Movable temperature testing device for testing power module

Abstract

The invention relates to a movable temperature testing device for testing a power module, the movable temperature testing device comprises a movable testing clamp, a water tank and a water pump, the movable testing clamp comprises a box with an accommodating space and a constant temperature plate, and the power module to be tested is placed in the accommodating space; the constant-temperature plate and the box form a clamping structure to clamp and fix the power module, the constant-temperature plate and the power module are attached to each other, and the constant-temperature plate is provided with a water inlet and a water outlet. The constant temperature plate is communicated with the water tank and the water pump through the water inlet and the water outlet to form a circulating water path, and when the water pump works, water in the water tank flows in the circulating water path. The device provided by the invention can be used in different scenes and on different tooling plates, and simulates different temperatures for testing, so that researchers can conveniently evaluate performance parameters of the power module at different temperatures.

Description

Technical Field

[0001] The invention relates to the technical field of circuit testing, and in particular to a movable temperature testing device for testing a power module. Background Art

[0002] The parameter characteristics of power modules change significantly with temperature, and the parameters of devices vary greatly under different temperature conditions. Under normal circumstances, the test method that requires increasing the module temperature is to fix the power module on the test machine and heat it. In other words, the existing heating test can only be used on the equipment of the test machine. If it is changed to a scenario that requires testing at different temperatures, then the solution based on the test machine will not meet the needs of temperature testing due to the difficulty of moving the machine and adjusting the environment. Summary of the invention

[0003] The present invention aims to solve the technical problem in the prior art that power module testing based on a testing machine is difficult to meet the temperature change testing requirements due to the fixed position.

[0004] In order to solve the above technical problems, the present invention provides a movable temperature testing device for testing a power module, the movable temperature testing device comprises a movable testing clamp, a water tank and a water pump, the mobile testing clamp comprises a box with a receiving space and a constant temperature plate, the power module to be tested is placed in the receiving space, the constant temperature plate and the box form a clamping structure to clamp and fix the power module, the constant temperature plate and the power module are fitted together, the constant temperature plate is provided with a water inlet and a water outlet, the constant temperature plate is connected to the water tank and the water pump through the water inlet and the water outlet through a water pipe to form a circulating water circuit, and when the water pump is working, the water in the water tank flows in the circulating water circuit.

[0005] Furthermore, the mobile test clamp also includes a spring, a first end of the spring is fixed to the constant temperature plate, a second end of the spring is fixed to the box, and the power module is clamped and fixed in the deformation direction of the spring.

[0006] Furthermore, the constant temperature plate is a layered structure including an electric heating network layer and a water circulation pipeline layer, the water circulation pipeline layer is provided with the water inlet and the water outlet, and the water circulation pipeline layer is in contact with the power module.

[0007] Furthermore, the constant temperature plate is also used to monitor the temperature of water flowing through the water circulation pipeline layer, and dynamically adjust the overall temperature of the constant temperature plate through the electric heating network layer according to the temperature of the water.

[0008] Furthermore, the water tank also includes a circuit control board and a heating device, the heating device is in direct contact with the water in the water tank, and the circuit control board controls the heating device according to a preset program to adjust the temperature of the water in the water tank.

[0009] Furthermore, the water tank also includes a fan, and the circuit control board controls the fan according to the preset program to adjust the temperature of the water in the water tank.

[0010] The beneficial effect achieved by the present invention is that a movable temperature testing device for testing power modules with high efficiency and flexibility is proposed. The device is based on a clamping structure and can heat any power module of a suitable size to meet the heating requirements of different scenarios. Moreover, the constant temperature system based on electric heating and water heating enables the device to be used in different scenarios and on different tooling boards, and to simulate different temperatures for testing, making it convenient for researchers to evaluate the performance parameters of power modules at different temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of a movable temperature testing device for testing a power module provided by an embodiment of the present invention;

[0012] Figure 2 is a schematic diagram of an electric heating network layer of a movable temperature testing device for testing a power module provided in an embodiment of the present invention;

[0013] Figure 3 is a schematic diagram of a water circulation pipeline layer of a movable temperature testing device for testing a power module provided in an embodiment of the present invention;

[0014] Figure 4 It is a schematic cross-sectional view of a constant temperature plate of a movable temperature testing device for testing a power module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] Please also refer to Figures 1 to 4The embodiment of the present invention provides a movable temperature testing device 100 for testing a power module, the movable temperature testing device comprising a movable testing clamp 1, a water tank 2 and a water pump 3, the mobile testing clamp 1 comprising a box 11 with a receiving space and a constant temperature plate 12, the power module 200 to be tested is placed in the receiving space, the constant temperature plate 12 and the box 11 form a clamping structure to clamp and fix the power module 200, the constant temperature plate 12 and the power module 200 are in contact with each other, the constant temperature plate 12 is provided with a water inlet 1221 and a water outlet 1222, the constant temperature plate 12 is connected to the water tank 2 and the water pump 3 through the water inlet 1221 and the water outlet 1222 through a water pipe 4 to form a circulating water circuit, and when the water pump 3 is working, the water in the water tank 2 flows in the circulating water circuit.

[0017] The mobile test fixture 1 further includes a spring 13, a first end of the spring 13 is fixed to the constant temperature plate 12, a second end of the spring 13 is fixed to the box 11, and the power module 200 is clamped and fixed in the deformation direction of the spring 13. Preferably, the spring 13 includes two groups, which are respectively arranged on different sides of the constant temperature plate 12 to improve the clamping effect of the clamping structure formed by the constant temperature plate 12 and the box 11.

[0018] The constant temperature plate 12 is a layered structure including an electric heating network layer 121 and a water circulation pipeline layer 122 . The water circulation pipeline layer 122 is provided with the water inlet 1221 and the water outlet 1222 , and the water circulation pipeline layer 122 is in contact with the power module 200 .

