CN106706963A - Large power compression type IGBT package module press mounting test clamp - Google Patents

Abstract

The invention provides a large power compression type IGBT package module press mounting test clamp which comprises a first fixed plate stack, a first conductive plate, a first water cooling heat radiation stack, a second conductive plate, a second water cooling heat radiation stack, a third conductive plate, and a second fixed plate stack which are in orderly compression connection from bottom to top in a horizontal direction and also comprises a water path main pipe and an insulation support rod arranged in a vertical direction. The water path main pipe is connected to the first water cooling heat radiation stack and the second water cooling heat radiation stack. The insulation support rod is arranged between the first fixed plate stack and the second first fixed plate stack. The second fixed plate stack comprises a pushing column and a second fixed plate with a through hole in the middle. The pushing column comprises a base and a support column formed in an integrated mode. The base and the third conductive plate are in a compression connection, and the support column extends into the through hole. A compensation replacement gasket is arranged between the base and the second fixed plate and is a metal gasket. The clamp has the advantages of easy operation, easy maintenance, a simple and compact overall structure, reasonable layout, good reliability and stability, and good heat radiation performance.

Description

A high-power crimping type IGBT package module press-fit test fixture

technical field

The invention relates to a fixture, in particular to a high-power crimping type IGBT packaging module press-fitting test fixture.

Background technique

Nowadays, IGBT, as a mainstream device in the world, has developed to the fifth generation of commercialization, and the IGBT packaging methods have also been diversified. For the diversification of packaging methods, there are also various pressing methods for the press-fit IGBT packaging module test fixture components. Various, among them, the relatively mature crimping type IGBT package module test fixture assembly structure is divided into two types: winding tape type and insulating rod type from the pressing method.

Although the material selected in both methods is glass fiber epoxy resin, the material used in the winding tape type is far more than that of the insulating rod type, and the size of the winding tape type cannot be adjusted, which will lead to a large error when the crimping IGBT is finally pressed. Large and other disadvantages, it is not suitable for press-fitting and fixing high-power IGBT package module test fixture components, factors such as winding tape type force direction are not fixed will lead to uneven press-fitting force under the working conditions of the crimping type IGBT package module, and the assembly of the overall fixture components Difficult force application operation, low assembly accuracy, small operating current, small capacity, and low reliability. When the press-fitting force is lower than the minimum specified value required for the normal operation of high-power crimping IGBT package modules, high-current conditions may occur The performance of the lower components is degraded or even destroyed; and when the press-fitting force exceeds the maximum specified value for the normal operation of the high-power press-fit IGBT package module, it will increase the mechanical stress on the silicon wafer. The service life of the device is greatly reduced and the cathode plating may be worn away leading to sluggish cathode-gate short circuit failure.

At present, the requirements for press-fit IGBT package module press-fit test fixture components are becoming more and more stringent, especially for large-size, high-power and high-voltage crimp-type IGBT package modules, which must be A certain pressing force is applied at both ends, and the pressing force must be kept within a certain range for a long time to ensure that the heat generated by the device due to power consumption can be transferred away.

Therefore, in view of the above background, it is necessary to provide a new test fixture with the advantages of compact structure, small size, stable performance, safety and reliability, easy assembly and disassembly, and easy application of pressing force, so as to meet the requirements of high-power crimping IGBT packaging modules. The press-fitting force required for safe and reliable conduction work.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention provides a crimp-type IGBT package that is easy to operate and maintain, has a simpler and more compact overall structure, a more reasonable layout, better reliability and stability, and better heat dissipation performance. The module press-fit test fixture makes the pressure distribution of the IGBT package module uniform and effectively guarantees the IGBT press-fit force requirements.

The technical solution provided by the present invention is: a high-power crimping type IGBT package module press-fit test fixture, including the first fixed plate set, the first conductive plate, and the first water-cooled heat dissipation group that are crimped sequentially from bottom to top in the horizontal direction cover, the second conductive plate, the second water-cooling heat dissipation set, the third conductive plate and the second fixed plate set, and the water main pipe and the insulating support rod arranged in the vertical direction; the water main pipe is connected with the first, The second water-cooling heat dissipation set is connected, and the insulating support rod is arranged between the first fixed plate set and the second fixed plate set;

The improvement is that: the second fixing plate set includes a pressing column and a second fixing plate with a through hole in the middle, and the pressing includes an integrally formed base and a pillar, and the base and the first The three conductive plates are crimped, and the pillar extends into the through hole; a compensation replacement gasket is provided between the base and the second fixing plate, and the compensation replacement gasket is a metal gasket.

