Power cycle test tool structure, manufacturing method and power module test method

Abstract

The embodiment of the invention discloses a power cycle test tool structure, a manufacturing method and a power module test method. The structure comprises a radiator which comprises a device placing part, a first connecting part and a second connecting part; the device placing part is used for placing a three-phase full-bridge power module; the wiring conductive block is provided with a third mounting hole and a power terminal connecting hole, and the power terminal connecting hole is used for connecting a wiring terminal of the three-phase full-bridge power module; the first insulating plate is fixed on the first connecting part and is provided with a plurality of first mounting holes; the second insulating plate is fixed on the second connecting part and is provided with a plurality of second mounting holes; the two wiring conductive blocks are fixed on the first insulating plate through at least one first mounting hole; and / or the two wiring conductive blocks are fixed on the second insulating plate through at least one second mounting hole. According to the technical scheme, the manufacturing cost of the power cycle test packaging structure is reduced, and the compatibility is improved.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor technology, and in particular to a power cycle test tooling structure and a manufacturing method, and a power module testing method. Background Art

[0002] In the power cycle test fixture structure currently used for power modules, the electrical connection between the wiring copper block and the wiring terminals of the power module is achieved by bolts.

[0003] The power cycle test fixture structure is equipped with copper blocks for the terminals of each phase of the power module of the three-phase full-bridge power module. However, in the actual test process, not all three terminals of the power module of each phase need to be tested at the same time, resulting in too many copper blocks to be set, making the manufacturing cost of the power cycle test fixture structure too high, and the current fixture structure is not compatible with multiple power modules with similar packaging structures, resulting in a set of tests for a three-phase full-bridge power module with one packaging structure. Summary of the invention

[0004] The present invention provides a power cycle test tool structure and a manufacturing method, and a power module testing method, so as to reduce the manufacturing cost of the power cycle test tool structure and improve compatibility.

[0005] According to one aspect of the present invention, a power cycle test fixture structure is provided, comprising:

[0006] A heat sink, the heat sink comprising a device placement portion, a first connection portion and a second connection portion, the device placement portion being located between the first connection portion and the second connection portion; the device placement portion being used to place a three-phase full-bridge power module;

[0007] A wiring conductive block, wherein the wiring conductive block is provided with a third mounting hole and a power terminal connection hole, wherein the power terminal connection hole is used to connect a wiring terminal of the three-phase full-bridge power module;

[0008] A first insulating plate is fixed to the first connecting portion; the first insulating plate is provided with a plurality of first mounting holes;

[0009] A second insulating plate is fixed to the second connecting part; the second insulating plate is provided with a plurality of second mounting holes; the two wiring conductive blocks are fixed to the first insulating plate along a first direction by at least one of the first mounting holes cooperating with the third mounting hole; the first direction is perpendicular to the direction of the first connecting part pointing to the second connecting part; and / or, on the second insulating plate, the two wiring conductive blocks are fixed to the second insulating plate along a second direction by at least one of the first mounting holes cooperating with the third mounting hole; the second direction is the direction of the first connecting part pointing to the second connecting part.

[0010] According to another aspect of the present invention, there is provided a method for manufacturing a power cycle test fixture structure, comprising:

[0011] A heat sink is provided, the heat sink comprising a device placement portion, a first connection portion, and a second connection portion, the device placement portion is located between the first connection portion and the second connection portion; the device placement portion is used to place a three-phase full-bridge power module;

[0012] Providing a wiring conductive block, wherein the wiring conductive block is provided with a third mounting hole and a power terminal connection hole, wherein the power terminal connection hole is used to connect a wiring terminal of the three-phase full-bridge power module;

[0013] forming a first insulating plate, wherein the first insulating plate is fixed to the first connecting portion; and the first insulating plate is provided with a plurality of first mounting holes;

[0014] forming a second insulating plate, wherein the second insulating plate is fixed to the second connecting portion; the second insulating plate is provided with a plurality of second mounting holes;

[0015] The two wiring conductive blocks are fixed to the first insulating plate along a first direction by at least one of the first mounting holes cooperating with the third mounting hole; the first direction is perpendicular to the direction of the first connecting part pointing to the second connecting part; and / or, on the second insulating plate, the two wiring conductive blocks are fixed to the second insulating plate along a second direction by at least one of the first mounting holes cooperating with the third mounting hole; the second direction is the direction of the first connecting part pointing to the second connecting part.

[0016] According to another aspect of the present invention, there is provided a power module testing method, comprising:

[0017] According to the test capability and test requirements of the power cycle test equipment, the number N of three-phase full-bridge power modules and the number N of power cycle test fixture structures to be tested are selected, wherein the value of N includes an integer greater than or equal to 1; the power cycle test fixture structure is the power cycle test fixture structure described in any embodiment of the present invention;

[0018] Install the three-phase full-bridge power modules on the device placement parts of the power cycle test fixture structure one by one;

[0019] According to the test requirements, the wiring conductive blocks are fixed on the first insulating plate and / or the second insulating plate; the two wiring conductive blocks are fixed to the first insulating plate along a first direction through at least one of the first mounting holes cooperating with the third mounting holes; the first direction is perpendicular to the direction of the first connecting part pointing to the second connecting part; and / or, on the second insulating plate, the two wiring conductive blocks are fixed to the second insulating plate along a second direction through at least one of the first mounting holes cooperating with the third mounting holes; the second direction is the direction of the first connecting part pointing to the second connecting part;

[0020] introducing coolant into the coolant channel of the radiator;

[0021] The N three-phase full-bridge power modules are tested.

[0022] The embodiment of the present invention provides a power cycle test fixture structure including a heat sink, and the device placement part of the heat sink can be placed corresponding to a three-phase full-bridge power module. In actual testing, the number of power cycle test fixture structures can be selected according to the test capability and test requirements of the power cycle test equipment, and a three-phase full-bridge power module can be placed in the device placement part of at least one power cycle test fixture structure for power cycle testing. Two wiring conductive blocks are fixed to the first insulating plate along the first direction through at least one first mounting hole and a third mounting hole; the first direction is perpendicular to the direction of the first connection part pointing to the second connection part, that is, in the first direction, the first mounting holes required by the two wiring conductive blocks are shared; and / or, the two wiring conductive blocks are fixed to the second insulating plate along the second direction through at least one second mounting hole and a third mounting hole, that is, in the second direction, the second mounting holes required by the two wiring conductive blocks are shared. The above technical solution reduces the number of first mounting holes on the first insulating plate and the number of second mounting holes on the second insulating plate, thereby reducing the manufacturing cost of the power cycle test fixture structure. Among them, in the second direction, the second mounting holes required by the two wiring conductive blocks are shared, and the corresponding second mounting holes can be selected according to the length of the wiring terminal extending above the second insulating plate, so that the tooling structure can be compatible with a variety of three-phase full-bridge power modules with similar packaging structures, avoiding the need for a set of test tooling structures for a three-phase full-bridge power module with one packaging structure, reducing manufacturing costs and improving the convenience of maintenance and use.

[0023] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of a power cycle test tooling structure provided by an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of a three-phase full-bridge power module provided by an embodiment of the present invention;

[0027] Figure 3 is a top view of a first insulating plate, a second insulating plate and a three-phase full-bridge power module provided by an embodiment of the present invention;

[0028] Figure 4 is a top view of another first insulating plate, a second insulating plate and a three-phase full-bridge power module provided by an embodiment of the present invention;

[0029] Figure 5 It is a structural schematic diagram of two power cycle test fixture structures connected in series provided by an embodiment of the present invention;

[0030] Figure 6 It is a structural schematic diagram of two power cycle test fixture structures connected in parallel provided by an embodiment of the present invention;

[0031] Figure 7 is a three-dimensional diagram of a first wiring conductive block provided by an embodiment of the present invention;

[0032] Figure 8 yes Figure 7 A top view of the first wiring conductive block in;

[0033] Fig. 9 is a three-dimensional diagram of a second wiring conductive block provided by an embodiment of the present invention;

[0034] Fig.10 yes Fig. 9 A top view of the second wiring conductive block in;

[0035] Fig.11 is a three-dimensional diagram of a third wiring conductive block provided by an embodiment of the present invention;

[0036] Fig.12 yes Fig.11 A top view of the third wiring conductive block;

[0037] Fig.13It is a structural schematic diagram of a connection method between a wiring terminal and a wiring conductive block provided by an embodiment of the present invention;

[0038] Fig.14 It is a structural schematic diagram of another connection method between a wiring terminal and a wiring conductive block provided by an embodiment of the present invention;

[0039] Fig.15 It is a structural schematic diagram of another connection method between a wiring terminal and a wiring conductive block provided by an embodiment of the present invention;

[0040] Fig.16 It is a structural schematic diagram of another connection method between a wiring terminal and a wiring conductive block provided by an embodiment of the present invention;

[0041] Fig.17 It is a structural schematic diagram of another connection method between a wiring terminal and a wiring conductive block provided by an embodiment of the present invention;

[0042] Fig.18 It is a structural schematic diagram of another connection method between a wiring terminal and a wiring conductive block provided by an embodiment of the present invention;

[0043] Fig.19 It is a structural schematic diagram of another connection method between a wiring terminal and a wiring conductive block provided by an embodiment of the present invention;

[0044] Fig. 20 It is a structural schematic diagram of another connection method between a wiring terminal and a wiring conductive block provided by an embodiment of the present invention;

[0045] Fig.21 It is a schematic flow chart of a method for manufacturing a power cycle test tooling structure provided by an embodiment of the present invention;

[0046] Fig. 22 It is a flow chart of a power module testing method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] In order to reduce the manufacturing cost of the power cycle test fixture structure, the embodiment of the present invention provides the following technical solutions:

[0050] Figure 1 is a schematic diagram of a power cycle test fixture structure provided by an embodiment of the present invention, Figure 2 is a schematic diagram of the structure of a three-phase full-bridge power module provided by an embodiment of the present invention, Figure 3 is a top view of a first insulating plate, a second insulating plate and a three-phase full-bridge power module provided by an embodiment of the present invention, Figure 4 is a top view of another first insulating plate, a second insulating plate and a three-phase full-bridge power module provided by an embodiment of the present invention, Figure 5 is a schematic structural diagram of two power cycle test fixture structures connected in series provided by an embodiment of the present invention, Figure 6 It is a structural schematic diagram of two power cycle test fixture structures connected in parallel provided by an embodiment of the present invention.

