A temperature control device and testing fixture for power module testing

Abstract

This utility model provides a temperature control device and testing fixture for power module testing, comprising: a base, on which multiple temperature converters are disposed on the inner side facing the power module, the temperature converters being used to transfer heat to the power module through the base; slide rails located on both sides of the base, the slide rails extending along the length of the base; a snap-fit ​​assembly connected to the slide rails, used to slide along the slide rails and contact the power module to fix the power module; and a heat-conducting component located on the side of the snap-fit ​​assembly near the power module, connected to the temperature converters, used to transfer heat from the temperature converters to the power module. This utility model embodiment can uniformly control the heat received by the power module and improve testing accuracy.

Description

Technical Field

[0001] This utility model relates to the field of power module testing technology, and in particular to a temperature control device and a testing fixture for power module testing. Background Technology

[0002] An Intelligent Power Module (IPM) is a high-performance power electronic device that integrates power devices (such as IGBTs and MOSFETs), drive circuits, and protection circuits. Due to its high integration, high efficiency, and high reliability, IPM modules are widely used in new energy vehicles, industrial frequency converters, servo drives, and home appliance control. Testing intelligent power modules often requires simulating the temperature of their operating environment. However, current testing equipment suffers from poor heating uniformity, resulting in low test accuracy and a lack of versatility, leading to low testing efficiency. Utility Model Content

[0003] In view of the above problems, this utility model is proposed to provide a temperature control device and a testing fixture for power module testing that overcomes or at least partially solves the above problems.

[0004] To address the aforementioned problems, in a first aspect, this utility model discloses a temperature control device for power module testing, comprising:

[0005] A base, on the inner side of the base facing the power module, is provided with multiple temperature converters, which are used to transfer heat to the power module through the base;

[0006] Slide rails are located on both sides of the base and extend along the length of the base;

[0007] A snap-fit ​​assembly is connected to the slide rail and is used to slide along the slide rail, contact the power module, and fix the power module.

[0008] A heat-conducting component is located on the side of the snap-fit ​​assembly near the power module and is connected to the temperature converter to transfer heat from the temperature converter to the power module.

[0009] Optionally, the snap-fit ​​assembly includes:

[0010] A slider, connected to the slide rail, is used to slide along the slide rail;

[0011] An elastic arm, connected to the slider, is used to contact the side of the power module;

[0012] The claw buckle is attached to the side of the elastic arm near the power module and is used to contact the bottom of the power module.

[0013] Optionally, the snap-fit ​​assembly includes:

[0014] A locking element, connected to the elastic arm, is used to limit the range of motion of the elastic arm in the locked state.

[0015] Optionally, the snap-fit ​​assembly includes:

[0016] Anti-slip components are provided on the side of the elastic arm near the power module, and / or on the side of the claw buckle near the power module.

[0017] Optionally, the snap-fit ​​assembly includes:

[0018] A flexible component is disposed on the side of the elastic arm near the power module.

[0019] Optionally, the slider and the elastic arm are connected by a quick-release structure.

[0020] Optionally, it also includes:

[0021] A temperature sensor is disposed on the side of the base near the power module and on the side of the latching assembly near the power module.

[0022] Optionally, the temperature sensor includes:

[0023] A type K thermocouple is disposed on the side of the base near the power module and on the side of the snap-fit ​​assembly near the power module.

[0024] Optionally, it also includes:

[0025] The light-emitting element is used to display a first color when the power module is fixed by the buckle assembly, and to display a second color when the power module is not fixed by the buckle assembly.

[0026] In a second aspect, this utility model discloses a testing fixture, including a temperature control device for testing power modules as described above.

