Thermoelectric device performance test equipment and test method

Abstract

The invention relates to the technical field of thermoelectric device performance testing, and discloses thermoelectric device performance testing equipment and a testing method, the thermoelectric device performance testing equipment comprises a pressing device, a cold surface testing device and a hot surface testing device, the pressing device is used for driving the cold surface testing device to rise or fall; the cold surface testing device comprises a temperature difference testing assembly and a refrigerating capacity testing assembly, the temperature difference testing assembly and the refrigerating capacity testing assembly are respectively used for being in contact with cold surfaces of different products and monitoring the temperature of the cold surfaces, the hot surface testing device is used for placing a plurality of products, and the hot surface testing device is used for being in contact with hot surfaces of different products and monitoring the temperature of the hot surfaces. Therefore, automatic testing is achieved, manpower input is reduced, cost is saved, meanwhile, testing accuracy is improved, synchronous testing of temperature difference testing and refrigerating capacity testing is achieved, testing efficiency is improved, and multiple testing requirements are met.

Description

Technical Field

[0001] This invention patent relates to the technical field of performance testing of thermoelectric devices. Specifically, it relates to performance testing equipment and testing methods for thermoelectric devices. Background Art

[0002] With the diversity and complexity of market products, the application scope of ultra - micro thermoelectric coolers is becoming wider and wider. Subsequently, the performance testing of ultra - micro thermoelectric coolers is particularly important. The performance testing of thermoelectric coolers is generally for larger - sized thermoelectric coolers. However, due to the increasing miniaturization of thermoelectric coolers, the testing accuracy, repeatability, and reproducibility of previous testing machines are difficult to meet the requirements.

[0003] Currently, in order to meet the performance testing of micro thermoelectric coolers, performance testing equipment has been developed. For example, the prior patent with the authorization announcement number CN221746200U discloses a performance testing device for micro thermoelectric refrigeration devices, including: a vacuum system, a temperature control system, a micro thermoelectric refrigeration device testing unit, and a host computer. The temperature control system includes: a thermoelectric cooler, a temperature - control thermocouple, a temperature - control circuit board, and a heat - dissipating copper table. The upper surface of the heat - dissipating copper table is inside the vacuum system, and the lower surface of the heat - dissipating copper table is exposed to the atmosphere. The heat - dissipating copper table is sealed with the vacuum system through a sealing ring. The thermoelectric cooler is installed on the upper surface of the heat - dissipating copper table, and the temperature - control thermocouple is arranged on the upper surface of the thermoelectric cooler. The temperature - control circuit board integrates a temperature - control module, a thermocouple temperature measurement module, and a power output module that are respectively connected to the temperature - control module. The temperature - control thermocouple is connected to the thermocouple temperature measurement module, and the thermoelectric cooler is connected to the power output module. The temperature - control module is connected to the host computer. The thermoelectric refrigeration device testing unit includes: a temperature - measuring thermocouple, a thermometer, and a digital source meter. The micro thermoelectric refrigeration device to be tested is closely arranged on the upper surface of the thermoelectric cooler. The temperature - measuring thermocouple is attached to the upper surface of the micro thermoelectric refrigeration device to be tested and connected to the thermometer. The digital source meter is connected to the output electrodes of the micro thermoelectric refrigeration device to be tested by the four - wire method. The host computer is respectively connected to the thermometer, the digital source meter, the temperature - control circuit board, and the vacuum system, and then collects the temperatures of the cold end and the hot end of the micro thermoelectric refrigeration device to be tested and the voltage across its two ends, and sends the target temperature in the temperature list to the temperature - control circuit board and the set current in the current list to the digital source meter.

[0004] In the prior art, the performance testing device for thermoelectric devices cannot test the cooling capacity performance of thermoelectric devices, and the testing is not comprehensive. Summary of the Invention

[0005] The purpose of the present invention is to provide performance testing equipment and testing methods for thermoelectric devices, aiming to solve the problem that in the prior art, the performance testing equipment for thermoelectric devices cannot test the cooling capacity performance of thermoelectric devices.

[0006] The present invention is implemented as follows. A performance testing device for a thermoelectric device, characterized in that it includes a downward pressing device, a cold surface testing device, and a hot surface testing device. The cold surface testing device is installed on the downward pressing device, and the downward pressing device is used to drive the cold surface testing device to move up or down. The cold surface testing device and the hot surface testing device are arranged vertically corresponding to each other. The cold surface testing device includes a temperature difference testing assembly and a refrigerating capacity testing assembly. The temperature difference testing assembly and the refrigerating capacity testing assembly are respectively used to contact the cold surfaces of different products and monitor the cold surface temperatures. The hot surface testing device is used to place multiple products, and the hot surface testing device is used to contact the hot surfaces of different products and monitor the hot surface temperatures.

[0007] Further, the temperature difference testing assembly includes a main testing module, a secondary testing module, and a first cold temperature sensing wire. The first cold temperature sensing wire passes through the secondary testing module and extends to be assembled and connected with the main testing module. The main testing module and the secondary testing module are arranged in series through the first cold temperature sensing wire. The hot surface testing device includes a first product placement area and a second product placement area. The first product placement area is used to place products to be tested, and the second product placement area is used to place non-tested products. The main testing module and the first product placement area are vertically corresponding to each other, and the secondary testing module and the second product placement area are vertically corresponding to each other. The first cold temperature sensing wire is used to detect the cold surface temperatures of products to be tested and non-tested products.

