Special clamp for power cycle test

Abstract

The utility model relates to the field of chip testing, in particular to a special fixture for a power cycle test. Comprising N power cycle testing devices, the inlet end of each power cycle testing device is connected with a water inlet pipe, the outlet end of each power cycle testing device is connected with a water outlet pipe, and each power cycle testing device has the same structure and comprises a circulating pipeline connected between the water inlet pipe and the water outlet pipe; the testing assembly is detachably connected to the circulating pipeline; according to the utility model, the plurality of power cycle testing devices are arranged, so that the temperature of each product can be independently monitored, the flow of cooling water of each product is ensured to be consistent, and the consistency of product testing is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the chip test field, concretely relates to a special fixture of power cycle test. BACKGROUND

[0002] In prior art, the equipment provided by the manufacturer is only for IGBT test of flat bottom, through double-interface method, the water cooling plate is used to cool the IGBT product of flat bottom, and constant current is applied to realize power cycle test of minute level or second level.

[0003] And for uneven hybrid packaging drive module (HPD, Hybrid PACK TM Drive), the traditional test method is to use a set of connected fixture, connect multiple interconnected modules through the water inlet for test. Because multiple interconnected modules are connected, the first product first contacts the cooling water, and the cooling water contacted by other products is the water carried out after the heat dissipation of the previous product, the temperature rise of the water leads to poor cooling effect, leading to test failure more easily, which is inconsistent with the actual result. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a special fixture of power cycle test, solving the above technical problems.

[0005] The technical problem solved by the utility model can be realized by the following technical scheme:

[0006] A special fixture of power cycle test, comprising N power cycle test devices, the inlet end of the power cycle test device is connected with a water inlet pipe, the outlet end of the power cycle test device is connected with a water outlet pipe, the power cycle test device has the same structure, comprising,

[0007] The circulation pipeline is connected between the water inlet pipe and the water outlet pipe.

[0008] The test assembly is detachably connected to the circulation pipeline.

[0009] Wherein N is a positive integer greater than 1.

[0010] Preferably, the water inlet pipe and the water outlet pipe are arranged in parallel, and the N power cycle test devices are uniformly distributed along the length direction of the water inlet pipe and the water outlet pipe.

[0011] Preferably, the water inlet pipe is provided with N first interfaces on the side close to the circulation pipeline, and is provided with a water inlet on the side away from the circulation pipeline.

[0012] The water outlet pipe is provided with N second interfaces on the side close to the circulating pipeline, and is provided with a water outlet on the side away from the circulating pipeline.

[0013] Preferably, the water inlet pipe and the water outlet pipe are both flexible hose structures.

[0014] Preferably, the test assembly comprises a test table for placing the product to be tested and a temperature sensor arranged on the test table.

[0015] Preferably, the power cycle test device further comprises a flow meter arranged on the circulating pipeline.

[0016] Preferably, the power cycle test device further comprises,

[0017] a first switch arranged on the side of the circulating pipeline close to the water inlet pipe;

[0018] a second switch arranged on the side of the circulating pipeline close to the water outlet pipe.

[0019] Preferably, the first switch and the second switch are both ball valve switches.

[0020] Preferably, the power cycle test device further comprises,

[0021] a first mounting rack distributed along the length direction of the water inlet pipe, wherein the water inlet pipe is arranged on the first mounting rack;

[0022] a second mounting rack distributed along the arrangement direction of the power cycle test device, wherein the test assembly is arranged on the second mounting rack;

[0023] a third mounting rack distributed along the arrangement direction of the power cycle test device, wherein the flow meter is arranged on the third mounting rack;

[0024] a fourth mounting rack distributed along the length direction of the water outlet pipe, wherein the water outlet pipe is arranged on the fourth mounting rack.

[0025] Preferably, the power cycle test device further comprises a connecting rod penetrating the bottom of the first mounting rack, the second mounting rack, the third mounting rack and the fourth mounting rack.

[0026] The power cycle test device has the advantages that: by adopting the above technical scheme, the power cycle test device can independently monitor the temperature of each product and ensure the consistency of the cooling water flow of each product, thereby ensuring the consistency of product testing. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 FIG. 6 is a top view of the power cycle test special fixture in the embodiments of the present application;

[0028] Fig. 2 This is a side view of the power cycle testing fixture in this embodiment of the present invention.

[0029] Fig. 3 This is a schematic diagram of the structure of the special fixture for power cycle testing in the embodiments of this utility model.