[0051] refer to Figure 1 Combined with Figure 2 and Figure 3 as well as Figure 4 and Figure 5The power cycle test fixture structure includes: a heat sink 100, the heat sink 100 includes a device placement portion 101, a first connection portion 102 and a second connection portion 103, the device placement portion 101 is located between the first connection portion 102 and the second connection portion 103; the device placement portion 101 is used to place the three-phase full-bridge power module 200; a wiring conductive block 500, the wiring conductive block 500 is provided with a third mounting hole 501 and a power terminal connection hole 502, the power terminal connection hole 502 is used to connect the wiring terminal of the three-phase full-bridge power module 200; a first insulating plate 300, fixed to the first connection portion 102; the first insulating plate 300 is provided with a plurality of A first mounting hole 301; a second insulating plate 400 is fixed to the second connecting portion 103; the second insulating plate 400 is provided with a plurality of second mounting holes 401; two wiring conductive blocks 500 are fixed to the first insulating plate 300 along a first direction by at least one first mounting hole 301 cooperating with a third mounting hole 501; the first direction is perpendicular to the direction of the first connecting portion 102 pointing to the second connecting portion 103; and / or, the two wiring conductive blocks 500 are fixed to the second insulating plate 400 along a second direction by at least one second mounting hole 401 cooperating with a third mounting hole 501; the second direction is the direction of the first connecting portion 102 pointing to the second connecting portion 103.

[0052] The first direction is Figure 1 The X direction in the second direction is Figure 1 in the Y direction.

[0053] The embodiment of the present invention provides a power cycle test fixture structure including a heat sink 100, and a device placement portion 101 of the heat sink 100 can be placed corresponding to a three-phase full-bridge power module 200. In actual testing, the number of power cycle test fixture structures can be selected according to the test capability and test requirements of the power cycle test equipment, and a three-phase full-bridge power module 200 is placed in the device placement portion 101 of at least one power cycle test fixture structure for power cycle testing. Two wiring conductive blocks 500 are fixed to the first insulating plate 300 along a first direction through at least one first mounting hole 301 and a third mounting hole 501; the first direction is perpendicular to the direction of the first connecting portion 102 pointing to the second connecting portion 103, that is, in the first direction, the first mounting hole 301 required by the two wiring conductive blocks 500 is shared; and / or, the two wiring conductive blocks 500 are fixed to the second insulating plate 400 along a second direction through at least one second mounting hole 401 and a third mounting hole 501, that is, in the second direction, the second mounting hole 401 required by the two wiring conductive blocks 500 is shared. The above technical solution reduces the number of the first mounting holes 301 on the first insulating plate 300 and the second mounting holes 401 on the second insulating plate 400, thereby reducing the manufacturing cost of the power cycle test fixture structure. In the second direction, the second mounting holes 401 required by the two wiring conductive blocks 500 are shared, and the corresponding second mounting holes 401 can be selected according to the length of the wiring terminal extending above the second insulating plate 400, so that the fixture structure can be compatible with a variety of three-phase full-bridge power modules 200 with similar packaging structures, avoiding the need for a set of test fixture structures for a three-phase full-bridge power module 200 with a packaging structure, reducing manufacturing costs and improving the convenience of maintenance and use.

[0054] Optionally, on the basis of the above technical solution, the power cycle test fixture structure is used to perform a power cycle test on a three-phase full-bridge power module 200, wherein the three-phase full-bridge power module 200 includes a U phase 200a, a V phase 200b and a W phase 200c, and the connection terminals of the U phase 200a, the V phase 200b and the W phase 200c of the three-phase full-bridge power module 200 all include a first terminal 201, a second terminal 202 and a third terminal 203; the first terminal 201 and the second terminal 202 face the first connecting portion 102, and the third terminal 203 faces the first connecting portion 103. 03 toward the second connecting portion 103; in the first direction, the first mounting holes 301 corresponding to the first terminals 201 and the second terminals 202 of any one of the U phase 200a, V phase 200b and W phase 200c of the three-phase full-bridge power module 200 and the adjacent phases of the three-phase full-bridge power module 200 are all shared; in the second direction, the plurality of second mounting holes 401 include at least two groups of mounting hole combinations arranged at intervals; the U phase 200a, V phase 200b and W phase 200c included in the three-phase full-bridge power module 200 The third terminal 203 of any phase of the three-phase full-bridge power module 200 is arranged correspondingly to at least two groups of mounting hole combinations; in the second direction, the second mounting holes 401 of any two groups of mounting hole combinations arranged adjacently are shared; the first terminal 201 and the third terminal 203 or the second terminal 202 and the third terminal 203 of any phase of the U phase 200a, the V phase 200b and the W phase 200c included in the three-phase full-bridge power module 200 are electrically connected through the first connection structure and the power terminal connection hole 502 of the wiring conductive block 500; and the first terminal 201 or the third terminal 203 of any phase of the three-phase full-bridge power module 200a, the V phase 200b and the W phase 200c are electrically connected through the first connection structure and the power terminal connection hole 502 of the wiring conductive block 500; The wiring conductive block 500 electrically connected to the second terminal 202 is fixed to at least two first mounting holes 301 of the first insulating plate 300 through a second connecting structure and at least two third mounting holes 501, and the third mounting holes 501 and the first mounting holes 301 are arranged in a one-to-one correspondence; the wiring conductive block 500 electrically connected to the third terminal 203 is fixed to at least two second mounting holes 401 of the second insulating plate 400 through a second connecting structure and at least two third mounting holes 501, and the third mounting holes 501 and the second mounting holes 401 are arranged in a one-to-one correspondence.

[0055] in, Figure 5 In the actual test, according to the test capability and test requirements of the power cycle test equipment, the three-phase full-bridge power modules 200 are placed in the device placement parts 101 of the two power cycle test fixture structures for power cycle testing, and the two power cycle test fixture structures are connected in series. Figure 6 In the actual test, according to the test capability and test requirements of the power cycle test equipment, the three-phase full-bridge power modules 200 are placed in the device placement parts 101 of the two power cycle test fixture structures for power cycle testing, and the two power cycle test fixture structures are connected in parallel.

[0056] Figure 3In the embodiment, the wiring conductive block 500 electrically connected to the first terminal 201 or the second terminal 202 is fixed to the three first mounting holes 301 of the first insulating plate 300 through the second connection structure and the three third mounting holes 501, and the third mounting holes 501 and the first mounting holes 301 are arranged in a one-to-one correspondence. The wiring conductive block 500 electrically connected to the third terminal 203 is fixed to the three second mounting holes 401 of the second insulating plate 400 through the second connection structure and the three third mounting holes 501, and the third mounting holes 501 and the second mounting holes 401 are arranged in a one-to-one correspondence.

[0057] Figure 4 In the embodiment, the wiring conductive block 500 electrically connected to the first terminal 201 or the second terminal 202 is fixed to the two first mounting holes 301 of the first insulating plate 300 through the second connection structure and the two third mounting holes 501, and the third mounting holes 501 and the first mounting holes 301 are arranged in a one-to-one correspondence. The wiring conductive block 500 electrically connected to the third terminal 203 is fixed to the two second mounting holes 401 of the second insulating plate 400 through the second connection structure and the two third mounting holes 501, and the third mounting holes 501 and the second mounting holes 401 are arranged in a one-to-one correspondence. Optionally, the third mounting hole 501 is a countersunk hole.

[0058] Optionally, the first insulating plate 300 is provided with a fourth mounting hole 302, and the first insulating plate 300 is fixed to the sixth mounting hole of the first connecting portion 102 through the fourth mounting hole 302 and the fourth connecting structure. The second insulating plate 400 is provided with a seventh mounting hole 402, and the second insulating plate 400 is fixed to the eighth mounting hole of the second connecting portion 103 through the seventh mounting hole 402 and the fourth connecting structure. Optionally, the fourth mounting hole 302 is a countersunk hole, and / or the seventh mounting hole 402 is a countersunk hole.

[0059] The fourth connection structure is a bolt, and the fourth mounting hole 302 and the seventh mounting hole 402 where the bolt is located are provided with a threaded cap to prevent failure of the threaded connection.

[0060] Optionally, the first insulating plate 300 and the second insulating plate 400 are nylon plates, the heat sink 100 is made of aluminum alloy, and the wiring conductive block 500 is a wiring conductive copper block.

[0061] A sealing ring 03 is provided between the device placement portion 101 and the three-phase full-bridge power module 200 .

[0062] A cooling liquid channel 104 is provided in the device placement portion 101 , and cooling liquid flows through the cooling liquid channel 104 for heat dissipation during the power module test process.