[0008] Further, the main testing module includes a main insulating block, a main wiring block, and a main copper block. The main insulating block is used for insulation and heat insulation. Along the top-down direction, the main insulating block, the main wiring block, and the main copper block are sequentially stacked and assembled. The main insulating block is assembled with the downward pressing device. The main wiring block is used for the assembly of the first cold temperature sensing wire. The main copper block is used to contact the cold surface of the product to be tested. The secondary testing module includes a secondary insulating block, a secondary wiring block, and a secondary copper block. The secondary insulating block is used for insulation and heat insulation. Along the top-down direction, the secondary insulating block, the secondary wiring block, and the secondary copper block are sequentially stacked and assembled. The secondary insulating block is assembled with the downward pressing device. The first cold temperature sensing wire passes through the secondary wiring block and extends through the main wiring block. The secondary copper block is used to contact the cold surface of the non-tested product. The temperature difference testing assembly includes an isolation tube. The two ends of the isolation tube are respectively docked with the main wiring block and the secondary wiring block, and the isolation tube sleeves the first cold temperature sensing wire.

[0009] Furthermore, the hot surface testing device includes a product placement board, a first hot copper block, and a second hot copper block. The first hot copper block and the second hot copper block are respectively installed on the product placement board. The product placement board has a first product placement area and a second product placement area. The first hot copper block is located in the first product placement area, and the second hot copper block is located in the second product placement area. The first hot copper block is used to contact the hot surface of the product to be tested, and the second hot copper block is used to contact the hot surface of the non-test product. The temperature difference testing assembly includes a first thermal temperature sensor wire, and the first thermal temperature sensor wire is assembled and electrically connected to the first hot copper block. The hot surface testing device includes a water-cooled plate. The product placement board is assembled with the water-cooled plate in a stacked manner. The first hot copper block is in contact with the water-cooled plate. The water-cooled plate is used to adjust the temperature of the first hot copper block and the hot surface temperature of the product to be tested.

[0010] Furthermore, the refrigerating capacity testing assembly includes a primary testing module, a secondary testing module, and a second cold temperature sensor wire. The second cold temperature sensor wire passes through the secondary testing module and extends to be assembled and connected with the primary testing module. The primary testing module and the secondary testing module are arranged in series through the second cold temperature sensor wire. The hot surface testing device includes a third product placement area and a fourth product placement area. The third product placement area is used to place the product to be tested, and the fourth product placement area is used to place the non-test product. The primary testing module corresponds to the third product placement area vertically, and the secondary testing module corresponds to the fourth product placement area vertically. The second cold temperature sensor wire is used to detect the cold surface temperature of the product to be tested and the cold surface temperature of the non-test product.

[0011] Furthermore, the primary testing module includes a primary insulation block, a primary heater, a primary wiring block, and a primary copper block. The primary insulation block is used for insulation and heat insulation. Along the vertical direction from top to bottom, the primary insulation block, the primary heater, the primary wiring block, and the primary copper block are assembled in a stacked manner in sequence. The primary insulation block is assembled with the pressing device. The primary wiring block is used for the first cold temperature sensor wire to be assembled. The primary copper block is used to contact the cold surface of the product to be tested. The primary heater is used to generate heat and conduct it to the primary copper block.

[0012] Furthermore, the hot surface testing device includes a product placement board, a third hot copper block, and a fourth hot copper block. The third hot copper block and the fourth hot copper block are respectively installed on the product placement board. The product placement board has a third product placement area and a fourth product placement area. The third hot copper block is located in the third product placement area, and the fourth hot copper block is located in the fourth product placement area. The third hot copper block is used to contact the hot surface of the product to be tested, and the fourth hot copper block is used to contact the hot surface of the non-test product. The temperature difference testing assembly includes a second thermal temperature sensor wire, and the second thermal temperature sensor wire is assembled and electrically connected to the third hot copper block.

[0013] Furthermore, the performance testing equipment for the thermoelectric device includes a vacuum device, which includes a lifting cylinder, a shield member, a bell jar member, and a vacuum module. The lifting cylinder, the shield member, and the bell jar member are assembled in sequence. The lifting cylinder is used to drive the shield member to rise or fall. The shield member is used to apply a downward pressure to the bell jar member. The bell jar member has a bell jar cavity. The downward pressing device, the cold surface testing device, and the hot surface testing device are respectively located in the bell jar cavity. The vacuum module is used to make the bell jar cavity in a vacuum state.

[0014] 9. A method for testing the performance of a thermoelectric device, which includes a downward pressing device, a cold surface testing device, a hot surface testing device, and a vacuum device. The specific steps are as follows: (1) Load two products to be tested and two non-test products onto the hot surface testing device respectively. Apply a liquid metal layer to the hot surface of the product to be tested, and apply a thermal conductive silicone grease layer to the cold surface of the product to be tested. (2) Start the vacuum device to make the testing space in a vacuum state. (3) Start the downward pressing device to drive the cold surface testing device to move downward until the cold surface testing device is in contact with the cold surface of the product to be tested and the cold surface of the non-test product simultaneously, and the cold surface testing device applies a downward pressure to the product to be tested and the non-test product. (4) Both the product to be tested and the non-test product are in an energized state. Collect the cold surface temperature and hot surface temperature of the two products to be tested and the cold surface temperature and hot surface temperature of the two non-test products through different temperature sensing wires respectively. The temperature difference test is based on the temperature difference between the hot surface temperature and the cold surface temperature of the product to be tested. The cooling capacity test is based on recording the voltage and current when the hot surface temperature of the product to be tested is equal to the cold surface temperature to obtain the maximum cooling capacity of the product to be tested.

