A power cycle test apparatus

Abstract

The application provides a power cycle test device, and relates to the technical field of semiconductor module testing.The power cycle test device comprises a base, a clamp assembly arranged on the base, a first conductive sheet and a second conductive sheet, the clamp assembly comprises at least one clamp unit, the clamp unit comprises a clamp, a third conductive sheet and a fourth conductive sheet arranged on the clamp, the clamp is used for fixing a module to be tested, and the third conductive sheet and the fourth conductive sheet are electrically connected with the module to be tested respectively; each clamp unit has a corresponding first conductive sheet and a corresponding second conductive sheet, one of the first conductive sheet and the second conductive sheet is electrically connected with the third conductive sheet, and the other is electrically connected with the fourth conductive sheet; the first conductive sheet is further electrically connected with a positive electrode of an external power supply; and the second conductive sheet is further electrically connected with a negative electrode of the external power supply. The power cycle test device can improve the test efficiency of workers and reduce safety hazards.

Description

Technical Field

[0001] This application relates to the field of semiconductor module testing technology, and more specifically, to a power cycle testing device. Background Technology

[0002] Power semiconductor modules are key components in power electronic systems, primarily used for power conversion and control circuit power. A power semiconductor module comprises several parts, including a heat sink, solder, a ceramic copper-clad substrate, chips, and bonding wires. The materials used in these parts differ, and their coefficients of thermal expansion vary with temperature changes. Frequent fluctuations can cause stress changes at the material interfaces, leading to material performance degradation and thus reducing the lifespan of the power semiconductor module.

[0003] Power cycling testing is a core method for verifying the reliability of power semiconductor modules. Under certain cooling conditions, a corresponding load current is applied to the power semiconductor module under test until it reaches a specified temperature. The virtual junction temperature of the power semiconductor module is obtained through the test current, reflecting the stress of the power semiconductor module under real operating conditions. However, existing power cycling testing equipment has many test leads that are disorganized, which not only affects the testing efficiency of personnel but also poses significant safety hazards. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of the prior art by providing a power cycle testing device that facilitates testing for staff, improves testing efficiency, and reduces safety hazards.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] This application provides a power cycle testing device, including: a base, a clamp assembly disposed on the base, a first conductive plate and a second conductive plate. The clamp assembly includes at least one clamp unit, and the clamp unit includes a clamp, a third conductive plate and a fourth conductive plate disposed on the clamp. The clamp is used to fix the module to be tested, and the third conductive plate and the fourth conductive plate are electrically connected to the module to be tested, respectively. Each clamp unit has a corresponding first conductive plate and a second conductive plate, wherein one of the first conductive plate and the second conductive plate is electrically connected to the third conductive plate and the other is electrically connected to the fourth conductive plate. The first conductive plate is also electrically connected to the positive terminal of an external power supply, and the second conductive plate is also electrically connected to the negative terminal of an external power supply.

[0007] Optionally, it also includes a support platform disposed on the base, with the first conductive sheet and the second conductive sheet located on the support platform, the first conductive sheet and the second conductive sheet being higher than the surface of the clamping unit away from the base.

[0008] Optionally, the support platform includes an elevation section and a support section. One end of the elevation section is connected to the base and the other end is connected to the support section. The first conductive sheet and the second conductive sheet are located on the surface of the support section away from the base.

[0009] Optionally, a first groove is provided on the support platform, the first groove is adapted to a first conductive sheet or a second conductive sheet, and the first conductive sheet and the second conductive sheet are fixed in the first groove.

[0010] Optionally, the number of clamping assemblies is at least two sets, and the at least two sets of clamping assemblies are distributed at intervals along the first direction. If the number of clamping units in the clamping assembly is at least two, the at least two clamping units are distributed at intervals along the second direction, the first direction is perpendicular to the second direction, and both the first direction and the second direction are parallel to the surface of the base.

[0011] Optionally, the fixture also includes multiple support platforms disposed on the base. The fixture has support platforms on both sides in the first direction, wherein one support platform is used to set a first conductive sheet corresponding to the fixture, and the other support platform is used to set a second conductive sheet corresponding to the fixture.