[0063] After careful research, the inventors found that the prior art requires that in the power cycle test tooling structure, there is no common mounting hole required for the wiring copper block electrically connected to each terminal. Therefore, during the test process, the required wiring copper blocks are installed in advance on the first insulating plate 300 and the second insulating plate 400, resulting in too many wiring copper blocks that need to be installed, making the manufacturing cost of the power cycle test tooling structure too high.

[0064] The embodiment of the present invention provides a power cycle test fixture structure including a heat sink 100, and a device placement portion 101 of the heat sink 100 can be placed corresponding to a three-phase full-bridge power module 200. In actual testing, the number of power cycle test fixture structures can be selected according to the test capability and test requirements of the power cycle test equipment, and a three-phase full-bridge power module 200 is placed in the device placement portion 101 of at least one power cycle test fixture structure for power cycle testing. The first terminal 201 and the third terminal 203 or the second terminal 202 and the third terminal 203 of any one phase of the U phase 200a, the V phase 200b and the W phase 200c included in the three-phase full-bridge power module 200 are electrically connected through the first connection structure and the power terminal connection hole 502 of the wiring conductive block 500, that is, the first terminal 201 and the second terminal 202 of the same phase of the three-phase full-bridge power module 200 will not be electrically connected to the wiring conductive block 500 at the same time. The first mounting holes 301 corresponding to the first terminals 201 and the second terminals 202 of any one of the U phase 200a, V phase 200b and W phase 200c included in the three-phase full-bridge power module 200 and the adjacent phases of the three-phase full-bridge power module 200 are shared, and in the second direction, the second mounting holes 401 of any two groups of mounting holes arranged adjacently on the second insulating plate 400 are shared, which reduces the number of the first mounting holes 301 on the first insulating plate 300 and the second mounting holes 401 on the second insulating plate 400, and at the same time reduces the number of wiring conductive blocks 500 fixed on the first insulating plate 300 and the second insulating plate 400 at the same time, thereby reducing the manufacturing cost of the power cycle test fixture structure. Figure 1 The plurality of second mounting holes 401 include at least two groups of mounting hole combinations spaced apart, and the corresponding mounting hole group can be selected according to the length of the third terminal 203 extending above the second insulating plate 400, so that the tooling structure can be compatible with a plurality of three-phase full-bridge power modules 200 with similar packaging structures, thereby avoiding the need for a set of test tooling structures for a three-phase full-bridge power module 200 with a packaging structure, reducing manufacturing costs, and improving the convenience of maintenance and use.

[0065] Optionally, based on the above technical solution, during actual testing, one or more power cycle test fixture structures are selected according to the test capability and test requirements of the power cycle test equipment, and a corresponding number of three-phase full-bridge power modules 200 are placed in the device placement part 101 of the power cycle test fixture structure to perform a power cycle test, and different power cycle test fixture structures are connected in series or in parallel.

[0066] For example, Figure 5 In the actual test, the three-phase full-bridge power modules 200 are respectively placed in the device placement parts 101 of the two power cycle test fixture structures to perform the power cycle test, and the two power cycle test fixture structures are connected in series. Figure 6 In the test, two power cycle test fixture structures are connected in parallel.

[0067] Optionally, based on the above technical solution, the first insulating plate 300 and / or the second insulating plate 400 is further used to support the first connection structure and the second connection structure located in the power terminal connection hole 502 .

[0068] Specifically, when the wiring conductive block 500 is fixed to the first insulating plate 300 and the wiring conductive block 500 is connected to the first terminal 201 or the second terminal 202, the first insulating plate 300 is used to support the first connection structure located in the power terminal connection hole 502 and the second connection structure located in the third mounting hole 501. When the wiring conductive block 500 is fixed to the second insulating plate 400 and the wiring conductive block 500 is connected to the third terminal 203, the second insulating plate 400 is also used to support the first connection structure located in the power terminal connection hole 502 and the second connection structure located in the third mounting hole 501.

[0069] Compared with the structure in which the power terminal connection hole 502 and the first connection structure and the third mounting hole 501 and the second connection structure are suspended on the first insulating plate 300 and / or the second insulating plate 400, the above technical solution avoids the torque on the terminal during tightening or disassembly, thereby avoiding the failure problem of the terminal.

[0070] Figure 7 is a three-dimensional diagram of a first wiring conductive block provided by an embodiment of the present invention; Figure 8 yes Figure 7 A top view of the first wiring conductive block in; Fig. 9 is a three-dimensional diagram of a second wiring conductive block provided by an embodiment of the present invention; Fig.10 yes Fig. 9 A top view of the second wiring conductive block in; Fig.11 is a three-dimensional diagram of a third wiring conductive block provided by an embodiment of the present invention; Fig.12 yes Fig.11 A top view of the third wiring conductive block in FIG.

[0071] Optionally, based on the above technical solution, the thickness of the first terminal 201 is greater than the thickness of the second terminal 202, the thickness of the first terminal 201 is greater than the thickness of the third terminal 203, and the thickness of the second terminal 202 is equal to the thickness of the third terminal 203; Figure 7-Figure 12 As shown, the wiring conductive block 500 includes a first wiring conductive block 500a, a second wiring conductive block 500b and a third wiring conductive block 500c; the thickness of the first wiring conductive block 500a is greater than the thickness of the second wiring conductive block 500b, the thickness of the first wiring conductive block 500a is greater than the thickness of the third wiring conductive block 500c, and the thickness of the second wiring conductive block 500b is equal to the thickness of the third wiring conductive block 500c, so that the thickness of the wiring conductive block 500 and the corresponding connected wiring terminal match. Exemplarily, the thickness of the first wiring conductive block 500a is 19.1 mm, and the thickness of the second wiring conductive block 500b and the third wiring conductive block 500c are both 16.6 mm.

[0072] It should be noted that the size of the wiring conductive block 500 can be determined according to the size of the first terminal 201 , the second terminal 202 and the third terminal 203 of the three-phase full-bridge power module 200 and the size of the power cycle test fixture structure.

[0073] Optionally, based on the above technical solution, Figure 1 As shown, the device placement portion 101 is provided with a device placement slot V1 , and the device placement slot V1 can be used to place the three-phase full-bridge power module 200 .

[0074] Optionally, based on the above technical solution, Figure 1 As shown, the heat sink 100 includes a first substrate 01 and a second substrate 02; the first substrate 01 includes a first part 1A, a second part 1B and a third part 1C, the second part 1B is between the first part 1A and the third part 1C, and the second part 1B is used to support the second substrate 02; the second part 1B and the second substrate 02 constitute a device placement part 101, the first part 1A constitutes a first connecting part 102, and the third part 1C constitutes a second connecting part 103.

[0075] Specifically, the heat sink 100 includes a first substrate 01 and a second substrate 02 of different areas. The first substrate 01 and the second substrate 02 are fixedly connected by connecting members such as bolts. There is no need to groove the base material of the heat sink 100 to form the space required for the first insulating plate 300 and the second insulating plate 400, thereby reducing the preparation cost of the power cycle test tooling structure.

[0076] Optionally, based on the above technical solution, Figure 1 as well as Figure 7-Figure 12As shown, the wiring conductive block 500 is also provided with a large current heating wire terminal connection hole 503, and the large current heating wire terminal connection hole 503 is used to electrically connect the large current heating wire through the third connection structure; the first insulating plate 300 and / or the second insulating plate 400 are also used to support the third connection structure located in the large current heating wire terminal connection hole 503.

[0077] Specifically, when the wiring conductive block 500 is fixed to the first insulating plate 300, and the high-current heating wire terminal connection hole 503 of the wiring conductive block 500 is electrically connected to the high-current heating wire through the third connection structure, the first insulating plate 300 is used to support the third connection structure located at the high-current heating wire terminal connection hole 503. When the wiring conductive block 500 is fixed to the second insulating plate 400, and the high-current heating wire terminal connection hole 503 of the wiring conductive block 500 is electrically connected to the high-current heating wire through the third connection structure, the second insulating plate 400 is also used to support the third connection structure located at the high-current heating wire terminal connection hole 503. Compared with the structure in which the high-current heating wire terminal connection hole 503 and the third connection structure are suspended from the first insulating plate 300 and / or the second insulating plate 400, the above technical solution avoids the torque on the wiring terminal during the tightening or disassembly process, thereby avoiding the failure problem of the wiring terminal.

[0078] Optionally, the connection method of the wiring conductive block 500 and the first insulating plate 300 is threaded connection. The connection method of the wiring conductive block 500 and the second insulating plate 400 is threaded connection. The first connection structure, the second connection structure and the third connection structure are bolts, and the first mounting hole 301, the second mounting hole 401, the third mounting hole 501, the power terminal connection hole 502 and the high-current heating wire terminal connection hole 503 where the bolts are located are provided with a toothed cap to avoid failure of the threaded connection.

