Six-station integrated part temperature durability test bench

Abstract

The invention is applied to the technical field of thermal management integrated units, and particularly discloses a six-station integrated part temperature durability test board which comprises a test board frame module, an environment box module, a constant-temperature medium module, a medium circulation module and an automatic measurement and control module. According to the six-station integrated piece temperature durability test board, the six-station tested piece is arranged, the eleven water gaps are formed in the surface of the six-station tested piece, three test loops can be formed on the surface of the six-station tested piece by means of connection among the eleven water gaps and mutual connection among the water gaps, the water outlet of the unit and the water return port, a sample is filled with a medium R134a, and the temperature durability of the six-station integrated piece is tested. And a mixed solution of 50% ethylene glycol and 50% water in a volume ratio is used as a test medium, and different temperature and humidity conditions are set, so that durability tests in different directions can be carried out on the thermal management integrated part in a high-temperature aging test mode, a damp-heat durability mode and a temperature cycle durability mode.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management integrated units, and specifically to a six-station integrated component temperature endurance test bench. Background Art

[0002] Thermal management refers to a series of practices and technologies used to control the internal temperature of electronic components and systems. The core of thermal management is to prevent overheating, which can lead to system failures, performance degradation, and shortened equipment life. Therefore, thermal management can improve efficiency, enhance performance, and extend product life. Specifically, thermal management refers to the process of regulating and controlling its temperature or temperature difference using heating or cooling means. Thermal management can be seen everywhere in daily life, such as in mobile phones, computers, cars, rooms, and various industrial applications. An integrated circuit is a microelectronic device or component that, using a certain process, integrates components such as transistors, resistors, capacitors, and inductors required in a circuit, as well as the wiring, on a small piece or several small pieces of semiconductor wafers or dielectric substrates, and then packages them in a tube shell to form a micro-structure with the required circuit functions. A thermal management integrated unit refers to a unit system that uses a certain integrated circuit combination to achieve thermal management functions. Using thermal management integrated units to control heat is crucial in many industries and is essential for maintaining the efficiency and service life of products.

[0003] Since the thermal management integrated unit is the key to controlling the internal temperature of electronic components and systems, before the thermal management integrated unit is put into use, it is necessary to test the durability of the temperature cycle of the thermal management integrated unit, so that after the thermal management integrated unit is put into use, under long-term temperature change regulation, it can still maintain the thermal management function and avoid affecting the performance of the thermal management integrated unit due to long-term temperature changes in the thermal management system. Summary of the Invention

[0004] The purpose of the present invention is to provide a six-station integrated component temperature endurance test bench to solve the problem that before the thermal management integrated unit is put into use, it is necessary to conduct a durability test of the temperature cycle to facilitate the performance test of the thermal management integrated unit as mentioned in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A six-station integrated component temperature endurance test bench, including a test bench frame module, an environmental chamber module, a constant temperature medium module, a medium circulation module, and an automatic measurement and control module. The test bench frame module is the support structure of the test bench, and the test bench frame module is respectively connected to the environmental chamber module, the constant temperature medium module, the medium circulation module, and the automatic measurement and control module. The environmental chamber module is connected to the medium circulation module. The constant temperature medium module is connected to the medium circulation module. The automatic measurement and control module is connected to the medium circulation module;

[0006] Preferably, the test bench module includes a water supply connecting pipe and a return water connecting pipe. The test bench module is provided with a standard interface, which is connected to the fixture support of the device under test. A liquid receiving tray is arranged at the bottom of the test bench module, and an electrical measurement and control box is arranged on the test bench module.

[0007] With the above technical solution, the test bench module supports the test bench and the rest of the control structures.

[0008] Preferably, the environmental chamber module is configured with a front and rear two-way opening structure. Six workstations of the device under test are installed inside the environmental chamber module. A temperature regulation system is arranged inside the environmental chamber module. The temperature regulation system is provided with a PID temperature controller and an SCR power regulator. The PID temperature controller and the SCR power regulator are respectively connected to the refrigeration unit and the heating device. The temperature regulation system is provided with automatic protection mechanisms such as overheat protection, dry burning protection, and overcurrent protection. An exhaust system is arranged inside the environmental chamber module, and a filtering device is arranged inside the environmental chamber module.

[0009] With the above technical solution, the environmental chamber module can be used to control the environmental temperature during the test.

[0010] Preferably, the constant temperature medium module includes one set of high-temperature stainless steel liquid tanks and one set of low-temperature stainless steel liquid tanks. Composite thermal insulation materials are respectively arranged on the high-temperature stainless steel liquid tank and the low-temperature stainless steel liquid tank. The constant temperature medium module is provided with a refrigeration unit. The refrigeration unit in the constant temperature medium module uses a water-cooled two-stage semi-hermetic compressor for refrigeration, and adopts a heat exchange method combining a stainless steel plate and an internal circulation pump. The constant temperature medium module is provided with a heating device. The heating device in the constant temperature medium module uses indirect heating with heat-conducting oil and adopts a heat exchange method combining a stainless steel plate exchanger and an internal circulation pump.

[0011] With the above technical solution, the constant temperature medium module can be used to control the temperature during the test.