[0015] Further, one product to be tested and one non-test product are used for temperature difference testing, and another product to be tested and another non-test product are used for refrigerating capacity testing; the hot surface testing device includes a first product placement area, a second product placement area, a third product placement area, and a fourth product placement area. The first product placement area and the third product placement area are respectively used for placing products to be tested, and the second product placement area and the fourth product placement area are respectively used for placing non-test products; the cold surface testing device includes a main measurement module, an auxiliary measurement module, a first measurement module, and a second measurement module. The main measurement module corresponds to the first product placement area vertically, the auxiliary measurement module corresponds to the second product placement area vertically, the first measurement module corresponds to the third product placement area vertically, and the second measurement module corresponds to the fourth product placement area vertically; a temperature sensing wire passes through the auxiliary measurement module and extends to be assembled and connected with the main measurement module, and the main measurement module and the auxiliary measurement module are arranged in series through the temperature sensing wire. The temperature sensing wire passes through the second measurement module and extends to be assembled and connected with the first measurement module, and the first measurement module and the second measurement module are arranged in series through the temperature sensing wire.

[0016] Compared with the prior art, when testing the performance testing equipment and testing method of the thermoelectric device provided by the present invention, during testing, the product is loaded onto the hot surface testing device, and the hot surface of the product is in contact with the hot surface testing device. The pressing device drives the cold surface testing device to move downward to be in contact with the cold surface of the product. Then, synchronous testing is carried out through the temperature difference testing assembly and the refrigerating capacity testing assembly. The temperature difference testing assembly takes the temperature difference between the hot surface temperature and the cold surface temperature of the product as the temperature difference, and the refrigerating capacity testing assembly records the voltage and current when the hot surface temperature is equal to the cold surface temperature to obtain the maximum refrigerating capacity of the product to be tested; in this way, automated testing reduces labor input and saves costs. At the same time, the testing accuracy is improved, and synchronous testing of temperature difference testing and refrigerating capacity testing is satisfied, improving the testing efficiency and meeting multiple testing requirements. Description of the Drawings

[0017] Figure 1 is a perspective schematic diagram of the performance testing equipment of the thermoelectric device provided by the present invention; Figure 2 is a front view schematic diagram of the performance testing equipment of the thermoelectric device provided by the present invention; Figure 3 is a perspective schematic diagram of the main measurement module of the performance testing equipment of the thermoelectric device provided by the present invention; Figure 4 is a top view schematic diagram of the water cooling plate of the performance testing equipment of the thermoelectric device provided by the present invention; Figure 5 is a perspective schematic diagram of the product placement plate of the performance testing equipment of the thermoelectric device provided by the present invention; Figure 6 is an enlarged schematic diagram of the first product placement area of the performance testing equipment of the thermoelectric device provided by the present invention; Figure 7 It is a layout schematic diagram of the vacuum device of the thermoelectric device performance testing equipment provided by the present invention; Figure 8 It is a three-dimensional schematic diagram of the first test module of the thermoelectric device performance testing equipment provided by the present invention; Figure 9 It is a flowchart schematic diagram of the thermoelectric device performance testing method provided by the present invention. Specific Embodiments

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The implementation of the present invention will be described in detail below in conjunction with specific embodiments.

[0020] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] Referring to Figures 1-9 as shown, it is a preferred embodiment provided by the present invention.

[0022] The thermoelectric device performance testing equipment includes a downward pressing device 2, a cold surface testing device 1 and a hot surface testing device 3. The cold surface testing device 1 is installed on the downward pressing device 2, and the downward pressing device 2 is used to drive the cold surface testing device 1 to move up or down. The cold surface testing device 1 and the hot surface testing device 3 are arranged in a vertically corresponding manner; the cold surface testing device 1 includes a temperature difference testing assembly and a refrigerating capacity testing assembly. The temperature difference testing assembly and the refrigerating capacity testing assembly are respectively used to contact the cold surfaces of different products and monitor the cold surface temperatures. The hot surface testing device 3 is used to place multiple products, and the hot surface testing device 3 is used to contact the hot surfaces of different products and monitor the hot surface temperatures.

[0023] When the above-mentioned thermoelectric device performance testing equipment is used for testing, the product is loaded onto the hot surface testing device 3, and the hot surface of the product is in contact with the hot surface testing device 3. The pressing device 2 drives the cold surface testing device 1 to move downward until it is in contact with the cold surface of the product. Then, the temperature difference testing assembly and the refrigerating capacity testing assembly perform synchronous testing. The temperature difference testing assembly calculates the temperature difference based on the temperature difference between the hot surface temperature and the cold surface temperature of the product. The refrigerating capacity testing assembly records the voltage and current when the hot surface temperature is equal to the cold surface temperature to obtain the maximum refrigerating capacity of the product to be tested. In this way, automated testing reduces labor input and saves costs. At the same time, it improves the testing accuracy, and meets the synchronous testing of temperature difference testing and refrigerating capacity testing, improving the testing efficiency and meeting multiple testing requirements.

[0024] The temperature difference testing assembly includes a main testing module 11, a secondary testing module 12, and a first cold temperature sensing wire 13. The first cold temperature sensing wire 13 passes through the secondary testing module 12 and extends to be assembled and connected with the main testing module 11. The main testing module 11 and the secondary testing module 12 are arranged in series via the first cold temperature sensing wire 13. The hot surface testing device 3 includes a first product placement area 321 and a second product placement area 322. The first product placement area 321 is used to place the product to be tested, and the second product placement area 322 is used to place non-test products. The main testing module 11 is vertically corresponding to the first product placement area 321, and the secondary testing module 12 is vertically corresponding to the second product placement area 322. The first cold temperature sensing wire 13 is used to detect the cold surface temperature of the product to be tested and the cold surface temperature of the non-test product.

[0025] In this way, when performing temperature difference testing, through the cooperation of the main testing module 11, the secondary testing module 12, and the first cold temperature sensing wire 13, synchronous temperature difference testing is achieved in two areas, which plays a role in data comparison. At the same time, the exposed range of the first cold temperature sensing wire 13 is shortened, the heat absorption of the first cold temperature sensing wire 13 is reduced, and the testing accuracy is improved.

[0026] The first cold temperature sensing wire 13 is connected to a temperature sensor to extract the test data.