[0079] Optionally, based on the above technical solution, Figure 3It is shown that when a three-phase full-bridge power module 200 is placed in correspondence with a device placement portion 101 of a power cycle test fixture structure for a power cycle test, the first insulating plate 300 is provided with a first combination of mounting holes A1 and a second combination of mounting holes A2; the first combination of mounting holes A1 and the first terminal 201 are provided correspondingly, and the second combination of mounting holes A2 and the second terminal 202 are provided correspondingly; the first combination of mounting holes A1 includes a first vertical mounting hole a1, a second vertical mounting hole a2 and a first horizontal mounting hole b1, and the direction from the first vertical mounting hole a1 to the second vertical mounting hole a2 is the second direction (i.e., the direction in the figure Y direction), the connection line of the first vertical mounting hole a1, the second vertical mounting hole a2 and the first horizontal mounting hole b1 forms a triangle; the second mounting hole combination A2 includes the third vertical mounting hole a3, the fourth vertical mounting hole a4 and the second horizontal mounting hole b2, the first mounting hole 301 of the first mounting hole combination A1 and the first mounting hole 301 of the second mounting hole combination A2 are mirror images; in a certain phase of the three-phase full-bridge power module 200, the first horizontal mounting hole b1 is reused as the second horizontal mounting hole b2; the V phase 200b of the three-phase full-bridge power module is located between the U phase 200a and the W phase 200c, and the three-phase full-bridge The U phase 200a of the power module 200 includes a U phase lower bridge arm and a U phase upper bridge arm, the V phase 200b of the three-phase full-bridge power module 200 includes a V phase lower bridge arm and a V phase upper bridge arm, and the W phase 200c of the three-phase full-bridge power module 200 includes a W phase lower bridge arm and a W phase upper bridge arm; the third vertical mounting hole a3 of the U phase upper bridge arm is reused as the first vertical mounting hole a1 of the V phase lower bridge arm, and the fourth vertical mounting hole a4 of the U phase upper bridge arm is reused as the second vertical mounting hole a2 of the V phase lower bridge arm; the third vertical mounting hole a3 of the V phase upper bridge arm is reused as the first vertical mounting hole a1 of the W phase lower bridge arm, and the fourth vertical mounting hole a4 of the V phase upper bridge arm is reused as the second vertical mounting hole a2 of the V phase lower bridge arm. The vertical mounting hole a4 is reused as the second vertical mounting hole a2 of the W-phase lower bridge arm; the direction of the U-phase lower bridge arm pointing to the U-phase upper bridge arm is the direction of the first terminal 201 of the same phase in the three-phase full-bridge power module 200 pointing to the second terminal 202, the direction of the V-phase lower bridge arm pointing to the V-phase upper bridge arm is the direction of the first terminal 201 of the same phase in the three-phase full-bridge power module 200 pointing to the second terminal 202 (i.e., the Y direction in the figure), and the direction of the W-phase lower bridge arm pointing to the W-phase upper bridge arm is the direction of the first terminal 201 of the same phase in the three-phase full-bridge power module 200 pointing to the second terminal 202 (i.e., the Y direction in the figure).

[0080] Among them, the connection terminals of the lower bridge arm of any one of the U phase 200a, V phase 200b and W phase 200c in the three-phase full-bridge power module 200 include a first terminal 201 and a third terminal 203, and the connection terminals of the upper bridge arm of any one of the U phase 200a, V phase 200b and W phase 200c in the three-phase full-bridge power module 200 include a second terminal 202 and a third terminal 203.

[0081] Specifically, the above technical solution provides a specific solution that the first mounting holes 301 corresponding to the first terminal 201 and the second terminal 202 of a certain phase of the three-phase full-bridge power module 200 and the adjacent phases of the three-phase full-bridge power module 200 are shared. Among them, the first mounting hole combination A1 and the second mounting hole combination A2 are both provided with three first mounting holes 301. On the basis of ensuring a small number of first mounting holes 301, the wiring conductive block 500 electrically connected to the first terminal 201 or the second terminal 202 is fixed to the three first mounting holes 301 of the first insulating plate 300 through the second connection structure and the three third mounting holes 501, and the firmness of the fixing structure is relatively high.

[0082] Optionally, based on the above technical solution, Figure 3 As shown, on the second insulating plate 400, in the second direction, two adjacent groups of mounting hole combinations corresponding to the third terminal 203 of any one of the U phase 200a, the V phase 200b and the W phase 200c of the three-phase full-bridge power module 200 include a third mounting hole combination A3 and a fourth mounting hole combination A4, and the direction in which the third mounting hole combination A3 points to the fourth mounting hole combination A4 is the second direction (i.e., the Y direction in the figure); the third mounting hole combination A3 includes a fifth vertical mounting hole a5, a sixth vertical mounting hole a6 and a third horizontal mounting hole b3, and the direction in which the fifth vertical mounting hole a5 points to the sixth vertical mounting hole a6 is the second direction The fourth combination A4 of mounting holes includes the seventh vertical mounting hole a7, the eighth vertical mounting hole a8 and the fourth horizontal mounting hole b4, the direction in which the seventh vertical mounting hole a7 points to the eighth vertical mounting hole a8 is the second direction (i.e. the Y direction in the figure), and the lines connecting the seventh vertical mounting hole a7, the eighth vertical mounting hole a8 and the fourth horizontal mounting hole b4 form a triangle; the sixth vertical mounting hole a6 of the third combination A3 of mounting holes is reused as the seventh vertical mounting hole a7 of the fourth combination A4 of mounting holes.

[0083] Specifically, the above technical solution provides a specific solution that the second mounting holes 401 of any two sets of mounting holes arranged adjacently in the second direction are shared. In the second direction, the two sets of mounting holes arranged adjacently corresponding to the third terminal 203 are both provided with three second mounting holes 401. On the basis of ensuring a small number of second mounting holes 401, the wiring conductive block 500 electrically connected to the third terminal 203 is fixed to the three second mounting holes 401 of the second insulating plate 400 through the second connection structure and the three third mounting holes 501. The firmness of the fixing structure is relatively high.

[0084] Optionally, based on the above technical solution, Figure 4It is shown that when a three-phase full-bridge power module 200 is placed in a device placement part 101 of a power cycle test fixture structure for a power cycle test, the first insulating plate 300 is provided with a first combination of mounting holes A1 and a second combination of mounting holes A2; the first combination of mounting holes A1 and the first terminal 201 are provided correspondingly, and the second combination of mounting holes A2 and the second terminal 202 are provided correspondingly; the first combination of mounting holes A1 includes a fifth transverse mounting hole b5 and a sixth transverse mounting hole b6, and the direction from the fifth transverse mounting hole b5 to the sixth transverse mounting hole b6 is a first direction (X direction in the figure); the mounting holes A1 and the sixth transverse mounting hole b6 are provided correspondingly. The second hole combination A2 includes a seventh transverse mounting hole b7 and an eighth transverse mounting hole b8, and the direction in which the seventh transverse mounting hole b7 points to the eighth transverse mounting hole b8 is the first direction (the X direction in the figure); in a certain phase of the three-phase full-bridge power module 200, the sixth transverse mounting hole b6 is reused as the seventh transverse mounting hole b7; the V phase 200b of the three-phase full-bridge power module 200 is located between the U phase 200a and the W phase 200c, the U phase 200a of the three-phase full-bridge power module 200 includes a U phase lower bridge arm and a U phase upper bridge arm, and the V phase 200b of the three-phase full-bridge power module 200 includes a V phase lower bridge arm and a W phase upper bridge arm. The V-phase upper bridge arm, the W-phase 200c of the three-phase full-bridge power module 200 includes the W-phase lower bridge arm and the W-phase upper bridge arm; the eighth transverse mounting hole b8 of the U-phase upper bridge arm is reused as the fifth transverse mounting hole b5 of the V-phase lower bridge arm; the eighth transverse mounting hole b8 of the V-phase upper bridge arm is reused as the fifth transverse mounting hole b5 of the W-phase lower bridge arm; the direction from the U-phase lower bridge arm to the U-phase upper bridge arm is the direction from the first terminal 201 of the same phase in the three-phase full-bridge power module to the second terminal 202, and the direction from the V-phase lower bridge arm to the V-phase upper bridge arm is the direction from the first terminal 201 of the same phase in the three-phase full-bridge power module to the second terminal 202. The direction of the second terminal 202, the direction of the W-phase lower bridge arm pointing to the W-phase upper bridge arm is the direction of the first terminal 201 of the same phase in the three-phase full-bridge power module 200 pointing to the second terminal 202; wherein, the connection terminals of the lower bridge arm of any one of the U-phase 200a, V-phase 200b and W-phase 200c in the three-phase full-bridge power module 200 include the first terminal 201 and the third terminal 203, and the connection terminals of the upper bridge arm of any one of the U-phase 200a, V-phase 200b and W-phase 200c in the three-phase full-bridge power module 200 include the second terminal 202 and the third terminal 203.

[0085] Specifically, the above technical solution provides a specific solution that the first mounting holes 301 corresponding to the first terminal 201 and the second terminal 202 of a certain phase of the three-phase full-bridge power module 200 and the adjacent phases of the three-phase full-bridge power module 200 are shared. Among them, the first mounting hole combination A1 and the second mounting hole combination A2 are both provided with two first mounting holes 301. On the basis of ensuring a small number of first mounting holes 301, the wiring conductive block 500 electrically connected to the first terminal 201 or the second terminal 202 is fixed to the two first mounting holes 301 of the first insulating plate 300 through the second connection structure and the two third mounting holes 501, and the firmness of the fixing structure is relatively high.

