Jig suitable for testing power module

Abstract

The utility model relates to a jig suitable for testing a power module, which comprises a test circuit board, a rotary crimping device and a temperature heating unit, a pin contact point is arranged on the surface of the test circuit board, the pin contact point is used for being contacted with a pin of the power module, the rotary crimping device comprises a crimping seat and a rotary moving assembly, and the rotary moving assembly is arranged on the test circuit board. The surface of the crimping seat is provided with an adaptive groove, the rotary moving assembly is used for driving the crimping seat to move towards the test circuit board, the temperature heating unit is used for heating the power module between the test circuit board and the crimping seat, electrical parameters of the module at different temperatures can be accurately tested, and different types of test boards can be replaced to test different packaged modules. The universality is high, the functionality is perfect, poor electrical contact in the test is reduced, and the production test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to test equipment technical field, concretely relates to a fixture suitable for power module test. BACKGROUND

[0002] At present, along with the increasing demand of new energy automobile production capacity, people pay more attention to the accuracy of vehicle level power module test and test parameters under different temperatures. The traditional manual test tool generally tests the module parameters under normal temperature, and a set of packaging clamp corresponds to the module of specific packaging form, which has low universality, high production test cost and imperfect test parameter function. In view of this, the present scheme is generated. INVENTION CONTENTS

[0003] In view of the deficiencies of the prior art, the utility model wants to solve the technical problem to provide a fixture suitable for power module test, which can accurately test the electrical parameters of the module under different temperatures, and can replace different types of test boards to test different packaged modules, has strong universality and perfect function, reduces the electrical contact failure of test, and improves the production test efficiency.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of a fixture suitable for power module test, which comprises a test circuit board, a rotating pressure contact device and a temperature heating unit, the test circuit board is provided with pin needle contact points on the surface, the pin needle contact points are used for contacting the pin needle of the power module, the rotating pressure contact device comprises a pressure contact seat and a rotating moving assembly, the pressure contact seat is provided with an adaptive groove on the surface, the rotating moving assembly is used for driving the pressure contact seat to move towards the test circuit board, and the temperature heating unit is used for heating the power module between the test circuit board and the pressure contact seat.

[0005] Further, the rotating moving assembly comprises a rotating fixed seat and a rotating column, the pressure contact seat is provided with a locking hole on the back surface, the rotating fixed seat is provided with a threaded hole, the threaded hole corresponds to the locking hole, the rotating column is formed with an external thread on the outer circumferential surface, and one end of the rotating column is locked in the locking hole and is rotatably connected.

[0006] Further, the pressure contact seat is formed with a convex seat on the back surface, and the opening of the locking hole is located on the surface of the convex seat.

[0007] Further, the other end of the rotating column is provided with a holding rod.

[0008] Further, the test circuit board is located in the outer shell, and the surface of the outer shell corresponds to the side of the pressure contact seat with the adaptive groove.

[0009] Further, the surface of the outer shell is formed with a positioning column, the surface of the pressure contact seat is formed with a positioning groove, and the positioning column and the positioning groove correspond to and adapt to each other.

[0010] Further, the outer shell surface is further formed with a plurality of stress release grooves.

[0011] Further, the outer shell is formed with a handle on one side wall.

[0012] Further, the temperature heating unit comprises a heating plate, a heating assembly and a temperature control assembly, the heating plate is located at the bottom of the adaptive groove, the heating assembly is used for heating the heating plate, and the temperature control assembly is used for controlling the temperature of the heating plate in the specified range.

[0013] Further, the control button is arranged on the side wall of the crimping seat, and the control button is used to start or stop the heating assembly and the temperature control assembly.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The test circuit board and the crimping device of the prior art are integrally connected, the practical applicability is poor for testing different packaging module products, the test cost is high, the test circuit board and the rotary crimping device in the utility model are separately arranged, different types of test boards can be used for testing, the practical versatility is strong, the test cost is reduced, and the production efficiency is improved.

[0016] 2. The crimping device of the prior art is crimped by pin needle positions on the front surface of the power module, the contact is not good, the pin needle positions are manually adjusted to be connected with the pin needle contact points on the crimping device, the test efficiency is low, and the contact failure rate is high; the rotary crimping device in the utility model is crimped and contacted by testing the heat dissipation substrate on the back surface of the power module, so that the pin needle on the front surface of the power module is contacted with the pin needle contact point on the test circuit board, and the contact is good.

[0017] 3. The crimping seat in the utility model is also crimped on the edge of the module, the crimping effect is better, the test sparking phenomenon is reduced, and the test efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic view of the utility model for a power module test fixture;

[0019] Figure 2 It is another three-dimensional structure schematic view of the utility model;

[0020] Figure 3 It is a three-dimensional structure schematic view of the test circuit board in the utility model;

[0021] Figure 4 It is a three-dimensional structure schematic view of the rotary crimping device in the utility model;

[0022] Figure 5 It is the overhead structure schematic view of the rotating pressure connection device in the utility model.

