby accurately reflecting the heat generation of the cold end. By combining the water cooling jacket 240 and the heat flow meter 250, the cold end can realize the dual functions of temperature control and heat measurement, which helps to ensure the stability of the cold end temperature during the test process, while improving the accuracy and reliability of heat measurement.

[0072] like Figure 1As shown, according to some embodiments of the present application, the cold end further includes: a thermal resistor 260, which is used to collect temperature data of the cold end and to estimate the heat flow into the thermoelectric device 300 to be tested according to Fourier's law.

[0073] Specifically, the thermal resistor 260 can measure the temperature of the cold end surface and provide real-time feedback on the temperature state of the cold end to provide basic data for subsequent heat estimation and temperature control. In addition to temperature data acquisition, the thermal resistor 260 can be used to estimate heat flow. According to Fourier's law (i.e., the law of heat conduction), the heat flow is proportional to the temperature gradient, thermal conductivity, and heat transfer area. By measuring the temperature difference between the cold end and the coolant, and combining parameters such as the thermal conductivity and heat transfer area of ​​the material, the thermal resistor 260 can estimate the heat flow flowing into the thermoelectric device 300 to be tested, and then the thermal performance of the thermoelectric device 300 to be tested during operation can be detected. Therefore, by setting the thermal resistor 260, the temperature data acquisition and heat flow estimation capabilities of the thermoelectric device testing device 10000 are increased, which helps to more accurately evaluate the thermal performance of the thermoelectric device.

[0074] In addition, the thermal resistor 260 has the advantage of high measurement accuracy, especially in the medium and low temperature range, its accuracy is usually higher than that of temperature measuring elements such as thermocouples. Therefore, applying the thermal resistor 260 to the cold end can effectively improve the accuracy of data collection such as the temperature and heat flow of the cold end. At the same time, the thermal resistor 260 also has the advantages of good working stability and good vibration resistance. Therefore, it is also beneficial to further improve the reliability of the detection results, and to extend the service life of the thermoelectric device testing device 10000 and save maintenance costs.

[0075] like Figure 1 As shown, according to some embodiments of the present application, a first graphite layer 270 is disposed on a side of the heat flow meter 250 facing the thermoelectric device 300 to be tested, and a second graphite layer 264 is disposed on a side of the foil thermocouple 210 close to the thermoelectric device 300 to be tested.

[0076] Specifically, the first graphite layer 270 is arranged on the side of the heat flow meter 250 facing the thermoelectric device 300 to be tested, and the second graphite layer 264 is arranged on the side of the foil thermocouple 210 close to the thermoelectric device 300 to be tested, so that graphite layers are arranged between the thermoelectric device 300 to be tested and the cold end and the hot end. Graphite has the characteristics of low friction coefficient, good toughness, good thermal conductivity and good thermal stability. Therefore, by arranging the first graphite layer 270 and the second graphite layer 264, on the one hand, the first graphite layer 270 and the second graphite layer 264 can absorb and disperse the impact force between the thermoelectric device 300 to be tested and the cold end and the hot end respectively, especially during the compression process of the thermoelectric device 300 to be tested, the first graphite layer 270 and the second graphite layer 264 can absorb and disperse the impact force between the thermoelectric device 300 to be tested and the cold end and the hot end respectively. The graphite layer 270 and the second graphite layer 264 can prevent the thermoelectric device 300 to be tested from directly contacting the cold end and the hot end to generate stress concentration, thereby playing a good buffering role and effectively protecting the thermoelectric device 300 to be tested and the test components; on the other hand, the first graphite layer 270 and the second graphite layer 264 can also quickly disperse and balance the heat, so that the thermal contact between the thermoelectric device to be tested and the cold end and the hot end is tighter and more uniform, and the heat transfer efficiency is improved, so that the accuracy of the data collected by the foil thermocouple 210, the heat flux meter 250 and the thermal resistor 260 can be improved, and the detection accuracy and stability of the thermoelectric device testing device 10000 are further improved.

[0077] It should be pointed out that the use of graphite material to form the first graphite layer 270 and the second graphite layer 264 is an exemplary embodiment of the present application. In other embodiments, thermal interface materials such as carbon fiber can be provided between the thermoelectric device 300 to be tested and the heat flow meter 250 and the foil thermocouple 210 to achieve buffer protection and thermal conduction optimization, and the present application does not limit this.

[0078] In addition, in some specific embodiments of the present application, the box 120 has a first side plate 122 and a second side plate 124 opposite to each other in the width direction, and the first side plate 122 is provided with a plurality of first interfaces spaced in the height direction, and the plurality of first interfaces include: a vacuum pump interface 122a, an electric heater interface 122b, and a thermoelectric device interface 122c to be tested; the second side plate 124 is provided with a plurality of second interfaces spaced in the height direction, and the plurality of second interfaces include: a pressure sensor interface 124a, a heat flow meter interface 124b, and a water cooling jacket liquid supply interface 124c. Among them, the vacuum pump interface 122a is suitable for connecting with equipment such as a vacuum pump or an inert gas cylinder to realize the formation of a vacuum detection environment or an inert gas detection environment in the box 120. The electric heater interface 122b is used to connect the electric heater 220 to power the electric heater 220 to realize hot end heating. The thermoelectric device interface 122c to be tested is used to connect the electrodes of the thermoelectric device 300 to be tested to realize the thermoelectric conversion of the thermoelectric device 300 to be tested. The pressure sensor interface 124a is used to connect the pressure sensor 280 to monitor and collect pressure data in real time during the pressing process. The heat flow meter interface 124b is used to connect the heat flow meter 250, and can be connected to the thermal resistor 260, the foil thermocouple 210, etc., to achieve both the collection of collected data and power supply integration. The water cooling jacket liquid supply interface 124c is used to connect the liquid supply system of the water cooling jacket 240 to provide cooling liquid for the water cooling jacket 240 to ensure the stability of the cold end temperature during the test.