[0019] The constant temperature plate 12 is also used to monitor the temperature of water flowing through the water circulation pipeline layer 122 , and dynamically adjust the overall temperature of the constant temperature plate 12 through the electric heating network layer 121 according to the temperature of the water.

[0020] The water tank 2 further includes a circuit control board 21 and a heating device 22. The heating device 22 is in direct contact with the water in the water tank 2. The circuit control board 21 controls the heating device 22 according to a preset program to adjust the temperature of the water in the water tank 2.

[0021] The water tank 2 further includes a fan 23. The circuit control board 21 controls the fan 23 according to the preset program to adjust the temperature of the water in the water tank 2. The fan 23 includes two groups to improve the heat dissipation effect of the water temperature.

[0022] Preferably, the electric heating network layer 121 is connected to the circuit control board 21 through a pre-set heating power supply port 1211, and the circuit control board 21 controls the temperature of the electric heating network layer 121. Specifically, the electric heating network layer 121 and the heating device 22 are both implemented based on the structure of the heating wire, so the circuit control board 21 can control the temperature of the electric heating network layer 121 and the heating device 22 by controlling the power supply (the thermal effect of the current, Q=I 2 RT). The preset program may be a pre-designed temperature control program for performing a certain constant temperature test on a specific power module.

[0023] For example, if it is necessary to test the performance of the power module 200 at 120 degrees Celsius, when the temperature of the power module 200 is higher than 120 degrees, the constant temperature plate 12 detects that the module temperature is too high and starts the water pump 3, and starts water circulation to cool the constant temperature plate 12. Through the preset program, the set temperature is controlled within an error range of 1 degree Celsius. For example, when the temperature is lower than 119 degrees, the water pump will stop working, and the temperature of the heating wire and the water temperature will be neutralized at about 120 degrees. After that, by controlling the water temperature and heating the heating wire, the water circulation and the heating wire can finally achieve a constant temperature effect. In order to simplify the control program, the current can be controlled by an adjustable resistor. Three adjustment gears are set by pre-setting three resistance values. When the adjustable resistor is at the maximum value, the current flowing through the heating wire is small, the heating is slow, and the time is long. When the resistance value is minimum, the current flowing through the heating wire is maximum, and the heating is fastest. In this way, the temperature of the constant temperature board can be controlled by water circulation. Since the temperature of the power module is monitored in real time, when the water temperature cannot be maintained at a constant temperature within 3 minutes, the circuit control board 21 will detect the comparison temperature, judge by the temperature difference, and automatically adjust the gear. The resistor is switched by the control circuit to convert different gears to achieve the purpose of constant temperature.

[0024] During the implementation, the constant temperature plate 21 has a thickness of 1-2 mm and a width smaller than the width of the power module by 1-2 cm, which is convenient for plugging the power module pins on the tooling board or other test equipment. The volume of the water tank 2 can be set to 10 cm*10 cm*10 cm to meet the need for portability.

[0025] The beneficial effect achieved by the present invention is that a movable temperature testing device for testing power modules with high efficiency and flexibility is proposed. The device is based on a clamping structure and can heat any power module of a suitable size to meet the heating requirements of different scenarios. Moreover, the constant temperature system based on electric heating and water heating enables the device to be used in different scenarios and on different tooling boards, and to simulate different temperatures for testing, making it convenient for researchers to evaluate the performance parameters of power modules at different temperatures.

[0026] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM).

[0027] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0028] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0029] The embodiments of the present invention are described above in conjunction with the accompanying drawings. What is disclosed is only the preferred embodiment of the present invention. However, the present invention is not limited to the above-mentioned specific implementation manner. The above-mentioned specific implementation manner is only illustrative rather than restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms and equivalent changes without departing from the scope of protection of the purpose of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A movable temperature testing device for testing a power module, characterized in that: The movable temperature testing device includes a movable testing clamp, a water tank and a water pump. The mobile testing clamp includes a box with a receiving space and a constant temperature plate. The power module to be tested is placed in the receiving space. The constant temperature plate and the box form a clamping structure to clamp and fix the power module. The constant temperature plate and the power module are in contact with each other. The constant temperature plate is provided with a water inlet and a water outlet. The constant temperature plate is connected to the water tank and the water pump through a water pipe through the water inlet and the water outlet to form a circulating water circuit. When the water pump is working, the water in the water tank flows in the circulating water circuit.

2. The movable temperature testing device for testing a power module according to claim 1, characterized in that: The mobile test clamp also includes a spring, a first end of the spring is fixed to the constant temperature plate, a second end of the spring is fixed to the box, and the power module is clamped and fixed in the deformation direction of the spring.

3. The movable temperature testing device for testing a power module according to claim 1, characterized in that: The constant temperature plate is a layered structure including an electric heating network layer and a water circulation pipeline layer. The water circulation pipeline layer is provided with the water inlet and the water outlet, and the water circulation pipeline layer is in contact with the power module.

4. The movable temperature testing device for testing a power module according to claim 3, characterized in that: The constant temperature plate is also used to monitor the temperature of water flowing through the water circulation pipeline layer, and dynamically adjust the overall temperature of the constant temperature plate through the electric heating network layer according to the temperature of the water.

5. The movable temperature testing device for testing a power module according to claim 1, characterized in that: The water tank further comprises a circuit control board and a heating device, wherein the heating device is in direct contact with the water in the water tank, and the circuit control board controls the heating device according to a preset program to adjust the temperature of the water in the water tank.

6. The movable temperature testing device for testing a power module according to claim 5, characterized in that: The water tank further comprises a fan, and the circuit control board controls the fan according to the preset program to adjust the temperature of the water in the water tank.

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