[0027] This utility model has the following advantages:

[0028] This embodiment of the invention includes a base with multiple temperature converters arranged on the inner side of the base facing the power module. These temperature converters transfer heat to the power module through the base. A slide rail is located on both sides of the base and extends along its length. A latching assembly is connected to the slide rail and slides along it to contact and fix the power module. A heat-conducting element is located on the side of the latching assembly near the power module and connected to the temperature converters to transfer heat from the temperature converters to the power module. By providing multiple temperature converters on the inner side of the base facing the power module and a heat-conducting element on the side of the latching assembly near the power module, the power module can be temperature-controlled at multiple locations, resulting in uniform heating and improved testing accuracy. The sliding of the latching assembly on the slide rail creates different clamping lengths, accommodating power modules of various sizes, not limited to a single size. This makes the temperature control device versatile, allowing testing of multiple power modules within a single device, thus improving testing efficiency. Attached Figure Description

[0029] Figure 1 This is a top view of the structure of a temperature control device for testing a power module according to this utility model;

[0030] Figure 2 This is a front view of the structure of a temperature control device for testing a power module according to this utility model;

[0031] Figure 3 This is a side view of the structure of a temperature control device for testing a power module according to this utility model;

[0032] Figure 4 This is a bottom structural view of a temperature control device for testing a power module according to this utility model.

[0033] Explanation of reference numerals in the attached drawings: 100-base, 110-slide rail, 200-clamp assembly, 210-elastic arm, 220-claw buckle, 230-anti-slip component. Detailed Implementation

[0034] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] An Intelligent Power Module (IPM) is a high-performance power electronic device that integrates power devices (such as IGBTs and MOSFETs), drive circuits, and protection circuits. Due to its high integration, high efficiency, and high reliability, IPM modules are widely used in new energy vehicles, industrial frequency converters, servo drives, and home appliance control. In these applications, IPM modules typically need to operate for extended periods in high-temperature environments. For example, IPM modules in automotive electronic systems may need to operate at ambient temperatures exceeding 100°C. Therefore, their performance and reliability under high-temperature conditions are crucial indicators for evaluating module quality.

[0036] In the development and production of IPM modules, double-pulse testing is an important testing method. Double-pulse testing simulates the switching state during actual operation by applying a specific double-pulse signal to the module's input, thereby detecting the module's dynamic characteristics, such as switching speed, overshoot voltage, power loss, di / dt (current derivative), and dv / dt (voltage derivative). These parameters directly reflect the module's dynamic performance and reliability; therefore, the results of double-pulse testing are of great significance for the module's optimized design and quality control.

[0037] However, in practical applications, the performance of IPM modules is not only related to their inherent electrical characteristics but also closely related to the temperature of their operating environment. Temperature variations significantly affect key parameters of power devices such as on-resistance, switching speed, overshoot voltage, and power loss. For example, increased temperature can lead to a decrease in the on-resistance of IGBTs, but may simultaneously increase power loss and reduce switching speed. Therefore, simulating a high-temperature operating environment is crucial to ensuring the accuracy and reliability of test results during double-pulse testing.

[0038] Currently, existing dual-pulse testing devices and methods have the following problems and shortcomings in terms of temperature control:

[0039] 1. Insufficient temperature control accuracy

[0040] Traditional heating methods (such as resistance heating or air-cooled heating) suffer from insufficient precision in temperature control.

[0041] Large temperature fluctuations: The temperature control accuracy of heating devices is usually low, which causes the module to experience large temperature fluctuations during the test, thus affecting the stability of the test results.

[0042] Significant hysteresis effect: Due to the large thermal inertia of the heating device, the response speed of temperature regulation is slow, making it difficult to achieve rapid temperature control.

[0043] 2. Poor heating uniformity

[0044] In practical testing, the heating uniformity of the IPM module is crucial to its performance. However, existing heating devices have the following problems regarding heating uniformity:

[0045] Localized overheating or underheating: Due to unreasonable design of the heating device, some areas of the module may overheat, while other areas may be underheated, resulting in a large temperature gradient inside the module.

[0046] Uneven thermal stress: Uneven heating can lead to uneven thermal stress inside the module, which may negatively affect the module's packaging and reliability.

[0047] Unable to adapt to different packaging forms: Existing heating devices are usually designed for IPM modules with specific packaging forms, making it difficult to adapt to modules of different sizes and packaging forms, thus limiting their versatility.