[0086] Optionally, based on the above technical solution, Figure 4 As shown, on the second insulating plate 400, in the second direction (Y direction in the figure), two adjacent groups of mounting hole combinations corresponding to the third terminal 203 include a third mounting hole combination A3 and a fourth mounting hole combination A4, and the direction in which the third mounting hole combination A3 points to the fourth mounting hole combination A4 is the second direction (Y direction in the figure); the third mounting hole combination A3 includes a ninth vertical mounting hole a9 and a tenth vertical mounting hole a10, and the direction in which the ninth vertical mounting hole a9 points to the tenth vertical mounting hole a10 is the second direction (Y direction in the figure); the fourth mounting hole combination A4 includes an eleventh vertical mounting hole a11 and a twelfth vertical mounting hole a12, and the direction in which the eleventh vertical mounting hole a11 points to the twelfth vertical mounting hole a12 is the second direction (Y direction in the figure); the tenth vertical mounting hole a10 is reused as the eleventh vertical mounting hole a11.

[0087] Specifically, the above technical solution provides a specific solution in which the second mounting holes 401 of any two sets of mounting holes arranged adjacently in the second direction (Y direction in the figure) are shared. Among them, in the second direction, the two sets of mounting holes arranged adjacently corresponding to the third terminal 203 are both provided with two second mounting holes 401. On the basis of ensuring a small number of second mounting holes 401, the wiring conductive block 500 electrically connected to the third terminal 203 is fixed to the two second mounting holes 401 of the second insulating plate 400 through the second connection structure and the two third mounting holes 501, and the firmness of the fixing structure is relatively high.

[0088] Optionally, based on the above technical solution, Figure 3 and Figure 4As shown, the three-phase full-bridge power module 200 includes a U phase 200a, a V phase 200b and a W phase 200c; the V phase 200b is located between the U phase 200a and the W phase 200c; the connection scheme of the wiring terminals of the three-phase full-bridge power module 200 includes: one of the first terminal 201 and the second terminal 202 of the U phase 200a of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; one of the first terminal 201 and the second terminal 202 of the V phase 200b of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; the first terminal 201 of the W phase 200c of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; 1 and one of the second terminals 202 are connected to the wiring conductive block 500; the third terminals 203 of the U phase 200a, V phase 200b and W phase 200c of the three-phase full-bridge power module 200 are all connected to the wiring conductive block 500; or, one of the first terminal 201 and the second terminal 202 of the U phase 200a of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; the third terminal 203 of the U phase 200a of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; one of the first terminal 201 and the second terminal 202 of the W phase 200c of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500. The third terminal 203 of the W phase 200c of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; or, one of the first terminal 201 and the second terminal 202 of the selected phase of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; the third terminal 203 of the selected phase of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; the selected phase is any one of the U phase 200a, V phase 200b and W phase 200c of the three-phase full-bridge power module 200; during the test, when the U phase 200a, V phase 200b and W phase 200c of the three-phase full-bridge power module 200 are selected When the first terminal 201 and the third terminal 203 of any one of the W phases 200c are electrically connected through the first connection structure and the power terminal connection hole 502 of the wiring conductive block 500, the first terminal 201 is used to connect the negative pole of the power supply, and the third terminal 203 is used to connect the positive pole of the power supply; when the second terminal 202 and the third terminal 203 of any one of the U phase 200a, V phase 200b and W phase 20c of the three-phase full-bridge power module 200 are selected to be electrically connected through the first connection structure and the power terminal connection hole 502 of the wiring conductive block 500, the second terminal 202 is used to connect the positive pole of the power supply, and the third terminal 203 is used to connect the negative pole of the power supply.

[0089] like Fig.13As shown, one of the first terminal 201 and the second terminal 202 of the U phase 200a of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; one of the first terminal 201 and the second terminal 202 of the V phase 200b of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; one of the first terminal 201 and the second terminal 202 of the W phase 200c of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; the third terminal 203 of the U phase 200a, the V phase 200b and the W phase 200c of the three-phase full-bridge power module 200 are all connected to the wiring conductive block 500. In the above scheme, the connection method of the wiring terminal and the wiring conductive block 500 includes 8 connection methods.

[0090] like Fig.14 As shown, one of the first terminal 201 and the second terminal 202 of the U phase 200a of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; the third terminal 203 of the U phase 200a of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; one of the first terminal 201 and the second terminal 202 of the W phase 200c of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; the third terminal 203 of the W phase 200c of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500. In the above scheme, the connection method of the wiring terminal and the wiring conductive block 500 includes 4 connection methods.

[0091] One of the first terminal 201 and the second terminal 202 of the selected phase of the three-phase full-bridge power module 200 is connected to the wiring conductive block 500; the third terminal 203 of the selected power module is connected to the wiring conductive block 500; the selected phase of the three-phase full-bridge power module 200 is any one of the U phase 200a, the V phase 200b and the W phase 200c.

[0092] like Figure 1 and Fig.15 As shown, the selected phase of the three-phase full-bridge power module 200 is the U phase 200a. Figure 1 As shown, the first terminal 201 of the U phase 200a is connected to the wiring conductive block 500; the third terminal 203 of the U phase 200a is connected to the wiring conductive block 500; Fig.15 As shown, the second terminal 202 of the U phase 200 a is connected to the wiring conductive block 500 ; and the third terminal 203 of the U phase 200 a is connected to the wiring conductive block 500 .

[0093] like Fig.16 and Fig.17 As shown, the selected phase of the three-phase full-bridge power module 200 is the V phase 200b. Fig.16 As shown, the first terminal 201 of the V phase 200b is connected to the wiring conductive block 500; the third terminal 203 of the V phase 200b is connected to the wiring conductive block 500; Fig.17 As shown, the second terminal 202 of the V phase 200 b is connected to the wiring conductive block 500 ; and the third terminal 203 of the V phase 200 b is connected to the wiring conductive block 500 .

[0094] like Fig.18 and Fig.19 As shown, the selected phase of the three-phase full-bridge power module 200 is the W phase 200c. Fig.18 As shown, the first terminal 201 of the W phase 200c is connected to the wiring conductive block 500; the third terminal 203 of the W phase 200c is connected to the wiring conductive block 500; Fig.19 As shown, the second terminal 202 of the W phase 200 c is connected to the wiring conductive block 500 ; and the third terminal 203 of the W phase 200 c is connected to the wiring conductive block 500 .

[0095] like Figure 3 As shown, the first terminal 201 of the U phase 200a is also called the terminal N1, the second terminal 202 is also called the terminal P1, and the third terminal 203 is also called the terminal U. The first terminal 201 of the V phase 200b is also called the terminal N2, the second terminal 202 is also called the terminal P2, and the third terminal 203 is also called the terminal V. The first terminal 201 of the W phase 200c is also called the terminal N3, the second terminal 202 is also called the terminal P3, and the third terminal 203 is also called the terminal W.

[0096] Optionally, based on the above technical solution, the first insulating plate 300 is a whole insulating plate or is composed of a plurality of first splicing sub-plates. And / or, the second insulating plate 400 is a whole insulating plate or is composed of a plurality of second splicing sub-plates.

[0097] Optionally, based on the above technical solution, in the second insulating plate 400 , the vertical distance between the mounting hole combination and the device placement portion 101 matches the length of the corresponding third terminal 203 extending above the second insulating plate 400 . Fig. 20 and Fig.13 The difference is that Fig. 20 In the embodiment, the third terminals 203 of the U-phase 200 a , the V-phase 200 b , and the W-phase 200 c of the three-phase full-bridge power module 200 extend longer above the second insulating plate 400 .

[0098] Specifically, in the second direction (i.e. Figure 1 The plurality of second mounting holes 401 include at least two groups of mounting hole combinations spaced apart, and the corresponding mounting hole group can be selected according to the length of the third terminal 203 extending above the second insulating plate 400, so that the tooling structure can be compatible with a plurality of three-phase full-bridge power modules 200 with similar packaging structures, thereby avoiding the need for a set of test tooling structures for a three-phase full-bridge power module with one packaging structure, reducing manufacturing costs, and improving the convenience of maintenance and use.

[0099] The embodiment of the present invention also provides a method for manufacturing a power cycle test fixture structure. Fig.17 As shown, Fig.17 1 is a flow chart of a method for manufacturing a power cycle test fixture structure provided by an embodiment of the present invention. The method for manufacturing a power cycle test fixture structure comprises the following steps:

[0100] S110. Provide a heat sink, the heat sink comprising a device placement portion, a first connection portion, and a second connection portion, wherein the device placement portion is located between the first connection portion and the second connection portion; the device placement portion is used to place a three-phase full-bridge power module.

[0101] 120. Provide a wiring conductive block, wherein the wiring conductive block is provided with a third mounting hole and a power terminal connection hole, and the power terminal connection hole is used to connect a wiring terminal of a three-phase full-bridge power module.

[0102] S130, forming a first insulating plate, wherein the first insulating plate is fixed to the first connecting portion; and the first insulating plate is provided with a plurality of first mounting holes.

[0103] S140, forming a second insulating plate, wherein the second insulating plate is fixed to the second connecting portion; the second insulating plate is provided with a plurality of second mounting holes.

[0104] Among them, the two wiring conductive blocks are fixed to the first insulating plate along the first direction by at least one first mounting hole cooperating with the third mounting hole; the first direction is perpendicular to the direction of the first connecting part pointing to the second connecting part; and / or, the two wiring conductive blocks are fixed to the second insulating plate along the second direction by at least one second mounting hole cooperating with the third mounting hole; the second direction is the direction of the first connecting part pointing to the second connecting part.