[0012] Optionally, the support platform includes an elevation section and at least one support section, with the support sections stacked on the elevation section. The elevation section is connected to the base, and each support section has a first conductive sheet and / or a second conductive sheet on its surface opposite to the elevation section.

[0013] Optionally, it also includes a heat dissipation assembly mounted on the base. The heat dissipation assembly includes a liquid reservoir and a coolant pipe. The liquid reservoir and the clamp are connected through the coolant pipe, which is located between the support and the base.

[0014] Optionally, a water receiving platform is also provided on the base, with the coolant pipes and clamps located between the water receiving platform and the support.

[0015] Optionally, the first conductive sheet includes a first main circuit and a first branch, a second branch, and a third branch connected to the first main circuit. The first branch is used to be electrically connected to the positive terminal of an external power source, the second branch is used to be electrically connected to the third conductive sheet, and the third branch is used to be electrically connected to the fourth conductive sheet. The second conductive sheet includes a second main circuit and a fourth branch, a fifth branch, and a sixth branch connected to the second main circuit. The fourth branch is used to be electrically connected to the negative terminal of an external power source, the fifth branch is used to be electrically connected to the third conductive sheet, and the sixth branch is used to be electrically connected to the fourth conductive sheet.

[0016] The beneficial effects of this application include:

[0017] This application provides a power cycle testing device, comprising: a base, a clamp assembly disposed on the base, a first conductive plate, and a second conductive plate. The clamp assembly includes at least one clamp unit, and each clamp unit includes a clamp, a third conductive plate, and a fourth conductive plate disposed on the clamp. The clamp is used to fix the module under test, and the third and fourth conductive plates are electrically connected to the module under test, respectively. Each clamp unit has a corresponding first conductive plate and a second conductive plate, wherein one of the first and second conductive plates is electrically connected to the third conductive plate, and the other is electrically connected to the fourth conductive plate. The first conductive plate is also electrically connected to the positive terminal of an external power supply, and the second conductive plate is also electrically connected to the negative terminal of the external power supply. This power cycle testing device uses conductive plates to achieve the electrical connection between the module under test and the external power supply. In practical applications, by placing the first and second conductive plates near their corresponding clamp units, and placing the third and fourth conductive plates of the clamp units near the clamps, the circuit can be connected nearby, avoiding the haphazard arrangement of various test leads on the base. This improves the testing efficiency of the personnel and reduces safety hazards. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the structural schematic diagrams of the power cycle testing device provided in the embodiments of this application;

[0020] Figure 2 This is a second schematic diagram of the power cycle testing device provided in the embodiments of this application;

[0021] Figure 3 A schematic diagram of the support platform, the first conductive sheet, and the second conductive sheet in the power cycling test device provided in the embodiments of this application;

[0022] Figure 4 This is the third schematic diagram of the power cycle testing device provided in the embodiments of this application;

[0023] Figure 5 This is a schematic diagram of the fixture unit in the power cycle testing device provided in the embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the fixture assembly and heat dissipation assembly in the power cycle testing device provided in the embodiments of this application.

[0025] Icons: 10-Power Cyclic Testing Device; 11-Base; 111-First Substrate; 112-Second Substrate; 113-Column; 12-Clamp Assembly; 12a-Clamp Unit; 121-Clamp; 1211-Third Groove; 122-Third Conductive Sheet; 123-Fourth Conductive Sheet; 124-Base Plate; 125-Bump; 1251-Second Groove; 126-Base; 13-First Conductive Sheet; 131-First Main Circuit; 132-First Branch Circuit; 133-Second Branch Circuit; 134-Third Branch Circuit; 14-Second Conductive Sheet; 141-Second main path; 142-Fourth branch path; 143-Fifth branch path; 144-Sixth branch path; 15-Support platform; 15a-Elevation section; 15b-Support section; 151-First groove; 16-Heat dissipation assembly; 161-Coolant pipe; 1611-Inlet pipe; 1612-Outlet pipe; 162-Diverter; 163-Merge; 164-Inlet control valve; 165-Outlet control valve; 166-Flow meter; 17-Water receiving platform; 171-Fourth groove; 20-Module to be tested; X-First direction; Y-Second direction. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Please refer to Figure 1 This application provides a power cycling test device 10 for testing power semiconductor modules to verify their reliability.

