Clamp for testing high-temperature service life of plug-in type platinum film thermosensitive resistor

Abstract

The utility model discloses a high-temperature life test clamp for a plug-in type platinum film thermistor, and belongs to the field of resistor test. Comprising a pedestal, a terminal pedestal, a product pedestal, an electrode wire holder, a fastening terminal seat and a separation blade. The middle of the base is a flat plate, and the two ends of the base are plate feet. The terminal bases are installed at the two ends of the base flat plate. Two ends of the product pedestal are respectively installed on the terminal pedestals at two ends of the flat plate. The electrode wire holders are installed at the two ends of the product base. The fastening terminal seats are symmetrically arranged in two rows in parallel, all the fastening terminal seats in each row are electrically connected, and the two ends of the fastening terminal seats are connected with the corresponding electrode wire holders; and a platinum resistor placing position is arranged between the two rows. And the separation blade 6 is arranged below the terminal fixing seat 5. The problems of destructive test damage, poor batch productbility, poor quality consistency and low reliability caused by the fact that high-temperature-resistant brazing needs to be carried out in an existing high-temperature reliability verification technology are solved. The device is widely applied to the technical field of high-temperature life testing of plug-in type platinum film thermistors.

Description

Technical Field

[0001] The utility model belongs to the field of resistor testing, and further relates to the field of high-temperature thermistor testing, and specifically relates to a plug-in type platinum thin film thermistor high-temperature life test fixture. Background Art

[0002] Before electronic components are released to the market, their reliability must be verified. High-temperature electrical life testing is a key component of device reliability verification, as it assesses the device's long-term service life in high-temperature environments. Existing plug-in platinum thin-film thermistors (PtRs), such as the MZBB type produced by China Zhenhua Group Yunke Electronics Co., Ltd., operate at temperatures as high as 400°C. Therefore, reliability verification requires a 1000-hour temperature hold at 400°C to test the resistance drift of the PtRs.

[0003] The traditional high-temperature electrical life test method involves soldering high-temperature wires to the two electrodes of a platinum resistor. After connecting a constant current source meter, the product is placed in a constant-temperature oven for insulation. However, due to the product's insulation temperature reaching 400°C, soldering cannot be used; brazing, which is resistant to high temperatures, is required. This presents numerous inconveniences. For example: 1. Strict welding conditions are required, and improper welding techniques can affect the performance of the platinum resistor itself. 2. Resistance tests must be performed before and after welding to compare the resistance offset after the high-temperature electrical life test. After the brazed product is finished, it must be desoldered. This process is cumbersome and cannot guarantee that the product will not be damaged during handling. Furthermore, residual solder can affect the accuracy of the platinum resistor test, making it a destructive test. 3. Since each product is soldered and tested individually, multiple tests cannot be performed simultaneously. This is not only inefficient but also unrepresentative and fails to reflect the performance of the entire batch.

[0004] In view of this, the present utility model is proposed. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to solve the problem that in the existing high-temperature reliability verification technology, high-temperature electrical life testing of high-temperature thermistors requires high-temperature resistant brazing, which causes destructive test damage, poor batch productivity, poor quality consistency and low reliability.

[0006] To this end, the utility model provides a plug-in type platinum thin film thermistor high temperature life test fixture, such as Figure 1 shown.

[0007] It includes a base 1, a terminal base 2, a product base 3, an electrode terminal base 4, a fastening terminal base 5, and a baffle 6.

[0008] The base 1 is located at the bottom layer of the fixture, with a flat plate in the middle and plate feet at both ends.

[0009] The terminal base 2 is installed at both ends of the flat plate of the base 1.

[0010] The product base 3 is rectangular, and its two ends are respectively mounted on the terminal bases 2 at the two ends of the flat plate.

[0011] The electrode terminal blocks 4 are installed at both ends of the product base 3 .

[0012] At least one fastening terminal block 5 is installed along the length of the top surface of the product base 3, arranged in two parallel and symmetrical rows. Each row of fastening terminal blocks 5 is fully electrically connected, and both ends of each row of fastening terminal blocks 5 are connected to the corresponding electrode terminal blocks 4. Between the two rows of fastening terminal blocks 5 is the placement of the platinum resistor 7, used to secure the two leads of the platinum resistor to the fastening terminal blocks.

[0013] The blocking piece 6 is installed below the fixed terminal seat 5 to further fix the platinum resistor.