[0048] 3. Testing cost and time issues

[0049] In industrial production, testing costs and time are also important considerations. However, existing testing equipment has the following problems in this regard:

[0050] High equipment maintenance costs: Traditional heating devices typically require frequent maintenance, increasing the operating costs of the testing system. Long testing cycles: Due to low heating efficiency and inaccurate temperature control, testing cycles are long, increasing production costs. Inability to meet batch testing needs: Existing heating devices struggle to support high-efficiency batch testing, limiting their application in large-scale production.

[0051] 4. Insufficient compatibility and scalability: As IPM module technology continues to develop, its packaging form and size are also constantly changing. However, existing heating devices have the following problems in terms of compatibility and scalability:

[0052] Poor adaptability: Existing heating devices are usually designed for specific models of IPM modules and are difficult to adapt to modules of different sizes and packaging forms.

[0053] Limited scalability: When multiple modules need to be tested, existing heating devices are difficult to adjust and adapt quickly, limiting their application range.

[0054] In order to at least solve some of the problems mentioned above, embodiments of this utility model are proposed.

[0055] Reference Figure 1 The diagram shows a top view of the structure of a temperature control device for testing a power module according to this utility model; see reference. Figure 2 The diagram shows a front view of the structure of a temperature control device for testing a power module according to this utility model; see reference to... Figure 3The diagram shows a structural side view of a temperature control device for testing a power module according to this utility model; see reference to... Figure 4 The diagram shows a bottom structural view of a temperature control device for power module testing according to this utility model; the temperature control device for power module testing may specifically include:

[0056] A base 100, on the inner side of the side facing the power module, is provided a plurality of temperature converters (not shown in the figure), which are used to transfer heat to the power module through the base 100;

[0057] Slide rails 110 are located on both sides of the base 100, and the slide rails 110 extend along the length direction of the base 100;

[0058] The snap-fit ​​assembly 200 is connected to the slide rail 110 and is used to slide along the slide rail 110, contact the power module, and fix the power module.

[0059] A heat-conducting component (not shown in the figure) is located on the side of the snap-fit ​​assembly 200 near the power module and is connected to the temperature converter to transfer heat from the temperature converter to the power module.

[0060] In this embodiment of the invention, the power module being tested is an Intelligent Power Module (IPM). The temperature control device for testing the power module can consist of a base 100, a slide rail 110, a snap-fit ​​assembly 200, a temperature converter, and a heat-conducting component. The base 100 serves as the supporting foundation, and the base 100, slide rail 110, snap-fit ​​assembly 200, temperature converter, and heat-conducting component can all be directly or indirectly connected to the base 100.

[0061] Multiple temperature controllers are provided on the inner side of the base 100 facing the power module, for example, such as Figure 1 As shown, multiple temperature controllers are installed on the inner side of the bottom surface of the base 100. These temperature controllers can cool or heat the power module, thus simulating the environment in which the power module operates. The temperature controllers transfer heat to the power module through the sides of the base 100. In one example, the base 100 can be made of aluminum alloy for better heat transfer. The base 100 can be machined from aluminum alloy using a CNC (Computer Numerical Control) machine tool to cut out the outer shell shape. A surface treatment such as painting or anodizing enhances corrosion resistance. Slide rails 110 are located on both sides of the base 100, as shown... Figure 1As shown, slide rails 110 are disposed on the front and rear sides of the base 100, extending along the length of the base 100. A latching assembly 200 can be connected to the slide rails 110. The latching assembly 200 can slide freely within the slide rails 110. As the latching assembly 200 slides along the slide rails 110, it adjusts its clamping length to contact the power module, fixing it in place so that the power module is tightly against the base 100 and subjected to heating or cooling by the temperature converter. A heat-conducting element is located on the side of the latching assembly 200 near the power module and is connected to the temperature converter, conducting the temperature of the temperature converter to its own surface. The heat-conducting element contacts the power module, thus working in conjunction with the temperature converter to transfer heat from the temperature converter to the power module. This allows for uniform temperature control of the power module from multiple locations, enabling testing under the corresponding test conditions.