[0105] Optionally, the power cycle test fixture structure is used to perform a power cycle test on a three-phase full-bridge power module 200, wherein the three-phase full-bridge power module 200 includes a U phase 200a, a V phase 200b and a W phase 200c, and the connection terminals of the U phase 200a, the V phase 200b and the W phase 200c of the three-phase full-bridge power module 200 all include a first terminal 201, a second terminal 202 and a third terminal 203; the first terminal 201 and the second terminal 202 face the first connection portion 102, and the third terminal 203 faces the second connection portion 103; In the first direction, the first mounting holes 301 corresponding to the first terminals 201 and the second terminals 202 of any one of the U phase 200a, V phase 200b and W phase 200c of the three-phase full-bridge power module 200 and the adjacent phases of the three-phase full-bridge power module 200 are all shared; In the second direction, the plurality of second mounting holes 401 include at least two groups of mounting hole combinations arranged at intervals; The first mounting holes 301 corresponding to the first terminals 201 and the second terminals 202 of any one of the U phase 200a, V phase 200b and W phase 200c of the three-phase full-bridge power module 200 are shared; The third terminal 203 is arranged correspondingly to at least two groups of mounting hole combinations; in the second direction, the second mounting holes 401 of any two groups of mounting hole combinations arranged adjacently are shared; the first terminal 201 and the third terminal 203 or the second terminal 202 and the third terminal 203 of any one phase of the U phase 200a, the V phase 200b and the W phase 200c included in the three-phase full-bridge power module 200 are electrically connected through the first connection structure and the power terminal connection hole 502 of the wiring conductive block 500; and the first terminal 201 or the second terminal The wiring conductive block 500 electrically connected to the third terminal 202 is fixed to at least two first mounting holes 301 of the first insulating plate 300 through a second connecting structure and at least two third mounting holes 501, and the third mounting holes 501 and the first mounting holes 301 are arranged in a one-to-one correspondence; the wiring conductive block 500 electrically connected to the third terminal 203 is fixed to at least two second mounting holes 401 of the second insulating plate 400 through a second connecting structure and at least two third mounting holes 501, and the third mounting holes 501 and the second mounting holes 401 are arranged in a one-to-one correspondence.

[0106] Optionally, S110 provides a heat sink including:

[0107] A first substrate is provided. The first substrate includes a first portion, a second portion and a third portion. The second portion is between the first portion and the third portion.

[0108] A second substrate is formed on one side of the second part, and the second part is used to support the second substrate, wherein the second part and the second substrate constitute a device placement portion, the first part constitutes a first connecting portion, and the third part constitutes a second connecting portion.

[0109] The power cycle test fixture structure obtained by the manufacturing method of the power cycle test fixture structure provided by the embodiment of the present invention, the device placement part 101 of the heat sink 100 can be placed corresponding to a three-phase full-bridge power module 200. In actual testing, the number of power cycle test fixture structures can be selected according to the test capability and test requirements of the power cycle test equipment, and the three-phase full-bridge power module 200 is placed in the device placement part 101 of at least one power cycle test fixture structure for power cycle testing. The first terminal 201 and the third terminal 203 or the second terminal 202 and the third terminal 203 of any one phase of the U phase 200a, the V phase 200b and the W phase 200c included in the three-phase full-bridge power module 200 are electrically connected through the first connection structure and the power terminal connection hole 502 of the wiring conductive block 500, that is, the first terminal 201 and the second terminal 202 of the same phase of the three-phase full-bridge power module 200 will not be electrically connected to the wiring conductive block 500 at the same time. The first mounting holes 301 corresponding to the first terminals 201 and the second terminals 202 of any one of the U phase 200a, V phase 200b and W phase 200c included in the three-phase full-bridge power module 200 and the adjacent phases of the three-phase full-bridge power module 200 are shared, and in the second direction, the second mounting holes 401 of any two groups of mounting holes arranged adjacently on the second insulating plate 400 are shared, which reduces the number of the first mounting holes 301 on the first insulating plate 300 and the second mounting holes 401 on the second insulating plate 400, and at the same time reduces the number of wiring conductive blocks 500 fixed on the first insulating plate 300 and the second insulating plate 400 at the same time, thereby reducing the manufacturing cost of the power cycle test fixture structure. Figure 1 The plurality of second mounting holes 401 include at least two groups of mounting hole combinations spaced apart, and the corresponding mounting hole group can be selected according to the length of the third terminal 203 extending above the second insulating plate 400, so that the tooling structure can be compatible with a plurality of three-phase full-bridge power modules 200 with similar packaging structures, thereby avoiding the need for a set of test tooling structures for a three-phase full-bridge power module 200 with a packaging structure, reducing manufacturing costs, and improving the convenience of maintenance and use.

[0110] The embodiment of the present invention also provides a flow chart of a power module testing method. Fig.18 As shown, Fig.18 1 is a flow chart of a power module testing method provided by an embodiment of the present invention, and the power module testing method comprises the following steps:

[0111] S210. According to the test capability and test requirements of the power cycle test fixture structure, select the number N of three-phase full-bridge power modules to be tested in one test and the number N of power cycle test fixture structures, where the value of N includes an integer greater than or equal to 1; the power cycle test fixture structure is such as any power cycle test fixture structure in the embodiments of the present invention.

[0112] S220. Install three-phase full-bridge power modules one by one on the device placement part of the power cycle test fixture structure.

[0113] S230. Fix the wiring conductive blocks on the first insulating plate and / or the second insulating plate according to the test requirements.

[0114] Among them, the two wiring conductive blocks are fixed to the first insulating plate along the first direction by at least one first mounting hole cooperating with the third mounting hole; the first direction is perpendicular to the direction of the first connecting part pointing to the second connecting part; and / or, the two wiring conductive blocks are fixed to the second insulating plate along the second direction by at least one second mounting hole cooperating with the third mounting hole; the second direction is the direction of the first connecting part pointing to the second connecting part.

[0115] S240: Introduce coolant into the coolant channel of the radiator.

[0116] S250. Test N three-phase full-bridge power modules.

[0117] Optionally, based on the above technical solution, during actual testing, one or more power cycle test fixture structures are selected according to the test capability and test requirements of the power cycle test equipment, and a corresponding number of three-phase full-bridge power modules are placed in the device placement part of the power cycle test fixture structure to perform a power cycle test, and different power cycle test fixture structures are connected in series or in parallel.

[0118] Optionally, based on the above technical solution, when S240 electrically connects the first terminal and the third terminal or the second terminal and the third terminal of the power module and the power terminal connection hole of the wiring conductive block through the first connection structure, it also includes:

[0119] The high-current heating wire terminal connection hole of the wiring conductive block and the high-current heating wire are electrically connected through the third connection structure.

[0120] The power module testing method provided in the embodiment of the present invention adopts any power cycle test fixture structure in the embodiment of the present invention for testing, including any intended effects of any power cycle test fixture structure in the embodiment of the present invention, which will not be repeated here.

[0121] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0122] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power cycle test fixture structure, characterized in that: include: A heat sink, the heat sink comprising a device placement portion, a first connection portion and a second connection portion, the device placement portion being located between the first connection portion and the second connection portion; the device placement portion being used to place a three-phase full-bridge power module; A wiring conductive block, wherein the wiring conductive block is provided with a third mounting hole and a power terminal connection hole, wherein the power terminal connection hole is used to connect a wiring terminal of the three-phase full-bridge power module; A first insulating plate is fixed to the first connecting portion; the first insulating plate is provided with a plurality of first mounting holes; A second insulating plate is fixed to the second connecting part; the second insulating plate is provided with a plurality of second mounting holes; the two wiring conductive blocks are fixed to the first insulating plate along a first direction through at least one of the first mounting holes cooperating with the third mounting hole; the first direction is perpendicular to the direction of the first connecting part pointing to the second connecting part; and / or, the two wiring conductive blocks are fixed to the second insulating plate along a second direction through at least one of the second mounting holes cooperating with the third mounting hole; the second direction is the direction of the first connecting part pointing to the second connecting part.

2. The power cycle test fixture structure according to claim 1, characterized in that: The power cycle test fixture structure is used to perform a power cycle test on the three-phase full-bridge power module, the three-phase full-bridge power module includes a U phase, a V phase and a W phase, and the U phase, V phase and W phase connection terminals of the three-phase full-bridge power module each include a first terminal, a second terminal and a third terminal; the first terminal and the second terminal face the first connecting portion, and the third terminal faces the second connecting portion; In the first direction, the first mounting holes corresponding to the first terminals and the second terminals of any one of the U phase, the V phase and the W phase of the three-phase full-bridge power module and the adjacent phases of the three-phase full-bridge power module are shared; In the second direction, the plurality of second mounting holes include at least two groups of mounting hole combinations arranged at intervals; the third terminal of any one of the U phase, V phase and W phase of the three-phase full-bridge power module and at least two groups of the mounting hole combinations are arranged correspondingly; in the second direction, the second mounting holes of any two adjacent groups of the mounting hole combinations are shared; The first terminal and the third terminal or the second terminal and the third terminal of any one phase of the U phase, V phase and W phase of the three-phase full-bridge power module are electrically connected through the first connecting structure and the power terminal connecting hole of the wiring conductive block; the wiring conductive block electrically connected to the first terminal or the second terminal is fixed to at least two of the first mounting holes of the first insulating plate through the second connecting structure and at least two of the third mounting holes, and the third mounting holes and the first mounting holes are arranged in a one-to-one correspondence; the wiring conductive block electrically connected to the third terminal is fixed to at least two of the second mounting holes of the second insulating plate through the second connecting structure and at least two of the third mounting holes, and the third mounting holes and the second mounting holes are arranged in a one-to-one correspondence.

3. The power cycle test fixture structure according to claim 2, characterized in that: The first insulating plate and / or the second insulating plate are also used to support the first connecting structure and the second connecting structure.