[0014] Technical effects of this utility model:

[0015] 1. The high-temperature life test fixture designed by this utility model is equipped with multiple test stations, each of which is connected in parallel, which can meet the needs of multiple products for high-temperature life tests at the same time, greatly improving the test efficiency. At the same time, it can effectively conduct unified and standardized tests on products, effectively avoiding external factors that affect product test results during welding, and ensuring the consistency and stability of the test.

[0016] 2. Compared with the welding method, this fixture product can quickly raise and lower the fixture to perform stage time testing, accumulate test data at different time points, and the product can continue to be used after the test, which is a non-destructive test.

[0017] 3. Place the product base on the base and terminal base through physical connection to ensure that there is no short circuit when the high temperature test device is placed in the heat treatment box during the test.

[0018] 4. This utility model is suitable for large-scale testing, with good batch productivity, good quality consistency and high reliability.

[0019] The utility model can be widely applied to the technical field of high-temperature life testing of plug-in type platinum thin film thermistors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the high-temperature life test fixture for plug-in platinum thin film thermistors.

[0021] In the figure: 1 is the base, 2 is the terminal base, 3 is the product base, 4 is the electrode terminal block, 5 is the fastening terminal block, 6 is the baffle, and 7 is the platinum resistor. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, the plug-in type platinum thin film thermistor high temperature life test fixture is specifically implemented as follows:

[0023] The base 1 and the terminal base 2 are both made of high-temperature resistant insulating materials, preferably ceramic materials or glass materials, so that the high-temperature life test device can withstand high temperatures of 400°C and above.

[0024] The electrode terminal block 4 is connected to a high-temperature wire, and the high-temperature wire is connected to a constant current power supply.

[0025] Working principle:

[0026] First, test the resistance of the platinum resistor at 0℃ in a constant temperature bath. Then, fix the two leads of the platinum resistor 7 on the fastening terminal block 5 respectively, put it into a heat treatment box, wait until the temperature reaches 400℃, turn on the power meter, output the rated current, and keep it warm for 1000 hours. Then take out the fixture, remove the platinum resistor with tweezers, and test the resistance at 0℃ again in the constant temperature bath. By comparing the resistance at 0℃ before and after the test, observe the resistance offset after the high-temperature electrical life test.

[0027] The structural design of this embodiment is simple. The baffle and the fastening terminal seat are used together to firmly hold the platinum resistor, allowing the platinum resistor to undergo high-temperature life tests in a heat treatment box. The utility model is lightweight and durable, can completely replace traditional welding methods and ensure that the product is not affected by external physical factors.

[0028] Finally, it should be noted that the above embodiments are merely examples for clarity of explanation. The present invention includes, but is not limited to, the above embodiments. An exhaustive list of all possible implementations is not necessary and cannot be provided here. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. Any implementation that meets the requirements of this utility model falls within its scope of protection.

Claims

1. A plug-in platinum thin film thermistor high temperature life test fixture, characterized by: Including base, terminal base, product base, electrode terminal block, fastening terminal block, baffle; The base is located at the bottom of the fixture, with a flat plate in the middle and plate feet at both ends; The terminal base is installed at both ends of the base plate; The product base is rectangular, with both ends mounted on the terminal bases at both ends of the flat plate; The electrode terminal blocks are installed at both ends of the product base; There are one or more fastening terminal blocks installed on both sides of the top surface of the product base along the length direction, arranged in two parallel and symmetrical rows; each row of fastening terminal blocks is fully electrically connected, and both ends of each row of fastening terminal blocks are connected to the corresponding electrode terminal blocks; between the two rows of fastening terminal blocks is the placement position of the platinum resistor; The baffle is installed below the fixed terminal seat to further fix the platinum resistor.

2. The plug-in type platinum thin film thermistor high temperature life test fixture according to claim 1, characterized in that: The electrode terminal block is connected to a high-temperature wire, and the high-temperature wire is connected to a constant-current power supply meter.

3. The plug-in type platinum thin film thermistor high temperature life test fixture according to claim 2, characterized in that: The high-temperature wire is connected to a constant current power supply.

4. The high-temperature life test fixture for a plug-in platinum thin film thermistor according to claim 1, characterized in that: The base and the terminal base are made of high-temperature resistant insulating material.

5. The plug-in type platinum thin film thermistor high temperature life test fixture according to claim 4, characterized in that: The insulating material is a ceramic material or a glass material.

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