Preferably, the first fixing plate set includes a positioning block assembly and a first fixing plate with a mounting hole left in the middle, the vertical profile of the positioning block assembly is T-shaped; the vertical profile of the mounting hole is It is in an inverted convex shape, and the inner diameter of its upper part is larger than that of its lower part; a cylindrical insulating cover with a cross-sectional diameter equal to the inner diameter of the upper part of the mounting hole is coaxially arranged in the mounting hole, and an opposing disc spring assembly is arranged inside the insulating cover , the opposed disc spring assembly is composed of disc springs of different specifications and standards placed coaxially in the vertical direction;

The top of the positioning block assembly is attached to the bottom of the first conductive plate, and the bottom of the positioning block extends into the through hole in the middle of the opposing disc spring assembly.

Preferably, each of the first and second water-cooling and heat-dissipating sets includes a water-cooling radiator with a crimped IGBT package module sandwiched therebetween in a vertical direction parallel to each other; cuboid, the upper and lower bosses of the IGBT package module are fitted with the bosses of the upper and lower water-cooled radiators respectively;

The two sides of the water-cooled radiator are respectively provided with a damping resistance component and a capacitor component; the other two sides are respectively provided with a drive board bracket, a water inlet and a water outlet;

The capacitor component is connected between two damping resistor components through a conductive copper sheet, and the damping resistor component is connected in parallel between the collector and the emitter of the IGBT package module.

Further, the waterway supervisor includes the water inlet supervisor and the water outlet supervisor; the waterway branch pipe includes the water inlet branch pipe and the water outlet branch pipe;

The side wall of the water inlet main pipe is provided with a connecting pipe for connecting the water inlet main pipe with the water inlet branch pipe; the side wall of the water outlet main pipe is provided with a connecting pipe for connecting the water outlet main pipe with the water outlet branch pipe. Connecting pipe; the other ends of the water inlet branch pipe and the water outlet branch pipe are respectively connected with the water inlet and the water outlet of the water-cooled radiator.

Further, the first fixing plate and the second fixing plate are rectangular metal plates, and arc-shaped gaps protruding toward the center of the rectangular metal plate are respectively left around the rectangular metal plate, and the rectangular metal plate is also provided with Vertically penetrating hoisting and fixing holes equally distributed around the circumference; the four corners of the first fixing plate are provided with longitudinally penetrating screw holes, and the four corners of the second fixing plate are correspondingly provided with longitudinally penetrating through holes.

Further, there are four insulating support rods, each of which has external threads at both ends, and one end of the four insulating support rods is threadedly connected and fixed to the four corners of the first fixing plate, and is flush with the bottom end of the first fixing plate; The other ends of the four insulating support rods respectively pass through the through holes at the four corners of the second fixing plate, and then are connected and fixed to the second fixing plate through top nuts.

Preferably, the compensation exchange gasket includes an integrally formed U-shaped body gasket and an auxiliary gasket protruding in the opposite direction of the opening of the U-shaped body gasket, and the upper part of the pressing column penetrates the U-shaped body gasket The U-shaped opening of the sheet extends into the through hole in the middle of the second fixing plate.

Further, the positioning block assembly includes a spherical top pressing block and a spherical compensation block. The spherical top pressing block includes an integrally formed cylindrical support column and a support platform at the top of the support column arranged coaxially, and the top of the support platform is upward. A raised spherical surface; the spherical compensation block is a rectangular block, and the bottom of the spherical compensation block is an upwardly concave spherical surface adapted to the top spherical surface of the support table; the bottom of the spherical compensation block is in contact with the support table The top is attached, and the top is attached to the lower surface of the first conductive plate; the support column extends into the through hole in the middle part of the opposing disc spring assembly.