[0027] By using the cooperation of a single first cold temperature sensing wire 13 with the main testing module 11 and the secondary testing module 12, the cost is effectively reduced, and the testing error can also be reduced.

[0028] Since the temperature difference testing and the refrigerating capacity testing are carried out under vacuum conditions, it is impossible to directly collect the temperature of the cold surface of the product. Therefore, it is necessary to use the first cold temperature sensing wire 13 to collect the cold surface temperature. Moreover, the first cold temperature sensing wire 13 needs to be connected to a temperature sensor, so the layout length of the first cold temperature sensing wire 13 is relatively long. Therefore, the first cold temperature sensing wire 13 first passes through the secondary testing module 12 and then is connected to the main testing module 11, which can shorten the exposed range of the first cold temperature sensing wire 13, reduce the heat absorption of the first cold temperature sensing wire 13, and improve the testing accuracy.

[0029] The main test module 11 includes a main insulation block 111, a main wiring block 112, and a main copper block 113. The main insulation block 111 is used for insulation and heat insulation. Along the top-down direction, the main insulation block 111, the main wiring block 112, and the main copper block 113 are arranged in a stacked and assembled manner. The main insulation block 111 is assembled with the pressing device 2. The main wiring block 112 is used for the first cold temperature sensing wire 13 to be assembled. The main copper block 113 is used to contact the cold surface of the product to be tested.

[0030] In this way, under the action of the main insulation block 111, it plays an insulating and heat-insulating role, avoiding the influence of external temperature conduction on the test of the first cold temperature sensing wire 13 and improving the test accuracy of the first cold temperature sensing wire 13. Under the action of the main wiring block 112, the setting of the first cold temperature sensing wire 13 is realized. Under the action of the main copper block 113, the conduction of the cold surface temperature of the product is realized, facilitating the temperature collection of the first cold temperature sensing wire 13.

[0031] The main wiring block 112 is treated with nickel plating to improve the heat conduction effect, which helps to improve the test accuracy of the first cold temperature sensing wire 13.

[0032] A thermal conductive silicone grease layer is provided on the cold surface of the product. The thermal conductive silicone grease layer is arranged in a flat contact with the main copper block 113 to improve the heat conduction uniformity and effect.

[0033] The main test module 11 includes two main fixing rings 114. The two main fixing rings 114 are arranged corresponding to both ends. The main fixing rings 114 are used to synchronously sleeved the main insulation block 111, the main wiring block 112, and the main copper block 113, realizing the stacked and fixed arrangement of the main insulation block 111, the main wiring block 112, and the main copper block 113, facilitating heat conduction.

[0034] The main insulation block 111 has a main edge groove, which is arranged in a downward concave shape. The main copper block 113 has a main copper groove, which is arranged in an upward concave shape. Both ends of the main fixing ring 114 are respectively embedded in the main edge groove and the main copper groove, improving the assembly stability between the main insulation block 111, the main wiring block 112, and the main copper block 113.

[0035] The main test module 11 includes a main side shell 115 and a main side spring. The main side shell 115 is movably assembled with the main insulation block 111. One end of the main side spring is fixed, and the other end of the main side spring is arranged in butt joint with the main insulation block 111. The main side spring is used to apply an elastic force to the main insulation block 111. In this way, when the pressing device 2 prompts the main copper block 113 to contact the product, the main side spring synchronously applies an elastic force to the main insulation block 111, transmitting the force acting on the main copper block 113, making the contact between the main copper block 113 and the product more stable and avoiding the product being damaged due to excessive downward pressure.

[0036] The secondary measurement module 12 includes a secondary insulation block, a secondary wiring block, and a secondary copper block. The secondary insulation block is used for insulation and heat insulation. Along the top-down direction, the secondary insulation block, the secondary wiring block, and the secondary copper block are arranged in a stacked and assembled manner in sequence. The secondary insulation block is assembled with the pressing device 2. The first cold temperature sensing wire 13 passes through the secondary wiring block and extends through the main wiring block 112. The secondary copper block is used to contact the cold surface of the non-test product.

[0037] In this way, under the action of the secondary insulation block, it plays an insulating and heat-insulating role, avoiding the influence of external temperature conduction on the test of the first cold temperature sensing wire 13 and improving the test accuracy of the first cold temperature sensing wire 13; under the action of the secondary wiring block, the setting of the first cold temperature sensing wire 13 is realized. Under the action of the secondary copper block, the conduction of the cold surface temperature of the product is realized, facilitating the temperature collection of the first cold temperature sensing wire 13.

[0038] The temperature difference test assembly includes an isolation tube. The two ends of the isolation tube are respectively butted with the main wiring block 112 and the secondary wiring block, and the isolation tube sleeves the first cold temperature sensing wire 13.

[0039] Under the action of the isolation tube, the first cold temperature sensing wire 13 is prevented from being exposed, thereby avoiding the absorption of heat by the first cold temperature sensing wire 13 and improving the temperature collection accuracy of the first cold temperature sensing wire 13.

[0040] The bottom of the main wiring block 112 is arranged with an opening to form a bottom through groove, and the bottom through groove penetrates the bottom. The main copper block 113 covers the bottom through groove. The bottom through groove is used for the first cold temperature sensing wire 13. In this way, after the first cold temperature sensing wire 13 is set, the first cold temperature sensing wire 13 is arranged in a flat contact with the main copper block 113, facilitating the extraction of temperature data of the main copper block 113 by the first cold temperature sensing wire 13 and helping to improve the data extraction accuracy of the first cold temperature sensing wire 13.