[0033] Please refer to the reference. Figure 2 Specifically, the power cycle testing device 10 includes: a base 11, a clamp assembly 12 disposed on the base 11, a first conductive sheet 13, and a second conductive sheet 14. The base 11 serves as a support for mounting the clamp assembly 12, the first conductive sheet 13, and the second conductive sheet 14. The clamp assembly 12, the first conductive sheet 13, and the second conductive sheet 14 can be directly disposed on the surface of the base 11, or indirectly disposed on the surface of the base 11 through other support structures. For example, the first conductive sheet 13 is disposed on a support platform 15, and the support platform 15 is disposed on the base 11.

[0034] The number of fixture assemblies 12 can be one, two, or more, and each fixture assembly 12 includes at least one fixture unit 12a. When the number of fixture assemblies 12 is two or more, the number of fixture units 12a in any two fixture assemblies 12 can be equal or unequal.

[0035] Each fixture unit 12a includes a fixture 121, a third conductive plate 122, and a fourth conductive plate 123 disposed on the fixture 121. The fixture 121 is used to fix the module under test 20, and the third conductive plate 122 and the fourth conductive plate 123 are electrically connected to the module under test 20, respectively. For example, the third conductive plate 122 and the fourth conductive plate 123 are connected to the pins of the module under test 20, respectively.

[0036] The module under test 20 can be optionally fixed to the upper surface of the fixture 121 to facilitate the assembly and disassembly of the module under test 20 and the connection of the conductive sheet. The module under test 20 can be fixed to the surface of the fixture 121 by bolts. For example, the module under test 20 has a through hole, and the fixture 121 has a threaded hole corresponding to the through hole. The bolt passes through the through hole and is threaded into the threaded hole, thereby fixing the module under test 20 to the fixture 121. There can be multiple bolts used to fix the module under test 20, and they are preferably symmetrically arranged or rectangularly distributed.

[0037] Each fixture unit 12a has a corresponding first conductive plate 13 and a second conductive plate 14. One of the first conductive plate 13 and the second conductive plate 14 is electrically connected to the third conductive plate 122, and the other is electrically connected to the fourth conductive plate 123. The first conductive plate 13 is also electrically connected to the positive terminal of an external power supply, and the second conductive plate 14 is also electrically connected to the negative terminal of an external power supply. The positive terminal of the external power supply, the first conductive plate 13, the third conductive plate 122, the module under test 20, the fourth conductive plate 123, the second conductive plate 14, and the negative terminal of the external power supply form a closed loop, in which the load current can flow to achieve the testing of the module under test 20.

[0038] It should be noted that each fixture unit 12a requires at least one first conductive sheet 13 and at least one second conductive sheet 14. The two fixture units 12a do not share the first conductive sheet 13 and the second conductive sheet 14. Therefore, the number of first conductive sheets 13 is greater than or equal to the total number of fixture units 12a, and the number of second conductive sheets 14 is greater than or equal to the total number of fixture units 12a.

[0039] When there are two or more fixture units 12a, the modules 20 to be tested in the two or more fixture units 12a are connected to an external power supply through their corresponding first conductive sheet 13 and second conductive sheet 14, so that the two or more modules 20 to be tested can be tested simultaneously, thereby improving the testing efficiency.

[0040] In a fixture unit 12a, the number of third conductive sheets 122 and fourth conductive sheets 123 can be two or more. In this case, the first conductive sheet 13 and the second conductive sheet 14 corresponding to the fixture unit 12a are each connected to one of the third conductive sheets 122 or one of the fourth conductive sheets 123. To further improve the convenience of connection, the third conductive sheets 122 are all located on one side of the module under test 20, and the fourth conductive sheets 123 are all located on the opposite side of the module under test 20. Furthermore, when the number of third conductive sheets 122 is two or more, the two or more third conductive sheets 122 are spaced apart along a preset direction; when the number of fourth conductive sheets 123 is two or more, the two or more fourth conductive sheets 123 are spaced apart along a preset direction; the preset direction is the length direction of the module under test 20 after it is fixed to the fixture 121.