4. The power cycle test fixture structure according to claim 2, characterized in that: The thickness of the first terminal is greater than the thickness of the second terminal, the thickness of the first terminal is greater than the thickness of the third terminal, and the thickness of the second terminal is equal to the thickness of the third terminal; the thickness of the first terminal in the U phase, V phase and W phase of the three-phase full-bridge power module is the same, the thickness of the second terminal in the U phase, V phase and W phase of the three-phase full-bridge power module is the same, and the thickness of the third terminal in the U phase, V phase and W phase of the three-phase full-bridge power module is the same; The wiring conductive blocks include a first wiring conductive block, a second wiring conductive block and a third wiring conductive block; The thickness of the first wiring conductive block is greater than the thickness of the second wiring conductive block, and the thickness of the first wiring conductive block is greater than the thickness of the third wiring conductive block; The thickness of the second wiring conductive block is equal to the thickness of the third wiring conductive block.

5. The power cycle test fixture structure according to claim 1, characterized in that: The device placement portion is provided with a device placement groove, and the device placement groove can be used to place the three-phase full-bridge power module.

6. The power cycle test fixture structure according to claim 1, characterized in that: The heat sink includes a first substrate and a second substrate; The first substrate comprises a first portion, a second portion and a third portion, the second portion is between the first portion and the third portion, and the second portion is used to support the second substrate; The second portion and the second substrate constitute the device placement portion, the first portion constitutes the first connection portion, and the third portion constitutes the second connection portion.

7. The power cycle test fixture structure according to claim 1, characterized in that: The wiring conductive block is also provided with a high-current heating wire terminal connection hole, and the high-current heating wire terminal connection hole is used to electrically connect with the high-current heating wire through the third connection structure; The first insulating plate and / or the second insulating plate are also used to support the third connection structure located at the connection hole of the high-current heating wire terminal.

8. The power cycle test fixture structure according to claim 2, characterized in that: The first insulating plate is provided with a first group of mounting holes and a second group of mounting holes; the first group of mounting holes is provided correspondingly to the first terminal, and the second group of mounting holes is provided correspondingly to the second terminal; The first combination of mounting holes includes a first vertical mounting hole, a second vertical mounting hole and a first horizontal mounting hole, the direction in which the first vertical mounting hole points to the second vertical mounting hole is the second direction, and the connecting line of the first vertical mounting hole, the second vertical mounting hole and the first horizontal mounting hole forms a triangle; The second combination of mounting holes comprises a third vertical mounting hole, a fourth vertical mounting hole and a second horizontal mounting hole, and the first mounting hole of the first combination of mounting holes and the first mounting hole of the second combination of mounting holes are arranged in a mirror image; In the power modules of the same phase, the first horizontal mounting hole is reused as the second horizontal mounting hole; the two power modules of different phases arranged adjacently include a first power module and a second power module, the third vertical mounting hole of the first power module is reused as the first vertical mounting hole of the second power module, the fourth vertical mounting hole of the first power module is reused as the second vertical mounting hole of the second power module, and the direction from the first power module to the second power module is the direction from the first terminal to the second terminal in the same power module; In a certain phase of the three-phase full-bridge power module, the first transverse mounting hole is reused as the second transverse mounting hole; The V phase of the three-phase full-bridge power module is located between the U phase and the W phase, the U phase of the three-phase full-bridge power module includes the U phase lower bridge arm and the U phase upper bridge arm, the V phase of the three-phase full-bridge power module includes the V phase lower bridge arm and the V phase upper bridge arm, and the W phase of the three-phase full-bridge power module includes the W phase lower bridge arm and the W phase upper bridge arm; The third vertical mounting hole of the U-phase upper bridge arm is reused as the first vertical mounting hole of the V-phase lower bridge arm, and the fourth vertical mounting hole of the U-phase upper bridge arm is reused as the second vertical mounting hole of the V-phase lower bridge arm; The third vertical mounting hole of the V-phase upper bridge arm is reused as the first vertical mounting hole of the W-phase lower bridge arm, and the fourth vertical mounting hole of the V-phase upper bridge arm is reused as the second vertical mounting hole of the W-phase lower bridge arm; The direction of the U-phase lower bridge arm pointing to the U-phase upper bridge arm is the direction of the first terminal pointing to the second terminal of the same phase in the three-phase full-bridge power module, the direction of the V-phase lower bridge arm pointing to the V-phase upper bridge arm is the direction of the first terminal pointing to the second terminal of the same phase in the three-phase full-bridge power module, and the direction of the W-phase lower bridge arm pointing to the W-phase upper bridge arm is the direction of the first terminal pointing to the second terminal of the same phase in the three-phase full-bridge power module; The connection terminals of the lower bridge arm of any one of the U phase, V phase and W phase in the three-phase full-bridge power module include the first terminal and the third terminal, and the connection terminals of the upper bridge arm of any one of the U phase, V phase and W phase in the three-phase full-bridge power module include the second terminal and the third terminal.

9. The power cycle test fixture structure according to claim 2 or 8, characterized in that: On the second insulating plate, in the second direction, two adjacent groups of the mounting hole combinations corresponding to the third terminal of any one of the U phase, V phase and W phase of the three-phase full-bridge power module include a third mounting hole combination and a fourth mounting hole combination, and the direction from the third mounting hole combination to the fourth mounting hole combination is the second direction; The third combination of mounting holes includes a fifth vertical mounting hole, a sixth vertical mounting hole and a third horizontal mounting hole, the direction in which the fifth vertical mounting hole points to the sixth vertical mounting hole is the second direction, and the connecting line of the fifth vertical mounting hole, the sixth vertical mounting hole and the third horizontal mounting hole forms a triangle; The fourth combination of mounting holes includes a seventh vertical mounting hole, an eighth vertical mounting hole and a fourth horizontal mounting hole, the direction in which the seventh vertical mounting hole points to the eighth vertical mounting hole is the second direction, and the connecting line of the seventh vertical mounting hole, the eighth vertical mounting hole and the fourth horizontal mounting hole forms a triangle; The sixth vertical mounting hole is reused as the seventh vertical mounting hole.

10. The power cycle test fixture structure according to claim 2, characterized in that: The first insulating plate is provided with a first group of mounting holes and a second group of mounting holes; the first group of mounting holes is provided correspondingly to the first terminal, and the second group of mounting holes is provided correspondingly to the second terminal; The first combination of mounting holes includes a fifth transverse mounting hole and a sixth transverse mounting hole, and the direction from the fifth transverse mounting hole to the sixth transverse mounting hole is the first direction; The second set of mounting holes includes a seventh transverse mounting hole and an eighth transverse mounting hole, and the direction from the seventh transverse mounting hole to the eighth transverse mounting hole is the first direction; In a certain phase of the three-phase full-bridge power module, the sixth transverse mounting hole is reused as the seventh transverse mounting hole; The V phase of the three-phase full-bridge power module is located between the U phase and the W phase, the U phase of the three-phase full-bridge power module includes the U phase lower bridge arm and the U phase upper bridge arm, the V phase of the three-phase full-bridge power module includes the V phase lower bridge arm and the V phase upper bridge arm, and the W phase of the three-phase full-bridge power module includes the W phase lower bridge arm and the W phase upper bridge arm; The eighth transverse mounting hole of the U-phase upper bridge arm is reused as the fifth transverse mounting hole of the V-phase lower bridge arm; The eighth transverse mounting hole of the V-phase upper bridge arm is reused as the fifth transverse mounting hole of the W-phase lower bridge arm; The direction of the U-phase lower bridge arm pointing to the U-phase upper bridge arm is the direction of the first terminal pointing to the second terminal of the same phase in the three-phase full-bridge power module, the direction of the V-phase lower bridge arm pointing to the V-phase upper bridge arm is the direction of the first terminal pointing to the second terminal of the same phase in the three-phase full-bridge power module, and the direction of the W-phase lower bridge arm pointing to the W-phase upper bridge arm is the direction of the first terminal pointing to the second terminal of the same phase in the three-phase full-bridge power module; The connection terminals of the lower bridge arm of any one of the U phase, V phase and W phase in the three-phase full-bridge power module include the first terminal and the third terminal, and the connection terminals of the upper bridge arm of any one of the U phase, V phase and W phase in the three-phase full-bridge power module include the second terminal and the third terminal.

11. The power cycle test fixture structure according to claim 2 or 10, characterized in that: On the second insulating plate, in the second direction, two adjacent groups of the mounting hole combinations corresponding to the third terminal of any one of the U phase, V phase and W phase of the three-phase full-bridge power module include a third mounting hole combination and a fourth mounting hole combination, and the direction from the third mounting hole combination to the fourth mounting hole combination is the second direction; The third combination of mounting holes includes a ninth vertical mounting hole and a tenth vertical mounting hole, and the direction from the ninth vertical mounting hole to the tenth vertical mounting hole is the second direction; The fourth combination of mounting holes includes an eleventh vertical mounting hole and a twelfth vertical mounting hole, and the direction from the eleventh vertical mounting hole to the twelfth vertical mounting hole is the second direction; The tenth vertical mounting hole is reused as the eleventh vertical mounting hole.