Further, the drive board bracket is installed on the side of the water-cooled radiator through the bracket fixing slot; the drive board bracket and the bracket fixing slot are both made of plastic;

The drive plate bracket is a U-shaped bracket, including an integrally formed connecting plate and side plates vertically arranged at both ends of the connecting plate; the connecting plate and the side plates are double-layer plates with a clamping opening A splint structure, so that the drive plate can be inserted into the U-shaped bracket from the end of the side plate along the opposite direction of the opening of the U-shaped bracket;

The bracket fixing groove includes a rectangular bottom plate and fixing plates arranged on both sides of one side of the bottom plate, a fixing groove is formed between the fixing plates on both sides, the connecting plate is plugged into the fixing groove, and the other side of the bottom plate One side is attached to the side of the water-cooling radiator.

Further, the upper and lower ends of the water inlet main pipe and the water outlet main pipe are respectively connected to the second fixing plate and the first fixing plate through a fixing block assembly;

The fixed block assembly includes a U-shaped fixed block and a rectangular auxiliary block; the U-shaped fixed block is composed of an integrally formed connecting block and side blocks vertically arranged at both ends of the connecting block; the connecting block and the first and second Two fixed plates are connected, the side block is provided with two screw holes penetrating in the horizontal direction, and the inner side of the side block between the two screw holes is left with a semicircular cross-section suitable for the water inlet main pipe and the water outlet main pipe. groove;

The auxiliary block is provided with two mounting holes penetrating transversely, the distance between the two mounting holes is equal to the distance between the two screw holes on the side block, the auxiliary block between the two mounting holes There is a groove with a semicircular cross-section suitable for the water inlet main pipe and the water outlet main pipe;

The groove opening of the side block is opposite to the groove opening of the auxiliary block to form a circular through hole whose diameter is compatible with the pipe diameters of the water inlet main pipe and the water outlet main pipe. The water outlet main pipe runs through the through hole longitudinally, and is installed between the connecting block and the auxiliary block through bolts passing through the mounting hole and the screw hole transversely.

Compared with the closest technical solution, the present invention has the following remarkable progress:

(1) The tail of the water-cooled radiator is connected to the drive plate bracket through the bracket fixing groove, and the drive plate bracket is connected to the bracket fixing groove by direct plugging, which can make the whole structure compact and easy to disassemble;

(2) The use of the pressure column and the compensation replacement gasket can compensate for the gap caused by the large force range of the on-site operation, so that the pressure of the entire component can be better maintained;

(3) The compensation replacement gasket includes an integrally formed U-shaped main gasket and an auxiliary gasket that protrudes opposite to the opening of the U-shaped main gasket. During operation, the auxiliary gasket can be held and the compensation replacement gasket is inserted into the compensation In the gap between the top pressure column and the second fixed plate, the operation is more convenient;

(4) The drive plate bracket is a U-shaped bracket, including an integrally formed connecting plate and side plates vertically arranged at both ends of the connecting plate; Plate splint structure, so that the drive plate can be inserted into the U-shaped bracket from the end of the side plate along the U-shaped bracket opening in the opposite direction; this drawer-like installation makes the installation and removal of the drive plate more convenient, and the bracket The fixing slot and the drive plate bracket are made of high-performance plastic material, which has good insulation performance and is more convenient to work under high voltage;

(5) The bottom end of the insulating support rod is directly threaded with the first fixing plate, and the bottom end of the insulating supporting rod is flush with the bottom end of the first fixing plate. While realizing convenient installation and saving connecting devices, the whole assembly can be The lower end has a compact structure, and the bottom can maintain a certain required flatness when the components are assembled;

(6) The first fixed plate and the second fixed plate are rectangular metal plates, and there are circular arc-shaped gaps protruding toward the center of the rectangular metal plate around the four sides of the rectangular metal plate; Weight, so that the overall weight of the entire assembly is reduced;

(7) The spherical top pressure block and spherical compensation block are used in conjunction with the disc spring assembly to make the distribution of the longitudinal force more uniform after the assembly of the entire assembly.