[0041] The power cycle testing device 10 described above uses conductive sheets to achieve electrical connection between the module under test 20 and the external power supply. In practical applications, the first conductive sheet 13 and the second conductive sheet 14 are placed near their corresponding fixture unit 12a, and the third conductive sheet 122 and the fourth conductive sheet 123 of the fixture unit 12a are placed near the fixture 121. This allows for close connection of the circuit, avoiding the messy arrangement of various test leads on the base 11. This not only improves the testing efficiency of the staff but also reduces safety hazards.

[0042] Optionally, please refer to the following: Figure 3 The first conductive sheet 13 includes a first main path 131 and a first branch path 132, a second branch path 133, and a third branch path 134, all connected to the first main path 131. The first main path 131, first branch path 132, second branch path 133, and third branch path 134 are all conductive. The first branch path 132 is used for electrical connection to the positive terminal of an external power source, the second branch path 133 is used for electrical connection to the third conductive sheet 122, and the third branch path 134 is used for electrical connection to the fourth conductive sheet 123.

[0043] The second conductive sheet 14 includes a second main circuit 141, a fourth branch circuit 142, a fifth branch circuit 143 and a sixth branch circuit 144 respectively connected to the second main circuit 141. The fourth branch circuit 142 is used to be electrically connected to the negative terminal of an external power supply, the fifth branch circuit 143 is used to be electrically connected to the third conductive sheet 122, and the sixth branch circuit 144 is used to be electrically connected to the fourth conductive sheet 123.

[0044] It should be noted that if the second branch 133 of the first conductive sheet 13 is electrically connected to the third conductive sheet 122 of the corresponding clamping unit 12a, then the third branch 134 of the first conductive sheet 13 is not electrically connected to the fourth conductive sheet 123 of the corresponding clamping unit 12a. Instead, the sixth branch 144 of the second conductive sheet 14 is connected to the fourth conductive sheet 123 of the corresponding clamping unit 12a, and the fifth branch 143 of the second conductive sheet 14 is also not electrically connected to the third conductive sheet 122 of the corresponding clamping unit 12a. That is, only one of the second branch 133 and the third branch 134 is connected to the corresponding clamping unit 12a, and only one of the fifth branch 143 and the sixth branch 144 is connected to the corresponding clamping unit 12a. If a branch of the first conductive sheet 13 is connected to the third conductive sheet 122, then a branch of the second conductive sheet 14 needs to be connected to the fourth conductive sheet 123.

[0045] Alternatively, please refer to Figure 1 , Figure 2 and Figure 4 The power cycle testing device 10 also includes a support platform 15 disposed on the base 11, with the first conductive sheet 13 and the second conductive sheet 14 located on the support platform 15, and the first conductive sheet 13 and the second conductive sheet 14 being higher than the surface of the clamp unit 12a away from the base 11.

[0046] The first conductive plate 13 and the second conductive plate 14 are raised by the support platform 15 so that both conductive plates are higher than the surface of the fixture unit 12a away from the base 11 (the upper surface in the figure). If the heights of different positions on the upper surface of the fixture unit 12a are inconsistent, both conductive plates will be higher than the highest point of the upper surface of the fixture unit 12a. If the conductive plates are tilted, the lowest point on the conductive plates will be higher than the highest point of the upper surface of the fixture unit 12a. The reason for this arrangement is that during power cycling tests, coolant is usually introduced into the fixture unit 12a to cool the module 20 under test. Setting the two conductive plates higher than the upper surface of the fixture unit 12a can prevent coolant leakage from contacting the conductive plates, thereby reducing the risk of leakage.

[0047] The first conductive sheet 13 and the second conductive sheet 14 are preferably disposed on the surface of the support platform 15 opposite to the base 11 (the upper surface in the figure), and the first conductive sheet 13 and the second conductive sheet 14 are respectively attached to the support platform 15. This arrangement facilitates the installation of the first conductive sheet 13 and the second conductive sheet 14 and ensures the reliability of their installation.