[0041] The hot surface test device 3 includes a product placement board 32, a first hot copper block 325, and a second hot copper block 326. The first hot copper block 325 and the second hot copper block 326 are respectively installed on the product placement board 32. The product placement board 32 has a first product placement area 321 and a second product placement area 322. The first hot copper block 325 is located in the first product placement area 321, and the second hot copper block 326 is located in the second product placement area 322. The first hot copper block 325 is used to contact the hot surface of the product to be tested, and the second hot copper block 326 is used to contact the hot surface of the non-test product; the temperature difference test assembly includes a first hot temperature sensing wire, and the first hot temperature sensing wire is assembled and conductively arranged with the first hot copper block 325.

[0042] In this way, the hot surface temperature of the product to be tested is collected through the first hot temperature sensing wire to realize the temperature difference test.

[0043] The product placement board 32 has a first recessed groove 329 which is arranged to be recessed downward. The product to be tested includes a welding part which is arranged to protrude. The first recessed groove 329 is used for the welding part to be movably embedded therein. In this way, no extrusion of the welding part will be caused during the test, avoiding damage to the product due to pressing. At the same time, it plays a role in positioning and strengthening the feeding of the product.

[0044] The hot surface test device 3 includes a water-cooling plate 31. The product placement board 32 and the water-cooling plate 31 are assembled in a stacked manner. The first hot copper block 325 is arranged in contact with the water-cooling plate 31. The water-cooling plate 31 is used to adjust the temperature of the first hot copper block 325 and the hot surface temperature of the product to be tested. The water-cooling plate 31 can dissipate heat from the hot surface temperature of the product to be tested, thereby adjusting the temperature of the first hot copper block 325 and the hot surface temperature of the product to be tested.

[0045] In this way, when it is necessary to test the temperature difference test and cooling capacity test under a certain temperature state, such as 20 degrees, 25 degrees, etc., then the water-cooling plate 31 can be used to adjust the temperature of the first hot copper block 325 and the hot surface temperature of the product to be tested to tend to 20 degrees or 25 degrees, and then the temperature difference test and cooling capacity test are carried out to meet different test requirements.

[0046] The water-cooling plate 31 includes a water inlet pipe 311, a water outlet pipe 312 and a water-cooling pipe 313. The water-cooling pipe 313 is arranged in a meandering shape, and both ends of the water-cooling pipe 313 are respectively butt-jointed and communicated with the water inlet pipe 311 and the water outlet pipe 312. In this way, the temperature of the first hot copper block 325 or the hot surface temperature of the product to be tested is adjusted through the water-cooling pipe 313.

[0047] The cooling capacity test assembly includes a first test module 14, a second test module 15 and a second cold temperature sensing wire 16. The second cold temperature sensing wire 16 penetrates through the second test module 15 and extends to be assembled and communicated with the first test module 14. The first test module 14 and the second test module 15 are arranged in series through the second cold temperature sensing wire 16. The hot surface test device 3 includes a third product placement area 323 and a fourth product placement area 324. The third product placement area 323 is used to place the product to be tested, and the fourth product placement area 324 is used to place non-test products. The first test module 14 is vertically corresponding to the third product placement area 323, and the second test module 15 is vertically corresponding to the fourth product placement area 324. The second cold temperature sensing wire 16 is used to detect the cold surface temperature of the product to be tested and the cold surface temperature of the non-test product.

[0048] In this way, when performing the cooling capacity test, through the cooperation of the first test module 14, the second test module 15 and the second cold temperature sensing wire 16, the cooling capacity test is carried out synchronously in two areas, playing a role in data comparison. At the same time, the exposed range of the second cold temperature sensing wire 16 is shortened, the heat absorbed by the second cold temperature sensing wire 16 is reduced, and the test accuracy is improved.

[0049] The first test module 14 includes a first insulating block 141, a first heater 142, a first wiring block 143, and a first copper block 144. The first insulating block 141 is used for insulation and heat insulation. Along the top-down direction, the first insulating block 141, the first heater 142, the first wiring block 143, and the first copper block 144 are arranged in a stacked and assembled manner in sequence. The first insulating block 141 is assembled with the pressing device 2. The first wiring block 143 is used for the first cold temperature sensing wire 13 to be assembled. The first copper block 144 is used to contact the cold surface of the product to be tested. The first heater 142 is used to generate heat and conduct it to the first copper block 144.

[0050] In this way, under the action of the first main insulating block 111, it plays an insulating and heat-insulating role, avoiding the influence of external temperature conduction on the test of the second cold temperature sensing wire 16 and improving the test accuracy of the second cold temperature sensing wire 16; under the action of the first wiring block 143, the second cold temperature sensing wire 16 is set. Under the action of the first copper block 144, the conduction of the cold surface temperature of the product is realized, facilitating the temperature collection of the second cold temperature sensing wire 16. Under the action of the first heater 142, the cold surface of the product can be heated. When the temperature difference between the cold surface temperature and the hot surface temperature is 0, the cooling capacity can be obtained.

[0051] The hot surface test device 3 includes a product placement plate 32, a third hot copper block 327, and a fourth hot copper block 328. The third hot copper block 327 and the fourth hot copper block 328 are respectively installed on the product placement plate 32. The product placement plate 32 has a third product placement area 323 and a fourth product placement area 324. The third hot copper block 327 is located in the third product placement area 323, and the fourth hot copper block 328 is located in the fourth product placement area 324. The third hot copper block 327 is used to contact the hot surface of the product to be tested, and the fourth hot copper block 328 is used to contact the hot surface of the non-test product; the temperature difference test assembly includes a second hot temperature sensing wire, and the second hot temperature sensing wire is assembled and conductively arranged with the third hot copper block 327.

[0052] In this way, the hot surface temperature of the product to be tested is collected through the second hot temperature sensing wire. When the hot surface temperature is equal to the cold surface temperature, the voltage and current are recorded to obtain the maximum cooling capacity of the product to be tested.