Description of drawings

Fig. 1 is an axonometric view of a high-power crimping type IGBT package module press-fit test fixture provided by the present invention;

Fig. 2 is a front view of a high-power crimping type IGBT package module press-fit test fixture provided by the present invention;

Fig. 3 is a right view of a high-power crimping type IGBT package module press-fit test fixture provided by the present invention;

Fig. 4 is a top view of a high-power crimping type IGBT package module press-fit test fixture provided by the present invention;

Fig. 5 is an A-A cross-sectional view of a top view of a high-power crimping type IGBT package module press-fit test fixture provided by the present invention;

Fig. 6 is a drive plate bracket fixing groove of a high-power crimping type IGBT package module press-fit test fixture provided by the present invention;

Fig. 7 is a compensating replacement gasket of a high-power crimping type IGBT package module press-fit test fixture provided by the present invention.

Among them: 1—second fixed plate, 2—fixed block assembly, 3—top pressure column, 4—compensation replacement gasket, 5—insulation support rod, 6—nut, 7—third conductive plate, 8—water cooling radiator Set, 9—drive plate bracket, 10—bracket fixing slot. 11—IGBT package module, 12—second conductive plate, 13—first conductive plate, 14—spherical compensation block, 15—spherical top pressure block, 16—disc spring assembly, 17—insulation cover, 18—first fixed plate , 19—water inlet supervisor, 20—water outlet supervisor, 21—capacitor, 22—conductive copper sheet, 23—damping resistance.

detailed description

In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and examples.

As shown in Figures 1-3: the present invention provides a high-power crimping type IGBT packaging module press-fit test fixture, including: the first fixed plate set, the first conductive plate 13, The first water-cooled and heat-dissipating set, the second conductive plate 12, the second water-cooled and radiated set, the third conductive plate 7 and the second fixed plate set, the water main pipes (19 and 20) and the insulating support rod 5 arranged in the vertical direction , the water main pipe is connected to the first and second water-cooling heat dissipation sets through water branch pipes, and the insulating support rod 5 is arranged between the first fixed plate set and the second fixed plate set.

As shown in Figure 5, wherein: the second fixing plate set includes a vertical longitudinal section of an inverted T-shaped pressing column 3 and a second fixing plate 1 with a through hole in the middle, the pressing column 3 The bottom is crimped with the third conductive plate 7 , and its top protrudes into the through hole; a compensation replacement gasket 4 is provided between the lower end surface of the second fixing plate 1 and the pressing column 3 .

As shown in Figure 4: the second fixed plate 1 is made of metal materials with high strength, good heat dissipation performance and good electrical conductivity, and is a flower-shaped structure, and the length*width*height is set according to the specific design strength; A circular notch protruding toward the center of the second fixing plate 1 is left, which can reduce the weight on the basis of the original rectangular structure and reduce the overall weight of the entire assembly.

The four corners of the second fixing plate 1 are correspondingly provided with longitudinal through holes, so that the insulating support rod 5 in the vertical direction can pass through the through hole, and the second fixing plate 1 and the insulating supporting rod 5 are fixed; The rectangular metal plate is also provided with hoisting and fixing holes distributed longitudinally through the circumference, which are used for hoisting the fixture for testing.

As shown in FIG. 1 and FIG. 5 , there is an upwardly protruding cylindrical boss in the middle of the upper surface of the second fixing plate 1 , and the through hole in the middle of the second fixing plate 1 runs through the cylindrical boss.

The pressing column 3 is made of high-strength metal material with good electrical conductivity, one end of which extends into the through hole in the middle of the second fixing plate 1, and is connected with the external electric hydraulic pump piston rod in the through hole for transmission pressure; the other end of the top pressure column 3 is crimped with the third conductive plate 7, so that the pressure generated by the hydraulic pump can be transmitted to the water-cooled radiator and the crimped IGBT module. When the hydraulic pump presses down, it will form Gap, at this moment one by one the compensating exchange gasket 4 of different thickness is plugged in and is kept until the gap is full of pressure.

The compensation replacement pads 4 are high-strength metal pads with good electrical conductivity with different thickness specifications, which can be randomly selected according to the thickness during installation, and the operation is simple.