[0048] It should be noted that, in this embodiment, the number of support platforms 15 is not limited. A large support platform 15 can be provided, with all the first conductive sheets 13 and second conductive sheets 14 disposed on the same support platform 15. Alternatively, multiple small support platforms 15 can be provided, with multiple first conductive sheets 13 and multiple second conductive sheets 14 dispersedly disposed on different support platforms 15. Furthermore, the first conductive sheets 13 and second conductive sheets 14 disposed on the same support platform 15 can correspond to the same clamping unit 12a or to different clamping units 12a. Figure 2 Taking the disclosed embodiments as an example, in Figure 2 From this perspective, there are three support platforms 15, spaced apart from top to bottom. The upper surface of the middle support platform 15 has a first conductive plate 13 and a second conductive plate 14. The first conductive plate 13 connects to the clamping unit 12a below the support platform 15, and the second conductive plate 14 connects to the clamping unit 12a above the support platform 15. The first conductive plate 13 and the second conductive plate 14 are not connected to the same clamping unit 12a. Two conductive plates close to each other can be arranged back-to-back to facilitate connection to the clamping units 12a on either side of the support platform 15.

[0049] Alternatively, please refer to Figure 1 and Figure 3 The support platform 15 is provided with a first groove 151, which is adapted to the first conductive sheet 13 or the second conductive sheet 14. The first conductive sheet 13 and the second conductive sheet 14 are fixed in the first groove 151.

[0050] It is understood that the first conductive sheet 13 and the second conductive sheet 14 are respectively fixed in different first grooves 151 to achieve isolation. The inner wall of the first groove 151 used to fix the first conductive sheet 13 is adapted to the outer wall of the first conductive sheet 13, thereby wrapping the first conductive sheet 13, which can quickly position and limit the first conductive sheet 13, and also protect the first conductive sheet 13. If the depth of the first groove 151 is equal to the thickness of the first conductive sheet 13, the setting of the first groove 151 can also keep the surface of the support platform 15 flat. Similarly, the inner wall of the first groove 151 used to fix the second conductive sheet 14 is adapted to the outer wall of the second conductive sheet 14, thereby wrapping the second conductive sheet 14, which can quickly position and limit the second conductive sheet 14, and also protect the second conductive sheet 14. If the depth of the first groove 151 is equal to the thickness of the second conductive sheet 14, the setting of the first groove 151 can also keep the surface of the support platform 15 flat.

[0051] Optionally, please refer to the following: Figure 2The support platform 15 includes a heightening part 15a and a support part 15b. One end of the heightening part 15a is connected to the base 11 and the other end is connected to the support part 15b. The first conductive sheet 13 and the second conductive sheet 14 are located on the surface of the support part 15b away from the base 11.

[0052] The heightening part 15a can be provided so that the support part 15b and the base 11 are spaced at a certain distance. After the first conductive sheet 13 and the second conductive sheet 14 are fixed to the support part 15b, the first conductive sheet 13 and the second conductive sheet 14 are higher than the surface of the clamp 121 away from the base 11.

[0053] The number of raising portions 15a is preferably two, and the two raising portions 15a are distributed at intervals along the length direction of the support portion 15b, and support the support portion 15b near the edge of the support portion 15b. This can improve the stability of the support platform 15 structure, and at the same time, the area between the two raising portions 15a can be used to arrange other structures of the power cycle testing device 10.

[0054] In a support platform 15, the number of support portions 15b can be two or more. In this case, the two or more support portions 15b are preferably stacked on the raised portion 15a. Each support portion 15b can be provided with a first conductive sheet 13 and a second conductive sheet 14 on the surface away from the base 11. In this way, when there are many conductive sheets on the same support platform 15, the individual conductive sheets can be well isolated without occupying too much horizontal space.

[0055] To facilitate the installation of the third conductive sheet 122 and the fourth conductive sheet 123, optionally, please refer to... Figure 5 The clamping unit 12a further includes: a base plate 124 and two protrusions 125 disposed on the base plate 124, a clamp 121 disposed between the two protrusions 125, and a third conductive sheet 122 and a fourth conductive sheet 123 disposed on the surface of the protrusions 125 away from the base plate 124.