[0062] This embodiment of the invention includes a base 100 with multiple temperature converters arranged on the inner side of the base 100 facing the power module. These temperature converters transfer heat to the power module through the base 100. A slide rail 110 is located on both sides of the base 100 and extends along its length. A latching assembly 200 is connected to the slide rail 110 and slides along it to contact and fix the power module. A heat-conducting element is located on the side of the latching assembly 200 near the power module and connected to the temperature converters to transfer heat from the temperature converters to the power module. By providing multiple temperature converters on the inner side of the base 100 facing the power module and a heat-conducting element on the side of the latching assembly 200 near the power module, temperature control of the power module can be achieved at multiple locations, resulting in uniform heating of the power module and improved testing accuracy. By sliding the snap-fit ​​assembly 200 on the slide rail 110, different clamping lengths can be formed, thus accommodating a variety of power modules of different sizes, and not being limited to a single size power module. This makes the temperature control device versatile, allowing multiple power modules to be tested in one temperature control device.

[0063] In another embodiment of this utility model, the temperature control device for power module testing specifically includes the following components:

[0064] A base 100, on the inner side of the side of the base 100 facing the power module, is provided with a plurality of temperature converters, which are used to transfer heat to the power module through the base 100;

[0065] Slide rails 110 are located on both sides of the base 100, and the slide rails 110 extend along the length direction of the base 100;

[0066] The snap-fit ​​assembly 200 is connected to the slide rail 110 and is used to slide along the slide rail 110, contact the power module, and fix the power module.

[0067] A heat-conducting component is located on the side of the snap-fit ​​assembly 200 near the power module and is connected to the temperature converter to transfer heat from the temperature converter to the power module.

[0068] A temperature sensor is disposed on the side of the base 100 near the power module and on the side of the snap-fit ​​assembly 200 near the power module.

[0069] The light-emitting element is used to display a first color when the power module is fixed by the buckle assembly 200, and to display a second color when the power module is not fixed by the buckle assembly 200.

[0070] The temperature sensor is disposed on the side of the base 100 near the power module and on the side of the latching assembly 200 near the power module, thereby enabling temperature detection of the power module on these sides, improving the accuracy of temperature detection and thus enhancing temperature control precision. In one example, the temperature sensor includes a K-type thermocouple disposed on the side of the base 100 and the side of the latching assembly 200 near the power module. The temperature sensor can employ a K-type thermocouple for temperature detection. The K-type thermocouple, disposed on the side of the base 100 and the side of the latching assembly 200 near the power module, converts heat into an electrical signal for temperature-based control.

[0071] The light-emitting element can be disposed on the top or side of the base 100. When the power module is secured by the clip assembly 200, it displays a first color; when the power module is not secured by the clip assembly 200, it displays a second color. Different colors are used to indicate the connection status of the power module to the user. The light-emitting element can be a light-emitting diode (LED). For example, the first color can be green, and the second color can be red. When the power module is secured by the clip assembly 200, the light-emitting element emits green light; when the power module is not secured by the clip assembly 200, the light-emitting element emits red light.

[0072] In an optional embodiment of this utility model, the snap-fit ​​assembly 200 includes:

[0073] A slider (not shown in the figure) is connected to the slide rail 110 and is used to slide along the slide rail 110;

[0074] The elastic arm 210 is connected to the slider and is used to contact the side of the power module;

[0075] The claw buckle 220 is connected to the side of the elastic arm 210 near the power module and is used to contact the bottom of the power module.

[0076] In this embodiment of the invention, the latching assembly 200 may include a slider, an elastic arm 210, and a claw latch 220. The slider is connected to the slide rail 110 and can be embedded in the slide rail 110, sliding freely along the slide rail 110, thereby causing the elastic arm 210 and the claw latch 220 to slide. The elastic arm 210 is connected to the slider and is used for side contact with the power module, thereby clamping the power module from the side and fixing the power module in the length direction. The claw latch 220 is connected to the side of the elastic arm 210 near the power module, and by contacting the bottom of the power module, the claw latch 220 fixes the power module in the height direction.

[0077] In an optional embodiment of this utility model, the snap-fit ​​assembly 200 includes:

[0078] A locking element, connected to the elastic arm 210, is used to limit the range of motion of the elastic arm 210 in the locked state.