The main body of the compensation replacement gasket 4 is U-shaped, and the upper part of the pressing column 3 passes through the U-shaped opening and extends into the through hole in the middle of the second fixing plate 1; the compensation replacement gasket 4 compensates the pressing column under different pressures. The gap formed between 3 and the second fixed plate 1 keeps the pressure. In order to facilitate the insertion of the compensation replacement gasket 4, an auxiliary gasket protruding toward the opposite direction of the opening is left on the U-shaped body gasket. During operation like this, the auxiliary gasket can be held by hand, and the compensation replacement gasket 4 is inserted into the gap between the compensation pressing column 3 and the second fixed plate 1 .

As shown in Figure 1: the third conductive plate 7 is made of metal materials with high strength, good heat dissipation performance and good electrical conductivity; the cross-sectional area of the conductive plate is set according to the current carrying capacity. The function of the third conductive plate 7 is to connect with the positive pole of the capacitor 21 .

Each of the first and second water-cooling and heat-dissipating sets includes a water-cooling radiator in which the crimping type IGBT package module 11 is sandwiched in the vertical direction parallel to each other; the water-cooling radiator is a cuboid with bosses on the upper and lower surfaces, The upper and lower bosses of the IGBT package module 11 are respectively attached to the bosses of the upper and lower water cooling radiators.

Both sides of the water-cooled radiator are respectively provided with a damping resistance assembly and a capacitor assembly; the other two sides are respectively provided with a drive board bracket 9, and a water inlet and a water outlet.

The function of the water-cooled radiator is to help the crimping IGBT package module 11 and the damping resistor 23 to dissipate heat; when the water-cooled radiator is working, the water-cooled radiator is connected to the water inlet through an external circulating water machine to inject pure deionized water, and the inlet water temperature is 48°C; based on IGBT The radiator material should have the characteristics of strong thermal conductivity, high electrical conductivity, strong compression resistance, and strong corrosion resistance; the water-cooled radiator is made of aluminum alloy, the surface is electroplated with nickel, and the thickness of the nickel plating layer is 8-12 μm.

The second conductive plate 12 is located between the first water-cooled heat dissipation package and the second water-cooled heat dissipation package, and the second conductive plate 12 conductive plate is made of a metal material with high strength, good heat dissipation performance, and good electrical conductivity; according to the loading The flow rate sets the cross-sectional area of the conductive plate. The function of the second conductive plate 12 is to connect with the load.

The capacitor assembly includes a capacitor 21, and the damping resistor assembly includes a resistor 23; a capacitor 21 is set between the upper and lower damping resistors 23, and the capacitor 21 is made of a conductive copper sheet 22 made of a copper material with excellent electrical conductivity and a damping resistor 23. connected in series, and the damping resistor 23 is connected in parallel between the emitter and the collector of the IGBT package module 11 .

As shown in Figures 1 and 6, the drive board bracket 9 is connected to the water-cooled radiator through the bracket fixing groove 10; the driving board bracket 9 and the bracket fixing groove 10 are all made of high-performance plastics, which have good insulation performance and are more durable. It is convenient to work under high voltage.

The drive plate bracket 9 is a U-shaped bracket, including an integrally formed connecting plate and side plates vertically arranged at two ends of the connecting plate; the connecting plate and the side plates are double-layer splint structures, so that The connecting plate and the side of the side plate form a jaw; the jaw of the connecting plate communicates with the jaw of the side plate, so that the drive plate can be opened from the U-shaped bracket in the opposite direction. The end of the side plate is inserted into the U-shaped bracket; the insertion mode of the drive plate is similar to the form of a drawer, and the disassembly is relatively convenient.

The bracket fixing groove 10 includes a rectangular bottom plate and fixed plates parallel to each other located on one side of the bottom plate; one side of the bottom plate fits with the side of the water-cooled radiator, and is connected to the water-cooled radiator by bolts 6. The device is fixed, and the other side thereof is connected with the connecting plate through a fixing groove between the two fixing plates, and the connecting plate is directly inserted into the fixing groove.

As shown in Figure 1, the water inlet and the water outlet of the water-cooled radiator are connected to the water inlet main pipe 19 and the water outlet main pipe 20 through the water inlet branch pipe and the water outlet pipe respectively; The two ends are respectively connected to the second fixed plate 1 and the first fixed plate 18 through the fixed block assembly 2; the fixed block assembly 2 is made of high-performance insulating plastic, such as PVC and polyimide.