[0056] Furthermore, a third conductive sheet 122 is disposed on the surface of a protrusion 125, and a fourth conductive sheet 123 is disposed on the surface of another protrusion 125. A second groove 1251 is provided on the protrusion 125, and the second groove 1251 is adapted to the third conductive sheet 122 or the fourth conductive sheet 123, and the third conductive sheet 122 and the fourth conductive sheet 123 are fixed in the second groove 1251.

[0057] Optionally, please refer to the following: Figure 1 The clamping unit 12a also includes a base 126, which is disposed on the base 11, and a base plate 124 is disposed on the base 126. The clamping unit 12a is connected to the base 11 through the base 126.

[0058] To enable simultaneous testing of multiple modules and improve testing efficiency, optionally, please refer to... Figure 1 and Figure 2 The number of clamping assemblies 12 is at least two sets, and the at least two sets of clamping assemblies 12 are distributed at intervals along the first direction X. If the number of clamping units 12a in the clamping assembly 12 is at least two, the at least two clamping units 12a are distributed at intervals along the second direction Y. The first direction X is perpendicular to the second direction Y, and both the first direction X and the second direction Y are parallel to the surface of the base 11.

[0059] It should be noted that if the number of fixture assemblies 12 is two or more sets, the number of fixture units 12a in different sets of fixture assemblies 12 may be equal or unequal. Figure 2 For example, there are two sets of fixture assemblies 12. One set of fixture assemblies 12 contains one fixture unit 12a, and the other set of fixture assemblies 12 contains two fixture units 12a.

[0060] Optionally, at least two clamping units 12a are staggered along the first direction X.

[0061] Still with Figure 2 For example, there are two sets of clamping assemblies 12, with the clamping units 12a in one set of clamping assemblies 12 being staggered with those in the other set of clamping assemblies 12. Please refer to the reference. Figure 6 The staggered arrangement of the fixture units 12a facilitates the placement of coolant pipes 161 on both sides of the fixture unit 12a along the first direction X, preventing one fixture unit 12a from affecting the arrangement of the coolant pipes 161 of the other fixture unit 12a. Coolant can be introduced into the fixture unit 12a through the coolant pipes 161 to cool the module to be tested. Simultaneously, the staggered arrangement of the fixture units 12a also facilitates operation by the staff.

[0062] Furthermore, the power cycle testing device 10 also includes a plurality of support platforms 15 disposed on the base 11. The clamp 121 is provided with support platforms 15 on both sides in the first direction X, wherein one support platform 15 is used to set the first conductive sheet 13 corresponding to the clamp 121, and the other support platform 15 is used to set the second conductive sheet 14 corresponding to the clamp 121.

[0063] Each clamp 121 has a support platform 15 on both sides in the first direction X, but two or more clamps 121 in the same clamp assembly 12 can share the support platform 15 to reduce the number of support platforms 15 used. Figure 2 The situation shown is that two clamps 121 in the same clamp assembly 12 share a support platform 15. In this way, a support platform 15 can be set on each side of a clamp assembly 12.

[0064] However, having two or more fixtures 121 share the support platform 15 would increase the number of first conductive plates 13 and second conductive plates 14 on one support platform 15. To avoid increasing the horizontal dimension of the support platform 15 and to achieve isolation between the individual conductive plates, alternatively, please refer to the reference... Figure 3 The support platform 15 includes an elevation portion 15a and at least one support portion 15b. The support portions 15b are stacked on the elevation portion 15a. The elevation portion 15a is connected to the base 11. Each support portion 15b has a first conductive sheet 13 and / or a second conductive sheet 14 on its surface opposite to the elevation portion 15a.

[0065] In this way, the first conductive sheet 13 and the second conductive sheet 14 can be distributed on different support portions 15b, thereby achieving isolation between the conductive sheets. Moreover, the stacked arrangement of the support portions 15b only occupies space in the height direction and does not cause the horizontal dimension of the support platform 15 to increase.