12. The power cycle test fixture structure according to claim 2, characterized in that: In the three-phase full-bridge power module, the V phase is located between the U phase and the W phase; The connection scheme of the wiring terminals of the three-phase full-bridge power module includes: One of the first terminal and the second terminal of the U phase of the three-phase full-bridge power module is connected to the wiring conductive block; one of the first terminal and the second terminal of the V phase of the three-phase full-bridge power module is connected to the wiring conductive block; one of the first terminal and the second terminal of the W phase of the three-phase full-bridge power module is connected to the wiring conductive block; the third terminals of the U phase, V phase and W phase of the three-phase full-bridge power module are all connected to the wiring conductive block; Alternatively, one of the first terminal and the second terminal of the U phase of the three-phase full-bridge power module is connected to the wiring conductive block; the third terminal of the U phase of the three-phase full-bridge power module is connected to the wiring conductive block; one of the first terminal and the second terminal of the W phase of the three-phase full-bridge power module is connected to the wiring conductive block; the third terminal of the W phase of the three-phase full-bridge power module is connected to the wiring conductive block; Alternatively, one of the first terminal and the second terminal of the selected phase of the three-phase full-bridge power module is connected to the wiring conductive block; the third terminal of the selected phase is connected to the wiring conductive block; the selected phase is any one of the U phase, V phase and W phase of the three-phase full-bridge power module; During the test, when the first terminal and the third terminal of any one of the U phase, the V phase and the W phase of the three-phase full-bridge power module are electrically connected through the first connection structure and the power terminal connection hole of the wiring conductive block, the first terminal is used to connect the negative electrode of the power supply, and the third terminal is used to connect the positive electrode of the power supply; When the second terminal and the third terminal of any one of the U phase, V phase and W phase of the three-phase full-bridge power module are selected to be electrically connected through the first connection structure and the power terminal connection hole of the wiring conductive block, the second terminal is used to connect the positive pole of the power supply, and the third terminal is used to connect the negative pole of the power supply.

13. The power cycle test fixture structure according to claim 1, characterized in that: The first insulating board is a whole insulating board or is composed of a plurality of first splicing sub-boards; And / or, the second insulating board is a whole insulating board or is formed by splicing a plurality of second splicing sub-boards.

14. The power cycle test fixture structure according to claim 2, characterized in that: In the second insulating plate, the vertical distance between the mounting hole combination and the device placement portion matches the length of the third terminal corresponding thereto extending to above the second insulating plate.

15. The power cycle test fixture structure according to claim 1, characterized in that: The third mounting hole is a countersunk hole.

16. The power cycle test fixture structure according to claim 1, characterized in that: The first insulating plate is provided with a fourth mounting hole, and the first insulating plate is fixed to the sixth mounting hole of the first connecting portion through the fourth mounting hole and the fourth connecting structure; The second insulating plate is provided with a seventh mounting hole, and the second insulating plate is fixed to the eighth mounting hole of the second connecting portion through the seventh mounting hole and the fifth connecting structure.

17. The power cycle test fixture structure according to claim 16, characterized in that: The fourth mounting hole is a countersunk hole, and / or the seventh mounting hole is a countersunk hole.

18. A method for manufacturing a power cycle test fixture structure, characterized in that: include: A heat sink is provided, the heat sink comprising a device placement portion, a first connection portion, and a second connection portion, the device placement portion is located between the first connection portion and the second connection portion; the device placement portion is used to place a three-phase full-bridge power module; Providing a wiring conductive block, wherein the wiring conductive block is provided with a third mounting hole and a power terminal connection hole, wherein the power terminal connection hole is used to connect a wiring terminal of the three-phase full-bridge power module; forming a first insulating plate, wherein the first insulating plate is fixed to the first connecting portion; and the first insulating plate is provided with a plurality of first mounting holes; forming a second insulating plate, wherein the second insulating plate is fixed to the second connecting portion; the second insulating plate is provided with a plurality of second mounting holes; The two wiring conductive blocks are fixed to the first insulating plate along a first direction by at least one of the first mounting holes cooperating with the third mounting hole; the first direction is perpendicular to the direction of the first connecting part pointing to the second connecting part; and / or, the two wiring conductive blocks are fixed to the second insulating plate along a second direction by at least one of the second mounting holes cooperating with the third mounting hole; the second direction is the direction of the first connecting part pointing to the second connecting part.

19. The method for manufacturing a power cycle test fixture structure according to claim 18, characterized in that: The power cycle test fixture structure is used to perform a power cycle test on the three-phase full-bridge power module, the three-phase full-bridge power module includes a U phase, a V phase and a W phase, and the U phase, V phase and W phase connection terminals of the three-phase full-bridge power module each include a first terminal, a second terminal and a third terminal; the first terminal and the second terminal face the first connecting portion, and the third terminal faces the second connecting portion; In the first direction, the first mounting holes corresponding to the first terminals and the second terminals of any one of the U phase, the V phase and the W phase of the three-phase full-bridge power module and the adjacent phases of the three-phase full-bridge power module are shared; In the second direction, the plurality of second mounting holes include at least two groups of mounting hole combinations arranged at intervals; the third terminal of any one of the U phase, V phase and W phase of the three-phase full-bridge power module and at least two groups of the mounting hole combinations are arranged correspondingly; in the second direction, the second mounting holes of any two adjacent groups of the mounting hole combinations are shared; The first terminal and the third terminal or the second terminal and the third terminal of any one phase of the U phase, V phase and W phase of the three-phase full-bridge power module are electrically connected through the first connecting structure and the power terminal connecting hole of the wiring conductive block; the wiring conductive block electrically connected to the first terminal or the second terminal is fixed to at least two of the first mounting holes of the first insulating plate through the second connecting structure and at least two of the third mounting holes, and the third mounting holes and the first mounting holes are arranged in a one-to-one correspondence; the wiring conductive block electrically connected to the third terminal is fixed to at least two of the second mounting holes of the second insulating plate through the second connecting structure and at least two of the third mounting holes, and the third mounting holes and the second mounting holes are arranged in a one-to-one correspondence.

20. The method for manufacturing a power cycle test fixture structure according to claim 18, characterized in that: Supplied radiator includes: Providing a first substrate, the first substrate comprising a first portion, a second portion and a third portion, wherein the second portion is between the first portion and the third portion; A second substrate is formed on one side of the second part, and the second part is used to support the second substrate, wherein the second part and the second substrate constitute the device placement part, the first part constitutes the first connecting part, and the third part constitutes the second connecting part.

21. A power module testing method, characterized in that: include: According to the test capability and test requirements of the power cycle test equipment, the number N of three-phase full-bridge power modules and the number N of power cycle test fixture structures to be tested are selected, wherein the value of N includes an integer greater than or equal to 1; the power cycle test fixture structure is the power cycle test fixture structure as described in any one of claims 1 to 17; Install the three-phase full-bridge power modules on the device placement parts of the power cycle test fixture structure one by one; According to the test requirements, the wiring conductive blocks are fixed on the first insulating plate and / or the second insulating plate; the two wiring conductive blocks are fixed to the first insulating plate along the first direction through at least one of the first mounting holes and the third mounting holes; the first direction is perpendicular to the direction of the first connecting part pointing to the second connecting part; and / or the two wiring conductive blocks are fixed to the second insulating plate along the second direction through at least one of the second mounting holes and the third mounting holes; the second direction is the direction of the first connecting part pointing to the second connecting part; coolant is introduced into the coolant channel of the radiator; The N three-phase full-bridge power modules are tested.

22. The power module testing method according to claim 21, characterized in that: One or more power cycle test fixture structures are selected, and a corresponding number of three-phase full-bridge power modules are placed in the device placement part of the power cycle test fixture structure to perform a power cycle test, and different power cycle test fixture structures are connected in series or in parallel.

23. The power module testing method according to claim 21, characterized in that: The power cycle test fixture structure is used to perform a power cycle test on the three-phase full-bridge power module, the three-phase full-bridge power module includes a U phase, a V phase and a W phase, and the U phase, V phase and W phase connection terminals of the three-phase full-bridge power module each include a first terminal, a second terminal and a third terminal; the first terminal and the second terminal face the first connecting portion, and the third terminal faces the second connecting portion; In the first direction, the first mounting holes corresponding to the first terminals and the second terminals of any one of the U phase, the V phase and the W phase of the three-phase full-bridge power module and the adjacent phases of the three-phase full-bridge power module are shared; In the second direction, the plurality of second mounting holes include at least two groups of mounting hole combinations arranged at intervals; the third terminal of any one of the U phase, V phase and W phase of the three-phase full-bridge power module and at least two groups of the mounting hole combinations are arranged correspondingly; in the second direction, the second mounting holes of any two adjacent groups of the mounting hole combinations are shared; The first terminal and the third terminal or the second terminal and the third terminal of any one phase of the U phase, V phase and W phase of the three-phase full-bridge power module are electrically connected through the first connecting structure and the power terminal connecting hole of the wiring conductive block; the wiring conductive block electrically connected to the first terminal or the second terminal is fixed to at least two of the first mounting holes of the first insulating plate through the second connecting structure and at least two of the third mounting holes, and the third mounting holes and the first mounting holes are arranged in a one-to-one correspondence; the wiring conductive block electrically connected to the third terminal is fixed to at least two of the second mounting holes of the second insulating plate through the second connecting structure and at least two of the third mounting holes, and the third mounting holes and the second mounting holes are arranged in a one-to-one correspondence.

24. The power module testing method according to claim 21, characterized in that: When the first terminal and the third terminal or the second terminal and the third terminal of the power module are electrically connected to the power terminal connection hole of the wiring conductive block through the first connection structure, the following further comprises: The high-current heating wire terminal connection hole of the wiring conductive block and the high-current heating wire are electrically connected through the third connection structure.

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