[0079] The locking element can be connected to the elastic arm 210. When the locking element is engaged with the elastic arm 210, it is in a locked state. In the locked state, the locking element restricts the range of motion of the elastic arm 210, preventing it from loosening during testing and causing abnormalities. This locking element ensures test stability and improves test efficiency. When the locking element is not engaged with the elastic arm 210, it is in a free-moving state, allowing the elastic arm 210 to move freely.

[0080] For example, the locking mechanism can be implemented using a magnetic latch or a pressure latch. The magnetic latch or pressure latch is activated by pressing the latch spring arm 210; after the power module is inserted, the spring arm 210 automatically locks the latch. Furthermore, to prevent accidental activation, the latch requires pressing or rotating at a specific angle to unlock, thus ensuring safety during use.

[0081] In an optional embodiment of this utility model, the snap-fit ​​assembly 200 includes:

[0082] Anti-slip element 230 is disposed on the side of the elastic arm 210 near the power module, and / or disposed on the side of the claw buckle 220 near the power module.

[0083] Anti-slip elements 230 can be provided in at least one of the sides of the elastic arm 210 and the claw 220 near the power module. The anti-slip elements 230 increase the friction between the contact surfaces of the elastic arm 210, the claw 220, and the power module, thereby providing a more stable clamping of the power module and ensuring clamping stability. In one example, the elastic arm 210 can be made of stainless steel spring sheet or highly elastic plastic, utilizing the elasticity of the elastic arm 210 to fix the power module.

[0084] In an optional embodiment of this utility model, the snap-fit ​​assembly 200 includes:

[0085] A flexible component is disposed on the side of the elastic arm 210 near the power module.

[0086] A flexible element is provided on the side of the elastic arm 210 near the power module. This flexible element contacts the power module, adapting to uneven surfaces while ensuring a tight fit to guarantee precise heat conduction and improve heating uniformity. The flexible element can be formed by layering silicone with a metal mesh, using the metal mesh as a framework and layering silicone on the outside of the mesh.

[0087] In an optional embodiment of this utility model, the slider and the elastic arm 210 are connected by a quick-release structure.

[0088] The slider and the elastic arm 210 are connected by a quick-release structure, which enables quick assembly and disassembly of the slider and the elastic arm 210. In different tests, different elastic arms 210 can be quickly replaced, thereby further expanding the clamping length range, improving versatility, and increasing testing efficiency.

[0089] Quick-release structures can take various forms, such as threaded quick-release structures that achieve rapid tightening and loosening through thread design (e.g., eccentric threads, self-locking threads); snap-on quick-release structures that achieve connection and separation through elastic deformation or mechanical interlocking; pin-type quick-release structures that achieve connection through the fit between a pin and a hole, and achieve rapid fixing and release with the help of a spring or locking mechanism; magnetic quick-release structures that achieve rapid connection and separation using the attraction force of a magnet; and lever-type quick-release structures that amplify the operating force through the lever principle, enabling rapid locking and loosening with one hand.

[0090] Furthermore, since the slider and the elastic arm 210 are connected by a quick-release structure, the elastic arm 210 can be modularly designed, so that different elastic arms 210 can be configured based on power modules of different sizes, thereby adapting to more power modules of different sizes.

[0091] In one embodiment of this utility model, the temperature converter can be a heating element, specifically a ceramic heating plate. Using a ceramic heating plate for heating allows for more precise conversion of electrical energy into heat energy, achieving a thermal efficiency of over 90% and significantly reducing energy consumption. Furthermore, the smooth surface of the ceramic plate and the uniform distribution of the heating elements improve the accuracy of temperature control.

[0092] In one embodiment of this utility model, the heat-conducting component can be a heat-conducting pad, which can be made of graphene or metal foil. By using graphene or metal foil for heat conduction, the efficiency of heat conduction is improved and the temperature uniformity is ensured.

[0093] In one embodiment of this utility model, at least one heat dissipation hole and an air duct can be provided in the base 100. The heat dissipation hole dissipates the heat generated by the temperature converter inside the base 100 to the outside of the base 100, preventing the temperature of the temperature converter from damaging the base 100. Alternatively, the air duct can be used to introduce fresh air into the base 100, thereby achieving cooling and protecting the base 100.

