An external water cooling system for power cycle test

Abstract

The utility model discloses a kind of external water cooling systems, belong to power cycle test device technical field, specifically related to a kind of external water cooling system for power cycle test, comprising: circulating waterway assembly, temperature control component, host computer and test station;The test station is connected with the circulating waterway assembly, the temperature control component is installed on the waterway assembly, the host computer is simultaneously connected with the circulating waterway assembly and the temperature control component;The circulating waterway assembly includes: water inlet main pipe and independent waterway;The temperature control component includes: heat dissipation structure, absorption device and temperature probe;The utility model significantly improves the efficiency, accuracy and compatibility of power cycle test, especially suitable for new energy automobile, photovoltaic inverter and other fields of power module reliability verification.

Description

Technical Field

[0001] This utility model discloses an external water cooling system, belonging to the technical field of power cycle test devices, specifically relating to an external water cooling system for power cycle testing. Background Technology

[0002] Power cycling test is a key reliability testing method for evaluating the ability of power electronic devices (such as IGBTs, MOSFETs, SiC MOSFETs, diodes, etc.) to withstand thermomechanical stress under repeated switching operation. It directly simulates one of the most common failure modes of devices in practical applications—thermal fatigue failure caused by junction temperature fluctuations due to power loss.

[0003] Existing power cycling tests require the use of water cooling devices for temperature reduction, but traditional water cooling systems have the following problems:

[0004] 1. Traditional single-loop systems cannot test multiple groups of devices simultaneously;

[0005] 2. Traditional cooling systems cannot adjust individual parameters as needed, leading to test deviations;

[0006] 3. Traditional integrated systems are susceptible to electromagnetic interference from the host computer, resulting in low data accuracy;

[0007] 4. General-purpose tooling is difficult to fit into special heat dissipation structures, resulting in poor thermal contact. Utility Model Content

[0008] Purpose of the utility model: To provide an external water cooling system for power cycling tests, solving the problems mentioned above.

[0009] Technical solution: An external water cooling system for power cycle testing, comprising: a circulating water circuit assembly, a temperature control assembly, a host computer, and a test station;

[0010] The test station is connected to the circulating water circuit assembly, the temperature control assembly is installed on the water circuit assembly, and the host computer is connected to both the circulating water circuit assembly and the temperature control assembly.

[0011] The circulating water system component includes: a main inlet pipe and independent water channels;

[0012] The temperature control component includes: a heat dissipation structure, an absorption device, and a temperature probe.

[0013] In a further embodiment, the input end of the main water inlet pipe is connected to an external water source, and the output end is connected to the input end of the independent water channel.

[0014] In a further embodiment, there are at least three independent waterways, which are connected to the main water inlet pipe in parallel.

[0015] In a further embodiment, each independent waterway is equipped with a manual flow regulating valve and an electronic flow meter, the electronic flow meter being electrically connected to the host computer.

[0016] In a further embodiment, the temperature probe is installed at the inlet and outlet of the independent water channel, the temperature probe is electrically connected to the host computer, and the heat dissipation structure and the absorption device are installed inside the independent water channel.

[0017] In a further embodiment, the heat dissipation structure is a heat dissipation structure with a pin-fin power device module.

[0018] In a further embodiment, the output of each independent waterway is connected to at least four test stations.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model adopts 3 independent parallel water channels + 12 workstation expansion capability, supports high parallel testing, and improves efficiency by 300%;

[0021] 2. This utility model achieves precise control of the branch circuit, ensuring consistent operating conditions for each component;

[0022] 3. This utility model achieves accuracy of flow rate ≤ ±1% and temperature ±1℃, significantly improving reliability;

[0023] 4. This invention achieves tight thermal coupling, ensuring the authenticity of the experiment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] An external water cooling system for power cycling tests includes: a circulating water circuit assembly, a temperature control assembly, a host computer, and a test station;

[0029] The test station is connected to the circulating water circuit assembly, the temperature control assembly is installed on the water circuit assembly, and the host computer is connected to both the circulating water circuit assembly and the temperature control assembly.

[0030] The circulating water system component includes: a main inlet pipe and independent water channels;

[0031] The temperature control component includes: a heat dissipation structure, an absorption device, and a temperature probe.

[0032] In one embodiment, such as Figure 1 As shown, the input end of the main water inlet pipe is connected to an external water source, and the output end is connected to the input end of the independent water channel.

[0033] In one embodiment, such as Figure 1 As shown, there are at least three independent waterways, which are connected to the main inlet pipe in parallel.

[0034] In one embodiment, such as Figure 1 As shown, each independent waterway is equipped with a manual flow regulating valve and an electronic flow meter, and the electronic flow meter is electrically connected to the host computer.