[0066] The module under test 20 requires heat dissipation during testing; therefore, optionally, please refer to... Figure 1 and Figure 6 The power cycle testing device 10 also includes a heat dissipation assembly 16 mounted on the base 11. The heat dissipation assembly 16 includes a liquid storage tank and a coolant pipe 161, which is connected to the fixture 121 via the coolant pipe 161. The liquid storage tank stores coolant, which enters the fixture 121 through the coolant pipe 161 to cool the module 20 under test. The coolant pipe 161 is located between the support portion 15b and the base 11, so that the coolant exposed on the coolant pipe 161 will not come into contact with the first and second heat-conducting plates, thereby reducing the risk of leakage.

[0067] Furthermore, please refer to the following: Figure 5 The fixture 121 is provided with a third groove 1211, which is used to accommodate the module 20 to be tested. The third groove 1211 is connected to the coolant pipe 161, and the coolant in the coolant pipe 161 enters the third groove 1211 to cool the module 20 to be tested.

[0068] Optionally, the heat dissipation assembly 16 further includes a distributor 162 and a manifold 163. The coolant pipe 161 includes an inlet pipe 1611 and an outlet pipe 1612. One end of the inlet pipe 1611 is connected to the distributor 162 and the other end is connected to the clamp 121. One end of the outlet pipe 1612 is connected to the clamp 121 and the other end is connected to the manifold 163. The distributor 162 is also connected to the outlet of the coolant tank, and the manifold 163 is also connected to the inlet of the coolant tank. In this way, a closed coolant flow channel can be formed.

[0069] When there are two or more clamping units 12a, there are also two or more corresponding inlet pipes 1611 and outlet pipes 1612. Two or more inlet pipes 1611 are simultaneously connected to the distributor 162, and two or more outlet pipes 1612 are simultaneously connected to the manifold 163.

[0070] Optionally, an inlet control valve 164 is provided on the inlet pipe 1611 to control the opening and closing of the inlet pipe 1611 and the opening area, and / or an outlet control valve 165 is provided on the outlet pipe 1612 to control the opening and closing of the outlet pipe 1612 and the opening area. In practical applications, the flow rate of the coolant in the coolant pipe 161 can be controlled according to the temperature of the module under test 20. A flow meter 166 can also be installed on the inlet pipe 1611 to display the flow rate of the coolant in the inlet pipe 1611. The operator can adjust the inlet control valve 164 according to the flow rate value displayed by the flow meter 166 to control the flow rate of the coolant in the inlet pipe 1611. The flow meter 166 is preferably located next to the inlet control valve 164 for easy observation by the operator.

[0071] Optionally, the base 11 includes a first substrate 111 and a second substrate 112 arranged at intervals along the vertical direction. The first substrate 111 and the second substrate 112 are connected by a plurality of columns 113. The first substrate 111 is located above the second substrate 112. The clamp assembly 12, the first conductive sheet 13 and the second conductive sheet 14 are disposed on the first substrate 111. The current splitter 162 and the current combiner 163 are disposed on the second substrate 112.

[0072] The clamp assembly 12, the first conductive sheet 13, and the second conductive sheet 14 are mounted on the relatively high first substrate 111, which facilitates operation by the staff. At the same time, the shunt 162 and the combiner 163 are arranged in the space below the first substrate 111, which saves horizontal space and makes the layout of the power circulation device more reasonable.

[0073] Optionally, the liquid inlet pipe 1611 extends vertically, passes through the first substrate 111, and then extends horizontally to connect with the clamp 121; the liquid outlet pipe 1612 extends vertically, passes through the first substrate 111, and then extends horizontally to connect with the clamp 121.

[0074] Optionally, a water receiving platform 17 is also provided on the base 11, and the coolant pipe 161 and the clamp 121 are located between the water receiving platform 17 and the support part 15b.

[0075] If there is leakage in the area of ​​the heat dissipation assembly 16 above the base 11, the coolant can be collected by the water receiving platform 17 to prevent the coolant from flowing freely on the base 11 and posing a risk of electric leakage. Generally speaking, the inlet control valve 164 on the inlet pipe 1611 and the outlet control valve 165 on the outlet pipe 1612 are more prone to leakage. If the inlet control valve 164 or the outlet control valve 165 is located above the base 11, the water receiving platform 17 needs to extend below the inlet control valve 164 or the outlet control valve 165.