[0023] Figure 6 It is the section structure schematic view of the rotating pressure connection device in the utility model.

[0024] Marked in the drawing: 1, test circuit board;11, outer shell;111, positioning column;112, stress release groove;113, handle;114, electrical terminal;12, pin contact point;2, rotating pressure connection device;21, pressure connection seat;211, convex seat;212, clamping hole;213, adaptive groove;214, positioning groove;22, rotating fixed seat;221, threaded hole;23, rotating column;231, holding rod;232, clamping ring;3, heating plate. DETAILED DESCRIPTION

[0025] In order to let the above-mentioned features and advantages of the utility model more obvious and easy to understand, the following specific example is raised, and the detailed description is as follows in cooperation with the drawing.

[0026] As Figures 1-6 Indicated, the present embodiment provides a kind of jig suitable for power module test, including test circuit board 1, rotating pressure connection device 2 and temperature heating unit.

[0027] Rotating pressure connection device 2 includes pressure connection seat 21 and rotating movement component, pressure connection seat 21 surface has adaptive groove 213, rotating movement component is used to drive pressure connection seat 21 towards test circuit board 1 movement.Specifically, rotating movement component includes rotating fixed seat 22 and rotating column 23, pressure connection seat 21 back surface is provided with clamping hole 212, rotating fixed seat 22 has threaded hole 221, threaded hole 221 corresponds with clamping hole 212, rotating column 23 outer circumferential surface is formed with external thread, rotating column 23 is adapted with threaded hole 221 and one end clamping in clamping hole 212 rotationally connected, specifically, rotating column 23 end is provided with clamping ring 232, clamping hole 212 includes clamping portion and extension portion, clamping portion is adapted with clamping ring 232, extension portion is adapted with rotating column 23, rotating column 23 other end is provided with holding rod 231.Preferably, pressure connection seat 21 back surface is formed with convex seat 211, clamping hole 212 opening is located on the surface of convex seat 211, the reason of setting convex seat 211 is to let clamping hole 212 reduce the volume proportion in pressure connection seat 21, reduce the overall size of pressure connection seat 21.

[0028] The surface of the test circuit board 1 is provided with pin needle contact points 12, which are set according to the position of the pin needle on the power template, and the operator can change it according to the actual situation. The outer shell 11 is provided on the outer periphery of the test circuit board 1, specifically, the outer shell 11 has a mounting groove, and the test circuit board 1 is located in the mounting groove. The upper side of the outer shell 11 is also provided with an electrical terminal 114 leading out from the test circuit board 1, which is used to connect with the test machine. The outer shell 11 has a handle 113 formed on one side wall thereof. The surface of the outer shell 11 corresponds to one side of the fitting groove 213 of the crimping seat 21. Preferably, the surface of the outer shell 11 is formed with positioning columns 111, and the surface of the crimping seat 21 is formed with positioning grooves 214. The positioning columns 111 and the positioning grooves 214 correspond to and match each other. Specifically, the number of the positioning columns 111 and the positioning grooves 214 is three. One positioning column 111 is located on one side of the surface of the outer shell 11, and the other two positioning columns 111 are located on the other side of the surface of the outer shell 11 and are spaced apart. The positioning columns 111 and the positioning grooves 214 make the cooperation more tight and accurate. The surface of the outer shell 11 is also formed with a plurality of stress release grooves 112.

[0029] The temperature heating unit is used for heating the power module between the test circuit board 1 and the crimping seat 21. Specifically, the temperature heating unit comprises a heating plate 3, a heating assembly and a temperature control assembly. The heating plate 3 is located at the bottom of the fitting groove 213. The heating assembly is used for heating the heating plate 3. The temperature control assembly is used for controlling the temperature of the heating plate 3 within a specified range. The control button is arranged on the side wall of the crimping seat 21. The control button is used to start or stop the heating assembly and the temperature control assembly. The heating assembly and the temperature control assembly are selected from common heating structures and temperature control structures on the market, or other structures capable of achieving heating and temperature control of the heating plate 3. Here, no further description is given.

[0030] In the present scheme, the heating plate 3 can be selected from a graphite material heating plate 3 or a graphene material heating plate 3. In the present embodiment, a graphene material heating plate 3 is selected. In the prior art, metal materials are one of the common materials for heating plates 3, mainly including aluminum, steel and other metal materials. The advantages of metal materials are fast heating speed, uniform heating, not easy to damage and long service life. However, metal materials are easy to be corroded and difficult to control heat, which is easy to overheat. This makes the test result inaccurate and reduces the test efficiency. The ceramic heating plate 3 is made of high-temperature ceramic material, which has the advantages of not easy to be corroded, rapid heating and strong thermal stability. The disadvantage of ceramic material is that it is easy to be broken and damaged by mechanical impact and vibration, thereby bringing safety hidden dangers to test production.