The fixed block assembly 2 includes a U-shaped fixed block and a rectangular auxiliary block; the U-shaped fixed block is composed of an integrally formed connecting block and side blocks vertically arranged at both ends of the connecting block; the connecting block is connected to the first, The second fixed plate 1 is connected, and the side block is provided with two screw holes penetrating in the horizontal direction, and the inner side of the side block between the two screw holes has a cross-section adapted to the water inlet main pipe 19 and the water outlet main pipe 20. semicircular grooves;

The auxiliary block is provided with two mounting holes penetrating transversely, the distance between the two mounting holes is equal to the distance between the two screw holes on the side block, the auxiliary block between the two mounting holes A groove with a semicircular cross-section adapted to the water inlet main pipe 19 and the water outlet main pipe 20 is provided;

The groove opening of the side block is opposite to the groove opening of the auxiliary block to form a circular through hole whose diameter is compatible with the pipe diameters of the water inlet main pipe 19 and the water outlet main pipe 20. The main pipe 19 and the water outlet main pipe 20 pass through the through hole longitudinally, and are installed between the connecting block and the auxiliary block through bolts passing through the mounting hole and the screw hole transversely.

The first conductive plate 13 is located between the first water-cooled heat dissipation set and the first fixed plate set. The first conductive plate 13 is made of metal material with high strength, good heat dissipation performance and good electrical conductivity; the conductive plate is set according to the current carrying capacity cross-sectional area. The function of the first conductive plate 13 is to connect with the negative pole of the capacitor 21 .

As shown in Figures 1 and 5: the first fixing plate set includes a positioning block assembly whose vertical longitudinal section is T-shaped and a first fixing plate 18 with an installation hole in the middle, the vertical longitudinal section of the installation hole The cross-section is an inverted convex shape, and the inner diameter of its upper part is greater than the inner diameter of its lower part; a cylindrical insulating cover 17 with a cross-sectional diameter equal to the inner diameter of the upper part of the mounting hole is coaxially arranged in the mounting hole, so that the spherical top pressure block 15 and The spherical compensation block 14 and the disc spring assembly 16 are longitudinally fixed and electrically insulated; the insulating cover 17 is provided with an opposing disc spring assembly 16, and the opposing disc spring assembly 16 is composed of disc springs of different specifications and standards along the vertical direction. Composed of coaxial alignment in the straight direction;

The top of the positioning block assembly is attached to the bottom of the first conductive plate 13 , and its bottom extends into the through hole in the middle of the opposing disc spring assembly 16 .

The positioning block assembly includes a spherical top pressing block 15 and a spherical compensating block 14, and the spherical top pressing block 15 includes a coaxially arranged cylindrical support column and a support platform at the top of the support column, and the top of the support platform is in the shape of upward convex spherical surface; the spherical surface compensation block 14 is a rectangular block, and the bottom of the spherical surface compensation block 14 is an upward concave spherical surface adapted to the top spherical surface of the support table; the bottom of the spherical surface compensation block 14 is in contact with the The top of the above-mentioned boss fits together, which can make the distribution of the longitudinal force more uniform after the entire assembly is assembled. The top of the spherical compensating block 14 is attached to the lower surface of the first conductive plate 13; the pillar extends into the through hole in the middle of the opposing disc spring assembly 16 to fix the disc spring assembly 16.

The first fixed plate 18 is identical with the second fixed plate 1 shape, also is flower-shaped interface, just the through hole at its four corners is a threaded hole, and the insulating support rod 5 bottoms are directly threaded with the second fixed plate 1, without bolts.

Disc spring assembly 16 adopts 50CrVA. The function of disc spring assembly 16 is to compensate for the non-coincident phenomenon between the longitudinal force direction and the axial direction of IGBT package module 11 caused by parts processing errors and material property errors; by selecting standard disc springs of different specifications The paired disc spring assembly 16 is formed to ensure that the crimping type IGBT package module 11 has sufficient pressure before it can work normally.