[0094] In one embodiment of this invention, a display screen can also be installed on the side of the base 100 away from the power module. The display screen shows the real-time status of the temperature control device being tested on the power module, thus facilitating user observation of the test results.

[0095] In one embodiment of this invention, a control button can also be installed on the side of the base 100 away from the power module, allowing the user to set the target temperature for testing. This allows for customization according to user needs.

[0096] In one embodiment of this invention, a power switch can also be installed on the side of the base 100 away from the power module. The user can control the power switch to start and stop the power module testing device.

[0097] In one embodiment of this utility model, an emergency stop button can also be installed on the side of the base 100 away from the power module. In case of abnormal operation of the device, the user can touch the emergency stop button to ensure safe use.

[0098] In an optional embodiment of this utility model, a fireproof plate can also be installed on the side of the temperature converter away from the power module to prevent damage to the base 100 when the temperature converter is abnormally hot.

[0099] In summary, the usage process of this utility model is described as follows:

[0100] For the heating test, start the temperature converter and observe whether the temperature gradually rises to the target value using the temperature sensor. Check whether the heating element is working properly and whether there is any short circuit or overheating.

[0101] Temperature sensor testing: Calibrate the sensor with a standard thermometer to ensure that the reading error is ≤ ±0.5℃.

[0102] Buckle function test: Place modules of different lengths and test whether the sliding buckle holes automatically adjust their positions. Check whether the clamping force of the elastic arm is uniform and whether the module is securely fixed.

[0103] For heating uniformity testing, place the IPM module inside the temperature control device and record the temperature changes at the top, middle, and bottom. Adjust the position or power of the temperature converter and heat-conducting components to ensure uniform temperature distribution (deviation ≤ ±2℃).

[0104] Temperature control accuracy test: Set a target temperature (e.g., 100℃) and observe whether the system remains stable within ±1℃. Conduct a long-term test (24 hours) and record temperature fluctuations.

[0105] The snap-fit ​​performance was tested separately for 10mm, 20mm, 30mm, 40mm and 50mm modules to verify the compatibility of the snap-fit ​​components.

[0106] The locking test checks whether the power module is locked by the locking mechanism after insertion, and whether the locking mechanism is reliable and prevents accidental activation.

[0107] Efficiency testing involves measuring the time required to heat from room temperature to the target temperature (e.g., ≤15 minutes from 25°C to 100°C). Record the temperature curve and analyze the heating / cooling rates. Complete the test.

[0108] This utility model embodiment also discloses a testing fixture, including a temperature control device for testing power modules as described above.

[0109] A temperature control device is used to simulate the environment in which the power module operates during testing. For example, a dual-pulse test is performed to assess the power module's performance.

[0110] In one example, a PID (proportional, integral, derivative) controller, relays, and a power module can be additionally installed in the test fixture. A temperature sensor and heating element are connected to the control system. A control program (such as Arduino code) is written to implement PID closed-loop control. This controls the temperature control device for testing the power module.

[0111] The temperature control device for testing the power module includes:

[0112] A base, on the inner side of the base facing the power module, is provided with multiple temperature converters, which are used to transfer heat to the power module through the base;

[0113] Slide rails are located on both sides of the base and extend along the length of the base;

[0114] A snap-fit ​​assembly is connected to the slide rail and is used to slide along the slide rail, contact the power module, and fix the power module.

[0115] A heat-conducting component is located on the side of the snap-fit ​​assembly near the power module and is connected to the temperature converter to transfer heat from the temperature converter to the power module.

[0116] Optionally, the snap-fit ​​assembly includes:

[0117] A slider, connected to the slide rail, is used to slide along the slide rail;

[0118] An elastic arm, connected to the slider, is used to contact the side of the power module;

[0119] The claw buckle is attached to the side of the elastic arm near the power module and is used to contact the bottom of the power module.

[0120] Optionally, the snap-fit ​​assembly includes:

[0121] A locking element, connected to the elastic arm, is used to limit the range of motion of the elastic arm in the locked state.