[0031] Therefore, the graphite material heating plate 3 or the graphene material heating plate 3 is adopted in the scheme. The two kinds of heating plates 3 have very high thermal conductivity, can quickly and uniformly transfer heat, significantly improve the heating efficiency, and improve the production test efficiency. The graphene material heating plate 3 also has the characteristics of high energy saving, safety and reliability, and strong durability, which improves the reliability of the power module test fixture in testing the power module at different temperatures. The thermal conductivity of graphene is as high as 5300W / mK, which is one of the highest thermal conductivities known, much higher than common thermal conductive materials such as copper (401W / mK) and other metal materials. The heating plate 3 made of this material has high heating efficiency.

[0032] Working principle: in normal production test, the power module is placed on the test circuit board 1, the electrical terminals 114 on the test circuit board 1 are connected to the voltage and current input end of the test machine for electrical connection. We rotate the crimping device 2 to make the pin on the power module contact the pin contact point 12 on the test circuit board 1. Specifically, when crimping, the rotating fixed seat 22 is fixed so as not to move, then the holding rod 231 is rotated, the rotating column 23 moves towards the test circuit board 1 under the cooperation of the screw thread until the surface of the crimping seat 21 tightly fits the edge position of the heat dissipation bottom plate on the back of the power module, so that the pin on the power module contacts the pin contact point 12 on the test circuit board 1, thereby realizing crimping.

[0033] In high-temperature test, we add a graphene material heating plate 3 in the groove of the rotating crimping device 2. The heating assembly controls the heating plate 3 to heat up, and the temperature control assembly is used to control the temperature range. In the scheme, the graphene material heating plate 3 is selected, which has high heating efficiency and uniform temperature distribution, meets the test of the power module at different temperatures, helps the researchers to obtain test data more quickly for analysis, improves the test efficiency, reduces the production cost, and has strong versatility.

[0034] In crimping, the rotating fixed seat 22 is fixed so as not to move, then the holding rod 231 is rotated, the rotating column 23 moves towards the test circuit board 1 under the cooperation of the screw thread until the surface of the crimping seat 21 tightly fits the edge position of the heat dissipation bottom plate on the back of the power module, so that the pin on the power module contacts the pin contact point 12 on the test circuit board 1, thereby realizing crimping.

[0035] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and the skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application, and the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A fixture suitable for testing of power modules, characterized by: Including test circuit board, rotating compression device and temperature heating unit, the pin needle contact point is arranged on the surface of the test circuit board, the pin needle contact point is used for contacting the pin needle of the power module, the rotating compression device includes a compression seat and a rotating moving assembly, the surface of the compression seat has an adaptive groove, the rotating moving assembly is used for driving the compression seat to move towards the test circuit board, and the temperature heating unit is used for heating the power module between the test circuit board and the compression seat.

2. The fixture of claim 1, wherein: The rotating moving assembly includes a rotating fixed seat and a rotating column, the back surface of the compression seat is provided with a clamping hole, the rotating fixed seat has a threaded hole corresponding to the clamping hole, and the rotating column is formed with an external thread on the outer circumferential surface, and is rotatably connected with the threaded hole and clamped in the clamping hole at one end.

3. The fixture of claim 2, wherein: The back surface of the compression seat is formed with a convex seat, and the opening of the clamping hole is located on the surface of the convex seat.

4. The fixture of claim 2, wherein: The other end of the rotating column is provided with a holding rod.

5. The fixture of claim 1, wherein: The test circuit board is located in the outer shell, and the surface of the outer shell corresponds to the side of the compression seat with the adaptive groove.

6. The fixture of claim 5, wherein: The surface of the outer shell is formed with a positioning column, and the surface of the compression seat is formed with a positioning groove, the positioning column and the positioning groove correspond and adapt to each other.

7. The fixture of claim 5, wherein: The surface of the outer shell is also formed with a plurality of stress release grooves.

8. The fixture of claim 5, wherein: A handle is formed on one side wall of the outer shell.

9. The fixture of claim 1, wherein: The temperature heating unit includes a heating plate, a heating assembly and a temperature control assembly, the heating plate is located at the bottom of the adaptive groove, the heating assembly is used for heating the heating plate, and the temperature control assembly is used for controlling the temperature of the heating plate in a specified range.

10. The fixture of claim 9, wherein: The control button is arranged on the side wall of the compression seat, and is used for starting or closing the heating assembly and the temperature control assembly.

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