[0053] The thermoelectric device performance test equipment includes a vacuum device 4. The vacuum device 4 includes a lifting cylinder 41, a shield member 42, a bell jar member 43, and a vacuum module 44. The lifting cylinder 41, the shield member 42, and the bell jar member 43 are assembled in sequence. The lifting cylinder 41 is used to drive the shield member 42 to rise or fall. The shield member 42 is used to apply a downward pressure to the bell jar member 43. The bell jar member 43 has a bell jar cavity. The pressing device 2, the cold surface test device 1, and the hot surface test device 3 are respectively located in the bell jar cavity. The vacuum module 44 is used to make the bell jar cavity in a vacuum state.

[0054] In this way, the temperature difference test and the cooling capacity test are carried out in a vacuum environment, reducing the influence of other factors on the test results and improving the test accuracy.

[0055] Thermoelectric device performance testing method, including a pressing device 2, a cold surface testing device 1, a hot surface testing device 3 and a vacuum device 4. The specific steps are as follows: (1) Load two products to be tested and two non-test products onto the hot surface testing device 3 respectively. Apply a liquid metal layer to the hot surface of the product to be tested, and apply a thermal conductive silicone grease layer to the cold surface of the product to be tested; (2) Start the vacuum device 4 to make the test space in a vacuum state; (3) Start the pressing device 2 to drive the cold surface testing device 1 to move downward until the cold surface testing device 1 is in contact with the cold surfaces of the products to be tested and the non-test products simultaneously, and the cold surface testing device 1 applies a downward pressure to the products to be tested and the non-test products; (4) The products to be tested and the non-test products are both in an energized state. Collect the cold surface temperatures and hot surface temperatures of the two products to be tested and the cold surface temperatures and hot surface temperatures of the two non-test products through different temperature sensing wires respectively. The temperature difference test is based on the temperature difference between the hot surface temperature and the cold surface temperature of the product to be tested. The cooling capacity test is based on recording the voltage and current when the hot surface temperature of the product to be tested is equal to the cold surface temperature to obtain the maximum cooling capacity of the product to be tested.

[0056] The above thermoelectric device performance testing method is an automated test, which reduces labor input and saves costs. At the same time, it improves the test accuracy, and meets the synchronous testing of temperature difference test and cooling capacity test, improves the test efficiency and also meets multiple test requirements.

[0057] One product to be tested and one non-test product are used for the temperature difference test, and the other product to be tested and the other non-test product are used for the cooling capacity test; the hot surface testing device 3 includes a first product placement area 321, a second product placement area 322, a third product placement area 323 and a fourth product placement area 324. The first product placement area 321 and the third product placement area 323 are respectively used to place the products to be tested, and the second product placement area 322 and the fourth product placement area 324 are respectively used to place the non-test products; the cold surface testing device 1 includes a main test module 11, a secondary test module 12, a first test module 14 and a second test module 15. The main test module 11 corresponds to the first product placement area 321 up and down, the secondary test module 12 corresponds to the second product placement area 322 up and down, the first test module 14 corresponds to the third product placement area 323 up and down, and the second test module 15 corresponds to the fourth product placement area 324 up and down; the temperature sensing wire penetrates through the secondary test module 12 and extends to be assembled and connected with the main test module 11, and the main test module 11 and the secondary test module 12 are arranged in series through the temperature sensing wire. The temperature sensing wire penetrates through the second test module 15 and extends to be assembled and connected with the first test module 14, and the first test module 14 and the second test module 15 are arranged in series through the temperature sensing wire.

[0058] In this way, when performing the temperature difference test, through the cooperation of the main test module 11, the secondary test module 12 and the first cold temperature sensing line 13, the temperature difference test is synchronously carried out in two areas, which plays a role in data comparison. At the same time, the exposed range of the first cold temperature sensing line 13 is shortened, the heat absorption of the first cold temperature sensing line 13 is reduced, and the test accuracy is improved; when performing the refrigerating capacity test, through the cooperation of the first test module 14, the second test module 15 and the second cold temperature sensing line 16, the refrigerating capacity test is synchronously carried out in two areas, which plays a role in data comparison. At the same time, the exposed range of the second cold temperature sensing line 16 is shortened, the heat absorption of the second cold temperature sensing line 16 is reduced, and the test accuracy is improved.

[0059] The vacuum device 4 includes a lifting cylinder 41, a shield member 42, a bell jar member 43 and a vacuum module 44. The lifting cylinder 41, the shield member 42 and the bell jar member 43 are arranged in sequence. The lifting cylinder 41 is used to drive the shield member 42 to rise or fall. The shield member 42 is used to apply a downward pressure to the bell jar member 43. The bell jar member 43 has a bell jar cavity. The downward pressing device 2, the cold surface testing device 1 and the hot surface testing device 3 are respectively located in the bell jar cavity. The vacuum module 44 is used to make the bell jar cavity in a vacuum state.

[0060] In this way, the temperature difference test and the refrigerating capacity test are carried out in a vacuum environment, reducing the influence of other factors on the test results and improving the test accuracy.

[0061] The bell jar member 43 is arranged in a transparent shape, which is convenient for directly observing the test conditions of the temperature difference test and the refrigerating capacity test.

[0062] The upper part of the bell jar member 43 forms a bell jar head, and the bell jar head arches upward in an arc shape. The shield member 42 is arranged in a cylindrical shape. The lower part of the shield member 42 forms a shield part, and the shield part is recessed upward in an arc shape; when pressing, the shield part and the bell jar head are arranged in a flat contact manner, and the bell jar head is embedded in the shield part; in this way, the downward pressure of the shield member 42 on the bell jar member 43 is improved, the sealing performance of the bell jar member 43 is guaranteed, thereby enhancing the stability of the bell jar member 43 and making the force on the bell jar member 43 more uniform.