[0076] Furthermore, the water receiving platform 17 is provided with a fourth groove 171 for storing exposed coolant. In other embodiments, a slope can also be provided on the upper surface of the water receiving platform 17 to guide the coolant away from the base 11.

[0077] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power cycle testing device, characterized in that, include: The base, a clamp assembly disposed on the base, a first conductive sheet and a second conductive sheet, the clamp assembly including at least one clamp unit, the clamp unit including a clamp, a third conductive sheet and a fourth conductive sheet disposed on the clamp, the clamp being used to fix the module to be tested, the third conductive sheet and the fourth conductive sheet being electrically connected to the module to be tested respectively; Each of the clamping units has a corresponding first conductive sheet and a second conductive sheet, wherein one of the first conductive sheet and the second conductive sheet is electrically connected to the third conductive sheet and the other is electrically connected to the fourth conductive sheet. The first conductive sheet is also electrically connected to the positive terminal of an external power supply, and the second conductive sheet is also electrically connected to the negative terminal of the external power supply.

2. The power cycle testing device as described in claim 1, characterized in that, It also includes a support platform disposed on the base, with the first conductive sheet and the second conductive sheet located on the support platform, and the first conductive sheet and the second conductive sheet being higher than the surface of the clamping unit away from the base.

3. The power cycle testing device as described in claim 2, characterized in that, The support platform includes a heightening section and a support section. One end of the heightening section is connected to the base and the other end is connected to the support section. The first conductive sheet and the second conductive sheet are located on the surface of the support section opposite to the base.

4. The power cycle testing device as described in claim 2, characterized in that, The support platform is provided with a first groove, which is adapted to the first conductive sheet or the second conductive sheet, and the first conductive sheet and the second conductive sheet are fixed in the first groove.

5. The power cycle testing device as described in claim 1, characterized in that, The number of clamping assemblies is at least two sets, and the at least two sets of clamping assemblies are distributed at intervals along a first direction. If the number of clamping units in the clamping assembly is at least two, the at least two clamping units are distributed at intervals along a second direction. The first direction is perpendicular to the second direction, and both the first direction and the second direction are parallel to the surface of the base.

6. The power cycle testing device as described in claim 5, characterized in that, It also includes a plurality of support platforms disposed on the base. The clamp is provided with the support platforms on both sides in the first direction, wherein the support platform on one side is used to set the first conductive sheet corresponding to the clamp, and the support platform on the other side is used to set the second conductive sheet corresponding to the clamp.

7. The power cycle testing device as described in claim 6, characterized in that, The support platform includes an elevation section and at least one support section. The support sections are stacked on the elevation section and connected to the base. Each support section has a first conductive sheet and / or a second conductive sheet on its surface opposite to the elevation section.

8. The power cycle testing device as described in claim 3, characterized in that, It also includes a heat dissipation assembly disposed on the base, the heat dissipation assembly including a liquid storage tank and a coolant pipe, the liquid storage tank and the clamp being connected through the coolant pipe, the coolant pipe being located between the support and the base.

9. The power cycle testing device as described in claim 8, characterized in that, The base is also provided with a water receiving platform, and the coolant pipe and the clamp are both located between the water receiving platform and the support.

10. The power cycle testing apparatus as described in claim 1, characterized in that, The first conductive sheet includes a first main circuit, a first branch circuit, a second branch circuit, and a third branch circuit, which are respectively connected to the first main circuit. The first branch circuit is used to be electrically connected to the positive terminal of an external power supply, the second branch circuit is used to be electrically connected to the third conductive sheet, and the third branch circuit is used to be electrically connected to the fourth conductive sheet. The second conductive sheet includes a second main circuit, a fourth branch circuit, a fifth branch circuit, and a sixth branch circuit, which are respectively connected to the second main circuit. The fourth branch circuit is used to be electrically connected to the negative terminal of an external power supply, the fifth branch circuit is used to be electrically connected to the third conductive sheet, and the sixth branch circuit is used to be electrically connected to the fourth conductive sheet.

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