There are four insulating support rods 5, which are installed around the first fixed plate set and the second fixed plate set. The insulating support rods 5 are made of high-performance reinforced fiber materials and can withstand longitudinal tensile stress. The diameter of the rods is 20~ 30mm, and the two ends of the rod respectively tap the external threads with a length of 100mm; the bottom end of the insulating support rod 5 is threadedly connected with the first fixed plate 18, and the bottom is flush with the lower surface of the first fixed plate 18, which is more convenient during installation and saves The connection nut can also make the lower end of the entire assembly compact in structure, and the bottom of the assembly can maintain a certain required flatness; the top of the insulating support rod 5 passes through the through hole of the second fixing plate 1, and passes through a high-strength nut 6 and the second Two fixing plates 1 are detachably connected.

The above is only an embodiment of the present invention, and is not intended to limit the present invention. Any modification made within the spirit and principles of the present invention, equivalent replacements, improvements, etc. are included in the scope of the pending claims of the present invention.

Claims (10)

1. A high-power crimping type IGBT packaging module press-fitting test fixture, including the first fixed plate set, the first conductive plate, the first water-cooled heat dissipation set, and the second conductive plate that are crimped sequentially from bottom to top in the horizontal direction , the second water-cooling heat dissipation set, the third conductive plate and the second fixed plate set, and the water main pipe and the insulating support rod arranged in the vertical direction; the water main pipe is connected with the first and second water cooling heat dissipation sets through the water branch pipe connected, the insulating support rod is arranged between the first fixed plate set and the second fixed plate set; It is characterized in that: the second fixing plate set includes a pressing column and a second fixing plate with a through hole in the middle, the pressing includes an integrally formed base and a pillar, the base and the third conductive The plate is crimped, and the pillar extends into the through hole; a compensation replacement gasket is provided between the base and the second fixed plate, and the compensation replacement gasket is a metal gasket. 2. A high-power crimping type IGBT packaging module press-fit test fixture according to claim 1, characterized in that: The first fixing plate set includes a positioning block assembly and a first fixing plate with a mounting hole in the middle, the vertical profile of the positioning block assembly is T-shaped; the vertical profile of the mounting hole is an inverted convex The inner diameter of the upper part is larger than the inner diameter of the lower part; the installation hole is coaxially provided with a cylindrical insulating cover with a cross-sectional diameter equal to the inner diameter of the upper part of the installation hole, and the insulating cover is provided with an opposing disc spring assembly. The disc spring assembly is composed of disc springs of different specifications and standards placed coaxially in the vertical direction; The top of the positioning block assembly is attached to the bottom of the first conductive plate, and the bottom of the positioning block extends into the through hole in the middle of the opposing disc spring assembly. 3. A high-power crimping type IGBT package module press-fit test fixture according to claim 1, characterized in that: The first and second water-cooling and heat dissipation sets each include a water-cooling radiator with a crimped IGBT package module sandwiched therebetween in a vertical direction parallel to each other; the water-cooling radiator is a cuboid with bosses on the upper and lower surfaces, so The upper and lower bosses of the IGBT package module are respectively attached to the bosses of the upper and lower water-cooled radiators; The two sides of the water-cooled radiator are respectively provided with a damping resistance component and a capacitor component; the other two sides are respectively provided with a drive board bracket, a water inlet and a water outlet; The capacitor component is connected between two damping resistor components through a conductive copper sheet, and the damping resistor component is connected in parallel between the collector and the emitter of the IGBT package module. 4. A high-power crimping type IGBT packaging module press-fit test fixture according to claim 3, characterized in that: The waterway supervisor includes the water inlet supervisor and the water outlet supervisor; the waterway branch pipe includes the water inlet branch pipe and the water outlet branch pipe; The side wall of the water inlet main pipe is provided with a connecting pipe for connecting the water inlet main pipe with the water inlet branch pipe; the side wall of the water outlet main pipe is provided with a connecting pipe for connecting the water outlet main pipe with the water outlet branch pipe. Connecting pipe; the other ends of the water inlet branch pipe and the water outlet branch pipe are respectively connected with the water inlet and the water outlet of the water-cooled radiator. 