[0122] Optionally, the snap-fit ​​assembly includes:

[0123] Anti-slip components are provided on the side of the elastic arm near the power module, and / or on the side of the claw buckle near the power module.

[0124] Optionally, the snap-fit ​​assembly includes:

[0125] A flexible component is disposed on the side of the elastic arm near the power module.

[0126] Optionally, the slider and the elastic arm are connected by a quick-release structure.

[0127] Optionally, it also includes:

[0128] A temperature sensor is disposed on the side of the base near the power module and on the side of the latching assembly near the power module.

[0129] Optionally, the temperature sensor includes:

[0130] A type K thermocouple is disposed on the side of the base near the power module and on the side of the snap-fit ​​assembly near the power module.

[0131] Optionally, it also includes:

[0132] The light-emitting element is used to display a first color when the power module is fixed by the buckle assembly, and to display a second color when the power module is not fixed by the buckle assembly.

[0133] This embodiment of the invention includes a base with multiple temperature converters arranged on the inner side of the base facing the power module. These temperature converters transfer heat to the power module through the base. A slide rail is located on both sides of the base and extends along its length. A latching assembly is connected to the slide rail and slides along it to contact and fix the power module. A heat-conducting element is located on the side of the latching assembly near the power module and connected to the temperature converters to transfer heat from the temperature converters to the power module. By providing multiple temperature converters on the inner side of the base facing the power module and a heat-conducting element on the side of the latching assembly near the power module, the power module can be temperature-controlled at multiple locations, resulting in uniform heating and improved testing accuracy. The latching assembly slides along the slide rail, creating different clamping lengths to accommodate various power modules of different sizes, not limited to a single size. This makes the temperature control device versatile, allowing for the testing of multiple power modules within a single device.

[0134] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0135] The above provides a detailed description of a temperature control device and a testing fixture for power module testing provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A temperature control device for power module testing, characterized by, include: A base, on the inner side of the base facing the power module, is provided with multiple temperature converters, which are used to transfer heat to the power module through the base; Slide rails are located on both sides of the base and extend along the length of the base; A snap-fit ​​assembly is connected to the slide rail and is used to slide along the slide rail, contact the power module, and fix the power module. A heat-conducting component, located on the side of the snap-fit ​​assembly near the power module, is connected to the temperature converter and is used to transfer heat from the temperature converter to the power module.

2. The temperature-controlled apparatus for power module testing of claim 1, wherein, The snap-fit ​​assembly includes: A slider, connected to the slide rail, is used to slide along the slide rail; An elastic arm, connected to the slider, is used to contact the side of the power module; The claw buckle is attached to the side of the elastic arm near the power module and is used to contact the bottom of the power module.

3. The temperature-controlled apparatus for power module testing of claim 2, wherein, The snap-fit ​​assembly includes: A locking element, connected to the elastic arm, is used to limit the range of motion of the elastic arm in the locked state.

4. The temperature-controlled apparatus for power module testing of claim 2, wherein, The snap-fit ​​assembly includes: Anti-slip components are provided on the side of the elastic arm near the power module, and / or on the side of the claw buckle near the power module.

5. The temperature-controlled apparatus for power module testing of claim 2, wherein, The snap-fit ​​assembly includes: A flexible component is disposed on the side of the elastic arm near the power module.

6. The temperature-controlled apparatus for power module testing of claim 2, wherein, The slider and the elastic arm are connected by a quick-release structure.

7. Temperature control device for power module testing according to any of claims 1-5, characterized in that, Also includes: A temperature sensor is disposed on the side of the base near the power module and on the side of the latching assembly near the power module.

8. The temperature-controlled apparatus for power module testing of claim 7, wherein, The temperature sensor includes: A type K thermocouple is disposed on the side of the base near the power module and on the side of the snap-fit ​​assembly near the power module.

9. Temperature control apparatus for power module testing according to any one of claims 1-5, characterized in that, Also includes: The light-emitting element is used to display a first color when the power module is fixed by the buckle assembly, and to display a second color when the power module is not fixed by the buckle assembly.

10. A test fixture, characterized by, Including the temperature control device for power module testing as described in any one of claims 1-9.

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