[0030] In the attached diagram: 1. Power cycle test device; 11. Circulation pipe; 12. Test component; 13. Flow meter; 14. First switch; 15. Second switch; 2. Water inlet pipe; 21. Water inlet; 3. Water outlet; 31. Water outlet; 41. First mounting bracket; 42. Second mounting bracket; 43. Third mounting bracket; 44. Fourth mounting bracket; 5. Connecting rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0034] A special fixture for power cycle testing, such as Figs. 1 to 3 As shown, the system includes N power cycle testing devices 1. Each power cycle testing device 1 has an inlet pipe 2 connected to its inlet end and an outlet pipe 3 connected to its outlet end. The power cycle testing devices 1 have the same structure, including...

[0035] The circulation pipe 11 is connected between the inlet pipe 2 and the outlet pipe 3;

[0036] Test component 12 is detachably connected to circulation pipe 11;

[0037] Where N is a positive integer greater than 1.

[0038] Specifically, this utility model can independently monitor the temperature of each product and calculate the thermal resistance of each product by setting up multiple power cycle testing devices 1; and ensure that the flow rate of cooling water passing through each product is consistent by using flow meter 13, thus ensuring the consistency of product testing.

[0039] In a preferred embodiment, the water inlet pipe 2 is arranged in parallel with the water outlet pipe 3, and the N power cycle test devices 1 are evenly distributed along the length direction of the water inlet pipe 2 and the water outlet pipe 3.

[0040] In a preferred embodiment, the water inlet pipe 2 is arranged in parallel with the water outlet pipe 3, and the N power cycle test devices 1 are evenly distributed along the length direction of the water inlet pipe 2 and the water outlet pipe 3.

[0041] In a preferred embodiment, the water inlet pipe 2 is arranged in parallel with the water outlet pipe 3, and the N power cycle test devices 1 are evenly distributed along the length direction of the water inlet pipe 2 and the water outlet pipe 3.

[0042] Specifically, the number of power cycle test devices 1 can be set according to actual needs, and the water inlet pipe 2 and the water outlet pipe 3 can be adjusted according to product test requirements.

[0043] In a preferred embodiment, the water inlet pipe 2 and the water outlet pipe 3 are both flexible hose structures.

[0044] Specifically, the water inlet 21 is designed to be connected by a hose, and the hose connection makes the connection of the water inlet 21 more flexible, facilitating the arrangement and adjustment of the fixture position in different test environments without worrying about the rigidity of the water inlet pipe 2. The entire power cycle test fixture can be placed on a matching desktop to form a stable test structure.

[0045] In a preferred embodiment, the test assembly 12 includes a test table for placing the product to be tested and a temperature sensor arranged on the test table.

[0046] Specifically, the test table provides a stable placement platform for the product to be tested, ensuring that the product can maintain a fixed position and posture during the test process.

[0047] Specifically, the temperature sensor is used to monitor the product temperature, and the utility model adopts an embedded PT100 temperature sensing wire. The PT100 is close to the product to be tested but does not directly contact the cooling water. The distance between the PT100 temperature sensing wire and the cooling water is about 0.1mm, and the temperature difference between the measured temperature and the cooling water is about 1 degree, realizing independent measurement of the temperature of each product. The PT100 temperature sensing wire has high precision and stability, and can accurately obtain the real-time temperature change of the product during the power cycle test process.

[0048] By independently measuring the temperature of each product, the thermal resistance of each product can be calculated according to the temperature data.

[0049] In a preferred embodiment, the power cycle test device 1 further includes a flow meter 13 arranged on the circulation pipeline 11.

[0050] Specifically, the flow meter 13 can measure the flow of the cooling water in the circulation pipeline 11 in real time, output the actual flow of the cooling water in each power cycle test device 1. By comparing with the set target flow, the first switch 14 and the second switch 15 can be adjusted in time to ensure that the flow of the cooling water in each power cycle test device 1 is strictly consistent, so as to ensure that each product is tested under the same heat dissipation condition.

[0051] In a preferred embodiment, the power cycle test device 1 further comprises,

[0052] The first switch 14 is arranged on one side of the circulation pipeline 11 close to the water inlet pipe 2.

[0053] The second switch 15 is arranged on one side of the circulation pipeline 11 close to the water outlet pipe 3.

[0054] In a preferred embodiment, the first switch 14 and the second switch 15 are both ball valve switches.

[0055] Specifically, the first switch 14 and the second switch 15 can be used to independently control the on-off of the cooling water in each power cycle test device 1. The ball valve switch has the advantages of good sealing, convenient operation, fast opening and closing, accurate flow adjustment, etc. The operator can flexibly control the flow state of the cooling water in each power cycle test device 1 according to the test requirements.

[0056] In a preferred embodiment, the power cycle test device 1 further comprises,

[0057] The first mounting rack 41 is distributed along the length direction of the water inlet pipe 2, and the water inlet pipe 2 is arranged on the first mounting rack 41.

[0058] The second mounting rack 42 is distributed along the arrangement direction of the power cycle test device 1, and the test assembly 12 is arranged on the second mounting rack 42.