5. A high-power crimping type IGBT package module press-fit test fixture according to claim 2, characterized in that: The first fixing plate and the second fixing plate are rectangular metal plates. There are arc-shaped gaps protruding toward the center of the rectangular metal plate around the rectangular metal plate. The rectangular metal plate is also provided with a longitudinal through The hoisting and fixing holes are equally distributed around the circumference; the four corners of the first fixing plate are provided with longitudinally penetrating screw holes, and the four corners of the second fixing plate are correspondingly provided with longitudinally penetrating through holes. 6. A high-power crimping type IGBT package module press-fit test fixture according to claim 5, characterized in that: There are four insulating support rods, with external threads at both ends, and one end of the four insulating support rods is threadedly connected and fixed with the four corners of the first fixing plate respectively, and is flush with the bottom end of the first fixing plate; The other ends of the insulating support rods respectively pass through the through holes at the four corners of the second fixing plate, and then are connected and fixed to the second fixing plate through top nuts. 7. A high-power crimping type IGBT package module press-fit test fixture according to claim 1, characterized in that: The compensation exchange gasket includes an integrally formed U-shaped main gasket and an auxiliary gasket protruding toward the opposite direction of the opening of the U-shaped main gasket, and the upper part of the pressing column passes through the U of the U-shaped main gasket. shaped opening and extend into the through hole in the middle of the second fixing plate. 8. A high-power crimping type IGBT package module press-fit test fixture according to claim 2, characterized in that: The positioning block assembly includes a spherical top pressing block and a spherical compensation block, and the spherical top pressing block includes a cylindrical support column integrally formed coaxially and a support platform at the top of the support column, and the top of the support platform is upwardly convex The spherical surface; the spherical compensation block is a rectangular block, and the bottom of the spherical compensation block is an upwardly concave spherical surface adapted to the top spherical surface of the support table; the bottom of the spherical compensation block is compatible with the top of the support table Fitting, the top of which fits with the lower surface of the first conductive plate; the support column extends into the through hole in the middle part of the opposing disc spring assembly. 9. A high-power crimping type IGBT package module press-fit test fixture according to claim 3, characterized in that: The drive board bracket is installed on the side of the water-cooled radiator through the bracket fixing slot; the drive board bracket and the bracket fixing slot are both made of plastic; The drive plate bracket is a U-shaped bracket, including an integrally formed connecting plate and side plates vertically arranged at both ends of the connecting plate; the connecting plate and the side plates are double-layer plates with a clamping opening A splint structure, so that the drive plate can be inserted into the U-shaped bracket from the end of the side plate along the opposite direction of the opening of the U-shaped bracket; The bracket fixing groove includes a rectangular bottom plate and fixing plates arranged on both sides of one side of the bottom plate, a fixing groove is formed between the fixing plates on both sides, the connecting plate is plugged into the fixing groove, and the other side of the bottom plate One side is attached to the side of the water-cooling radiator. 10. A high-power crimping type IGBT package module press-fit test fixture according to claim 4, characterized in that: The upper and lower ends of the water inlet main pipe and the water outlet main pipe are respectively connected to the second fixed plate and the first fixed plate through the fixed block assembly; The fixed block assembly includes a U-shaped fixed block and a rectangular auxiliary block; the U-shaped fixed block is composed of an integrally formed connecting block and side blocks vertically arranged at both ends of the connecting block; the connecting block and the first and second Two fixed plates are connected, the side block is provided with two screw holes penetrating in the horizontal direction, and the inner side of the side block between the two screw holes is left with a semicircular cross-section suitable for the water inlet main pipe and the water outlet main pipe. groove; The auxiliary block is provided with two mounting holes penetrating transversely, the distance between the two mounting holes is equal to the distance between the two screw holes on the side block, the auxiliary block between the two mounting holes There is a groove with a semicircular cross-section suitable for the water inlet main pipe and the water outlet main pipe; The groove opening of the side block is opposite to the groove opening of the auxiliary block to form a circular through hole whose diameter is compatible with the pipe diameters of the water inlet main pipe and the water outlet main pipe. The water outlet main pipe runs through the through hole longitudinally, and is installed between the connecting block and the auxiliary block through bolts passing through the mounting hole and the screw hole transversely.