[0063] The method for testing the performance of a thermoelectric device includes a workbench and a carrier table. The carrier table is installed on the workbench, and the hot surface testing device 3 is vertically docked with the carrier table, and the assembly of the hot surface testing device 3 is realized through the carrier table.

[0064] The downward pressing device 2 is installed on the workbench to realize the assembly of the downward pressing device 2.

[0065] The workbench is provided with a sealing ring, and the sealing ring surrounds the downward pressing device 2. The bell jar member 43 is vertically corresponding to the sealing ring. During the test operation, the bell jar member 43 and the sealing ring are vertically pressed against each other. Under the action of the sealing ring, the sealing performance of the bell jar member 43 is improved, and the implementation of the vacuum environment is guaranteed.

[0066] The pressing device 2 includes a pressing cylinder, a lower pressing plate and a pressing lead screw. The pressing cylinder is used to drive the pressing lead screw to be rotationally arranged. The pressing lead screw penetrates through the lower pressing plate, and the pressing lead screw is used to drive the lower pressing plate to be arranged in a rising or falling manner. The main measurement module 11, the auxiliary measurement module 12, the first measurement module 14 and the second measurement module 15 are respectively arranged on the lower pressing plate. The lower pressing plate is used to synchronously drive the main measurement module 11, the auxiliary measurement module 12, the first measurement module 14 and the second measurement module 15 to be arranged in a rising or falling manner, realizing automatic control of the synchronous movement of the main measurement module 11, the auxiliary measurement module 12, the first measurement module 14 and the second measurement module 15, and realizing the contact with the products on the first product placement area 321, the second product placement area 322, the third product placement area 323 and the fourth product placement area 324, so as to realize the synchronous progress of the temperature difference test and the refrigerating capacity test.

[0067] When performing the temperature difference test or the refrigerating capacity test, a part of the energy is absorbed by the copper plate. Therefore, there is a certain error in the test result.

[0068] Through the calculation of the copper plate compensation, the energy absorbed by the copper plate is compensated back. In this way, the temperature will be closer to the true value, thus improving the accuracy of the performance test of the thermoelectric device.

[0069] The specific compensation calculation formula is as follows: Copper plate compensation K: a is the length of the hot surface, b is the width of the hot surface, a1 is the length of the cold surface, b1 is the width of the cold surface, c is the length of the test head, h1 is the height of the hot surface temperature sensing wire from the bottom surface of the copper plate, h2 is the height of the cold surface temperature sensing wire from the bottom surface of the copper plate, P is the power of the heating sheet, V is the voltage of the product without the wire, and I is the current measured by the product.

[0070] R1 = h1 / (400 * a * b), which is used to calculate the resistance of the hot surface copper plate.

[0071] R2 = h2 / (400 * AVERAGE(c, MIN(a1, c)) * AVERAGE(c, MIN(b1, c))), which is used to calculate the resistance of the cold surface copper plate.

[0072] Hot K = (P + V * I) * R1, Cold K = -P * R2.

[0073] In this way, the accuracy of the performance test of the thermoelectric device is improved, the accuracy of the temperature difference test is provided, and the accuracy of the refrigerating capacity test is improved.

[0074] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A performance testing device for a thermoelectric device, characterized in that, It includes a pressing device, a cold surface testing device, and a hot surface testing device. The cold surface testing device is installed on the pressing device, and the pressing device is used to drive the cold surface testing device to rise or fall. The cold surface testing device and the hot surface testing device are arranged vertically corresponding to each other. The cold surface testing device includes a temperature difference testing assembly and a refrigerating capacity testing assembly. The temperature difference testing assembly and the refrigerating capacity testing assembly are respectively used to contact the cold surfaces of different products and monitor the cold surface temperatures. The hot surface testing device is used to place multiple products, and the hot surface testing device is used to contact the hot surfaces of different products and monitor the hot surface temperatures.

2. The performance testing device for a thermoelectric device according to claim 1, characterized in that, The temperature difference testing assembly includes a main testing module, a sub-testing module, and a first cold temperature sensing wire. The first cold temperature sensing wire extends through the sub-testing module and is assembled and connected to the main testing module. The main testing module and the sub-testing module are arranged in series through the first cold temperature sensing wire. The hot surface testing device includes a first product placement area and a second product placement area. The first product placement area is used to place products to be tested, and the second product placement area is used to place non-tested products. The main testing module and the first product placement area are vertically corresponding to each other, and the sub-testing module and the second product placement area are vertically corresponding to each other. The first cold temperature sensing wire is used to detect the cold surface temperatures of products to be tested and non-tested products.

3. The performance testing device for the thermoelectric device according to claim 2, characterized in that, The main testing module includes a main insulating block, a main wiring block, and a main copper block. The main insulating block is used for insulation and heat insulation. Along the vertical direction from top to bottom, the main insulating block, the main wiring block, and the main copper block are stacked and assembled in sequence. The main insulating block is assembled with the pressing device. The main wiring block is used for the assembly of the first cold temperature sensing wire. The main copper block is used to contact the cold surface of the product to be tested. The sub-testing module includes a sub-insulating block, a sub-wiring block, and a sub-copper block. The sub-insulating block is used for insulation and heat insulation. Along the vertical direction from top to bottom, the sub-insulating block, the sub-wiring block, and the sub-copper block are stacked and assembled in sequence. The sub-insulating block is assembled with the pressing device. The first cold temperature sensing wire extends through the sub-wiring block and passes through the main wiring block. The sub-copper block is used to contact the cold surface of the non-tested product. The temperature difference testing assembly includes an isolation tube. The two ends of the isolation tube are respectively docked with the main wiring block and the sub-wiring block, and the isolation tube sleevs the first cold temperature sensing wire.