[0035] In one embodiment, such as Figure 1 As shown, the temperature probe is installed at the inlet and outlet of the independent water channel, the temperature probe is electrically connected to the host computer, and the heat dissipation structure and the absorption device are installed inside the independent water channel.

[0036] In one embodiment, such as Figure 1 As shown, the heat dissipation structure is a heat dissipation structure for a power device module with pin fins.

[0037] In one embodiment, such as Figure 1 As shown, the output of each independent waterway is connected to at least four test stations.

[0038] Example 1: Device Operation Process

[0039] 1. Water circulation start-up

[0040] Cooling water is supplied to the tooling's main inlet pipe via an external water source and then distributed to three independent parallel water channels.

[0041] Each waterway is equipped with a manual flow regulating valve, allowing operators to manually adjust the flow rate of each waterway (range: 2–100 L / min) according to test requirements.

[0042] The electronic flow meter monitors the water flow of each channel in real time, and the data is uploaded to an independent host computer software.

[0043] 2. Temperature monitoring and heat exchange

[0044] Cooling water flows into a custom-designed water channel and passes through the heat dissipation structure of the pin-fin power device module, absorbing the heat generated by the device.

[0045] Each water channel is equipped with a PT100 temperature probe at its inlet / outlet to detect temperature differences in real time (detection range: 0–180℃, accuracy ±1℃).

[0046] Temperature difference data reflects the heat dissipation efficiency of power devices and is recorded by host computer software.

[0047] 3. Data Collection and Recording

[0048] Flow and temperature data are displayed in real time by independent host computer software, supporting both dynamic dot plots and data tables.

[0049] The software automatically saves historical data for analyzing the thermal stability of devices during power cycling tests.

[0050] 4. Multi-station parallel testing

[0051] The three independent water channels support up to 12 test stations (each channel can be expanded to 4 stations), which can simultaneously perform cyclic tests on multiple power modules.

[0052] Example 2: Usage

[0053] 1. Installation and Connection

[0054] Fix the power device module under test to the tooling fixture (water channel + oil channel structure) and connect the test leads (current line, signal acquisition line).

[0055] An external water supply pipeline is connected to the inlet of the tooling, and the outlet is connected to an external cooling device (such as a chiller).

[0056] The short-circuit copper strip is used to simulate the load of an actual circuit.

[0057] 2. Parameter settings and adjustments

[0058] Adjust the water flow rate of each channel manually and observe the flow meter reading until it reaches the target range.

[0059] Start the host computer software to monitor the flow rate, inlet and outlet water temperatures, and temperature difference curves in real time.

[0060] 3. Operation and Monitoring

[0061] A circulating current is applied to the power device to simulate its actual operating state.

[0062] The software automatically records changes in thermal parameters and triggers an alarm mechanism when the temperature or flow rate is abnormal (e.g., exceeding the limit by ±1%).

[0063] 4. Data Analysis

[0064] After the experiment, the flow rate and temperature data were exported to analyze the heat dissipation performance and lifespan degradation trend of the device.

[0065] This invention significantly improves the efficiency, accuracy, and compatibility of power cycle testing, and is particularly suitable for power module reliability verification in fields such as new energy vehicles and photovoltaic inverters.

[0066] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An external water-cooling system for power cycling tests, characterized in that, include: Circulating water circuit components, temperature control components, host computer, and testing station; The test station is connected to the circulating water circuit assembly, the temperature control assembly is installed on the water circuit assembly, and the host computer is connected to both the circulating water circuit assembly and the temperature control assembly. The circulating water system component includes: a main inlet pipe and independent water channels; The temperature control component includes: a heat dissipation structure, an absorption device, and a temperature probe.

2. The external water-cooling system for power cycling tests according to claim 1, characterized in that, The inlet of the main water pipe is connected to an external water source at its input end and to the input of the independent waterway at its output end.

3. The external water-cooling system for power cycling tests according to claim 2, characterized in that, The independent waterways are at least three in number and are connected to the main inlet pipe in parallel.

4. The external water-cooling system for power cycling tests according to claim 3, characterized in that, Each independent waterway is equipped with a manual flow regulating valve and an electronic flow meter, the electronic flow meter being electrically connected to the host computer.

5. An external water-cooling system for power cycling tests according to claim 1, characterized in that, The temperature probe is installed at the inlet and outlet of the independent water channel. The temperature probe is electrically connected to the host computer. The heat dissipation structure and the absorption device are installed inside the independent water channel.

6. An external water-cooling system for power cycling tests according to claim 5, characterized in that, The heat dissipation structure is a heat dissipation structure with pin-fin power device modules.

7. An external water-cooling system for power cycling tests according to claim 3, characterized in that, Each independent waterway's output end must be connected to at least four test stations.

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