[0079] By providing multiple spaced interfaces on different side walls, the thermoelectric device testing device 10000 can be highly modularized, so that each component can be replaced or upgraded independently, thereby improving the flexibility and scalability of the testing device. At the same time, each interface can be designed in a standardized manner to improve the compatibility of the interface with different thermoelectric devices to be tested and test components, thereby improving the versatility and flexibility of the thermoelectric device testing device 10000 and saving the use and maintenance costs of the thermoelectric device testing device 10000.

[0080] In the related art, the thermoelectric device power generation performance measurement system has strict restrictions on the size of the testable thermoelectric devices, which generally does not exceed 40mm×40mm, which greatly reduces the application scope of the measurement system. The thermoelectric device testing device 10000 of the present application optimizes the functionality, modularization and standardization of the box 120 and the test components, and can realize performance testing of larger-sized thermoelectric devices, and the detection is accurate and reliable.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0082] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A thermoelectric device testing device, characterized in that: include: device body; A test component is arranged in the device body and comprises: a hot end and a cold end, a test space is defined between the hot end and the cold end, a thermoelectric device (300) to be tested is arranged in the test space, a foil type thermocouple (210) is arranged on one side of the hot end defining the test space and is suitable for collecting temperature data of the hot end.

2. The thermoelectric device testing device according to claim 1, characterized in that: The thickness dimension of the foil-type thermocouple (210) is A, and satisfies: 0.01 mm≤A≤0.05 mm.

3. The thermoelectric device testing device according to claim 1, characterized in that: The device body comprises: A box (120), the box (120) having a first vacuum chamber (120a), wherein the test assembly and the thermoelectric device (300) to be tested are arranged in the first vacuum chamber (120a); A pressing structure (140) is arranged on the box body (120) and is suitable for driving the hot end to move closer to or away from the cold end, and the hot end moves closer to the cold end to press the thermoelectric device (300) to be tested between the hot end and the cold end.

4. The thermoelectric device testing device according to claim 3, characterized in that: The pressing structure (140) comprises: A first bracket (142), the first bracket (142) being arranged at a top end of the box body (120); a handle (144), the handle (144) being movably disposed at an end of the first bracket (142) facing away from the box body (120); A transmission rod (146), wherein the transmission rod (146) is disposed in the first vacuum chamber (120a), one end of the transmission rod (146) is linked to the handle (144), and the other end is connected to the hot end.

5. The thermoelectric device testing device according to claim 4, characterized in that: Also includes: An elastic member (148), wherein the elastic member (148) is disposed between the handle (144) and the transmission rod (146).

6. The thermoelectric device testing device according to claim 4, characterized in that: The first bracket (142) has a first plate (1422) extending in the width direction of the box (120), one side of the first plate (1422) in the height direction is connected to the handle (144), and the other side is provided with a flexible tube (160), and the flexible tube (160) extends away from the first plate (1422) and is connected to the box (120), and the flexible tube (160) has a second vacuum chamber (160a) connected to the first vacuum chamber (120a); wherein one end of the transmission rod (146) is connected to one end of the flexible tube (160) close to the first plate (1422).

7. The thermoelectric device testing device according to claim 4, characterized in that: The device body also includes: a second bracket (180), the second bracket (180) is arranged in the first vacuum chamber (120a), the second bracket (180) is provided with a movable second plate (180a), the second plate (180a) extends in the width direction of the box body (120), and the second plate (180a) is connected to the other end of the transmission rod (146) and the hot end on both sides in the height direction.

8. The thermoelectric device testing device according to claim 1, characterized in that: The cold end comprises: A water cooling jacket (240), the water cooling jacket (240) being arranged at the bottom end of the device body and being suitable for controlling the temperature of the cold end; A heat flow meter (250) is arranged at one end of the water cooling jacket (240) away from the device body and is suitable for measuring the heat generated by the cold end.

9. The thermoelectric device testing device according to claim 8, characterized in that: Also includes: A thermal resistor (260) is used to collect temperature data of the cold end and to estimate the heat flow into the thermoelectric device (300) to be tested according to Fourier's law.

10. The thermoelectric device testing device according to claim 8, characterized in that: A first graphite layer (270) is provided on the side of the heat flow meter (250) facing the thermoelectric device (300) to be measured, and a second graphite layer (264) is provided on the side of the foil-type thermocouple (210) close to the thermoelectric device (300) to be measured.

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