4. The performance testing device for a thermoelectric device according to claim 2, wherein, The hot surface testing device includes a product placement board, a first hot copper block, and a second hot copper block. The first hot copper block and the second hot copper block are respectively installed on the product placement board. The product placement board has a first product placement area and a second product placement area. The first hot copper block is located in the first product placement area, and the second hot copper block is located in the second product placement area. The first hot copper block is used to contact the hot surface of the product to be tested, and the second hot copper block is used to contact the hot surface of the non-tested product; the temperature difference testing assembly includes a first thermal temperature sensor wire, and the first thermal temperature sensor wire is assembled and conductively arranged with the first hot copper block; the hot surface testing device includes a water-cooled plate, the product placement board is assembled in a stacked manner with the water-cooled plate, the first hot copper block is in contact with the water-cooled plate, and the water-cooled plate is used to adjust the temperature of the first hot copper block and the hot surface temperature of the product to be tested.

5. The performance testing device for a thermoelectric device according to any one of claims 1-4, characterized in that The refrigerating capacity testing assembly includes a first testing module, a second testing module, and a second cold temperature sensor wire. The second cold temperature sensor wire passes through the second testing module and extends to be assembled and connected with the first testing module. The first testing module and the second testing module are arranged in series via the second cold temperature sensor wire. The hot surface testing device includes a third product placement area and a fourth product placement area. The third product placement area is used to place the product to be tested, and the fourth product placement area is used to place the non-tested product. The first testing module corresponds to the third product placement area vertically, and the second testing module corresponds to the fourth product placement area vertically. The second cold temperature sensor wire is used to detect the cold surface temperature of the product to be tested and the cold surface temperature of the non-tested product.

6. The performance testing device for a thermoelectric device according to claim 5, characterized in that, The first testing module includes a first insulating block, a first heater, a first wiring block, and a first copper block. The first insulating block is used for insulation and heat insulation. In the vertical downward direction, the first insulating block, the first heater, the first wiring block, and the first copper block are assembled in a stacked manner in sequence. The first insulating block is assembled with the pressing device. The first wiring block is used for the first cold temperature sensor wire to be assembled. The first copper block is used to contact the cold surface of the product to be tested, and the first heater is used to generate heat and conduct it to the first copper block.

7. The performance testing device for a thermoelectric device according to claim 5, characterized in that The hot surface testing device includes a product placement board, a third hot copper block, and a fourth hot copper block. The third hot copper block and the fourth hot copper block are respectively installed on the product placement board. The product placement board has a third product placement area and a fourth product placement area. The third hot copper block is located in the third product placement area, and the fourth hot copper block is located in the fourth product placement area. The third hot copper block is used to contact the hot surface of the product to be tested, and the fourth hot copper block is used to contact the hot surface of the non-tested product; the temperature difference testing assembly includes a second thermal temperature sensor wire, and the second thermal temperature sensor wire is assembled and conductively arranged with the third hot copper block.

8. The performance testing device for a thermoelectric device according to any one of claims 1-4, characterized in that, The performance testing equipment for the thermoelectric device includes a vacuum device, which includes a lifting cylinder, a shield member, a bell jar member, and a vacuum module. The lifting cylinder, the shield member, and the bell jar member are assembled in sequence. The lifting cylinder is used to drive the shield member to rise or fall. The shield member is used to apply a downward pressure to the bell jar member. The bell jar member has a bell jar cavity. The downward pressure device, the cold surface testing device, and the hot surface testing device are respectively located in the bell jar cavity. The vacuum module is used to make the bell jar cavity in a vacuum state.

9. A method for testing the performance of a thermoelectric device, characterized in that, It includes a downward pressure device, a cold surface testing device, a hot surface testing device, and a vacuum device. The specific steps are as follows: (1) Load two products to be tested and two non-test products onto the hot surface testing device respectively. Apply a liquid metal layer to the hot surface of the product to be tested, and apply a thermal conductive silicone grease layer to the cold surface of the product to be tested. (2) Start the vacuum device to make the test space in a vacuum state. (3) Start the downward pressure device to drive the cold surface testing device to move downward until the cold surface testing device is in contact with the cold surfaces of the products to be tested and the non-test products simultaneously, and the cold surface testing device applies a downward pressure to the products to be tested and the non-test products. (4) The products to be tested and the non-test products are both in an energized state. Collect the cold surface temperatures and hot surface temperatures of the two products to be tested and the cold surface temperatures and hot surface temperatures of the two non-test products through different temperature sensing wires respectively. The temperature difference test is based on the temperature difference between the hot surface temperature and the cold surface temperature of the product to be tested. The cooling capacity test is based on recording the voltage and current when the hot surface temperature of the product to be tested is equal to the cold surface temperature to obtain the maximum cooling capacity of the product to be tested.

10. The performance testing method of the thermoelectric device according to claim 9, characterized in that, One product to be tested and one non-test product are used for the temperature difference test, and the other product to be tested and the other non-test product are used for the cooling capacity test. The hot surface testing device includes a first product placement area, a second product placement area, a third product placement area, and a fourth product placement area. The first product placement area and the third product placement area are respectively used to place the products to be tested, and the second product placement area and the fourth product placement area are respectively used to place the non-test products. The cold surface testing device includes a main testing module, a secondary testing module, a first testing module, and a second testing module. The main testing module corresponds to the first product placement area vertically, the secondary testing module corresponds to the second product placement area vertically, the first testing module corresponds to the third product placement area vertically, and the second testing module corresponds to the fourth product placement area vertically. The temperature sensing wire passes through the secondary testing module and extends to be assembled and connected with the main testing module. The main testing module and the secondary testing module are arranged in series through the temperature sensing wire. The temperature sensing wire passes through the second testing module and extends to be assembled and connected with the first testing module. The first testing module and the second testing module are arranged in series through the temperature sensing wire.

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