[0059] The third mounting rack 43 is distributed along the arrangement direction of the power cycle test device 1, and the flow meter 13 is arranged on the third mounting rack 43.

[0060] The fourth mounting rack 44 is distributed along the length direction of the water outlet pipe 3, and the water outlet pipe 3 is arranged on the fourth mounting rack 44.

[0061] Specifically, the first mounting rack 41 is distributed along the length direction of the water inlet pipe 2 and supports the water inlet pipe 2, the second mounting rack 42 is distributed along the arrangement direction of the power cycle test device 1 and carries the test assembly 12, ensuring the position stability of the product to be tested during the test process, the third mounting rack 43 supports the flow meter, ensuring the accuracy of the flow measurement, and the fourth mounting rack 44 supports and positions the water outlet pipe 3, ensuring the smoothness and stability of the water outlet process.

[0062] In a preferable embodiment, a connecting rod 5 is further included, which is arranged through the bottom of the first mounting frame 41, the second mounting frame 42, the third mounting frame 43 and the fourth mounting frame 44.

[0063] Specifically, the connecting rod 5 is used to connect the first mounting frame 41, the second mounting frame 42, the third mounting frame 43 and the fourth mounting frame 44, so as to make the structure stable, and the connecting rod 5 is located at the upper and lower ends of the power cycle test special fixture in the utility model.

[0064] Further specifically, the power cycle test special fixture is made of stainless steel as a whole. The test assembly 12 is a general type tooling, the test product can be re-customized and installed according to a product to be tested POD, the whole structure can be randomly disassembled, and maintenance is facilitated.

[0065] The above description is only the preferable embodiment of the utility model, and does not limit the implementation mode and the protection scope of the utility model, and for the person skilled in the art, it should be realized that the equivalent replacement and the obvious change obtained from the scheme of the application of the utility model specification and the drawing content should be included in the protection scope of the utility model.

Claims

1. A power cycle test dedicated fixture, characterized by, The power cycle test device (1) is connected with an inlet pipe (2) and an outlet pipe (3), and has the same structure, comprising, a circulation pipe (11) connected between the inlet pipe (2) and the outlet pipe (3); a test assembly (12) detachably connected to the circulation pipe (11); wherein N is a positive integer greater than 1; the test assembly (12) comprises a test table for placing a product to be tested and a temperature sensor arranged on the test table; the product to be tested is a hybrid package drive module with uneven bottom surface, the temperature sensor is close to the product to be tested but not in direct contact with the cooling water, and the distance between the temperature sensor and the cooling water is 0.1mm.

2. The power cycle test dedicated fixture of claim 1, wherein, The inlet pipe (2) and the outlet pipe (3) are arranged in parallel, and N power cycle test devices (1) are uniformly distributed along the length direction of the inlet pipe (2) and the outlet pipe (3).

3. The power cycle test dedicated fixture of claim 1, wherein, The side of the inlet pipe (2) close to the circulation pipe (11) is provided with N first interfaces, and the side of the inlet pipe (2) away from the circulation pipe (11) is provided with an inlet (21). The side of the outlet pipe (3) close to the circulation pipe (11) is provided with N second interfaces, and the side of the outlet pipe (3) away from the circulation pipe (11) is provided with an outlet (31).

4. The power cycle test dedicated fixture of claim 1, wherein, The inlet pipe (2) and the outlet pipe (3) are both flexible hose structures.

5. The power cycle test dedicated fixture of claim 1, wherein, The power cycle test device (1) further comprises a flow meter (13) arranged on the circulation pipe (11).

6. The power cycle test dedicated fixture of claim 1, wherein, The power cycle test device (1) further comprises, a first switch (14) arranged on the side of the circulation pipe (11) close to the inlet pipe (2); a second switch (15) arranged on the side of the circulation pipe (11) close to the outlet pipe (3).

7. The power cycle test dedicated fixture of claim 6, wherein, The first switch (14) and the second switch (15) are both ball valve switches.

8. The power cycle test dedicated fixture of claim 5, wherein, Further comprising, a first mounting rack (41) distributed along the length direction of the inlet pipe (2), wherein the inlet pipe (2) is arranged on the first mounting rack (41); a second mounting rack (42) distributed along the arrangement direction of the power cycle test device (1), wherein the test assembly (12) is arranged on the second mounting rack (42); a third mounting rack (43) distributed along the arrangement direction of the power cycle test device (1), wherein the flow meter (13) is arranged on the third mounting rack (43); a fourth mounting rack (44) distributed along the length direction of the outlet pipe (3), wherein the outlet pipe (3) is arranged on the fourth mounting rack (44).

9. The power cycle test dedicated fixture of claim 8, wherein, Further comprising a connecting rod (5) penetrating the bottom of the first mounting rack (41), the second mounting rack (42), the third mounting rack (43) and the fourth mounting rack (44).

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