[0012] Preferably, the medium circulation module includes a test loop. The test loop internally includes three returns, namely HVAC, battery, and motor. The three returns in the test loop are supplied with liquid in a circulating manner corresponding to the branches of three liquid supply pumps. A pressure sensor and a temperature sensor are installed on the inlet side of each test loop, and a volume flowmeter and a pneumatic pressure regulating valve are installed on the outlet side of each test loop. The medium circulation module is provided with one set of closed liquid tanks. The closed liquid tanks are made of 304 stainless steel and are provided with a liquid filling port, a water inlet pipe, a water outlet pipe, a liquid level sensor, a safety exhaust valve, an overflow port, and a discharge port.

[0013] With the above technical solution, the medium circulation module can be used to control the test loop.

[0014] Preferably, the liquid supply structure of the medium circulation module adopts a method of one pump and one main liquid supply pipe in parallel to separate into six paths to six tested components, and the return pipes of the six tested components return water independently to the liquid tank.

[0015] Adopting the above technical solution, the independent liquid supply structure of the six tested components can be used to realize the test control of individual workstations.

[0016] Preferably, the automatic measurement and control module includes a PLC, an industrial control computer, a display, a PID instrument, a measurement sensor, a test power supply, and test operation software, etc. The PLC controls the input and storage of test instructions of the test bench. The industrial control computer is connected to the display and the PID instrument. The measurement sensor is connected to the industrial control computer. The test power supply provides energy for the test process of the test bench. The test operation software operates the test system through the industrial control computer.

[0017] Adopting the above technical solution, the automatic measurement and control module can be used to realize the automatic control of the test process.

[0018] Preferably, the six-station tested component includes eleven water ports. The eleven water ports are sequentially numbered from 1 to 11. The six-station tested component is provided with an EXV and an LCC.

[0019] Adopting the above technical solution, the eleven water ports on the surface of the six-station tested component can be used to realize the connection of the test circuit.

[0020] Preferably, the six-station integrated component temperature durability test bench includes high-temperature aging, damp heat durability, and temperature cycling durability test modes.

[0021] Adopting the above technical solution, multiple test modes can be used to conduct durability tests on the thermal management integrated unit in different directions.

[0022] Preferably, the usage method of the six-station integrated component temperature durability test bench is as follows:

[0023] High-temperature aging test mode: Connect the No. 1 water port of the six-station tested component to the No. 2 water port, connect the No. 3 water port to the return water port of unit 1, connect the No. 4 water port to the water outlet of unit 1, connect the No. 5 water port to the return water port of unit 2, connect the No. 6 water port to the water outlet of unit 2, connect the No. 7 water port to the return water port of unit 3, connect the No. 8 water port to the water outlet of unit 3, connect the No. 9 water port to the No. 10 water port, block the No. 11 water port, fully open the EXV, fill the R134a refrigerant from the LCC inlet, block other ports, fill the sample with the medium R134a on the refrigerant side, and the filling amount is 0.12 g / cm 3, connect a three-way water circulation unit on the coolant side. The test medium is a mixed solution with a volume ratio of 50% ethylene glycol and 50% water. One cycle is 48 hours, during which the water pump and valve do not operate and the circulating water path is not pressurized for 1 hour, and the circulating water path is actively pressurized for the remaining 47 hours to maintain the flow rate at 20 L / min, keep the water temperature at 90 °C, conduct repeated start-stop tests on the water pump, start for 10 s, stop for 5 s, operate at the rated speed during startup, the water valve starts to work, and continuously switch modes, pause for 10 s in each mode, with a test duration of 500 h and the test ambient temperature ≥ 95 °C;

[0024] Humid heat durability mode: Connect the No. 1 water port and No. 2 water port of the 6-station DUT, connect the No. 3 water port to the return water port of Unit 1, connect the No. 4 water port to the outlet water port of Unit 1, connect the No. 5 water port to the return water port of Unit 2, connect the No. 6 water port to the outlet water port of Unit 2, connect the No. 7 water port to the return water port of Unit 3, connect the No. 8 water port to the outlet water port of Unit 3, connect the No. 9 water port and No. 10 water port, block the No. 11 water port, fully open the EXV, fill R134a refrigerant from the LCC inlet, block other ports, fill the sample with medium R134a on the refrigerant side, and the filling amount is 0.12 g / cm 3 , connect a three-way water circulation unit on the coolant side. The test medium is a mixed solution with a volume ratio of 50% ethylene glycol and 50% water. One cycle is 48 hours, during which the water pump and valve do not operate and the circulating water path is not pressurized for 1 hour, and the circulating water path is actively pressurized for the remaining 47 hours to maintain the flow rate at 20 L / min, conduct repeated start-stop tests on the water pump, start for 10 s, stop for 5 s, operate at the rated speed during startup, the water valve starts to work, and continuously switch modes, pause for 10 s in each mode, and test the product at 65 °C and 93% RH for 500 h;

[0025] Temperature cycling durability mode: Connect the No. 1 water port and No. 2 water port of the 6-station DUT, connect the No. 3 water port to the return water port of Unit 1, connect the No. 4 water port to the outlet water port of Unit 1, connect the No. 5 water port to the return water port of Unit 2, connect the No. 6 water port to the outlet water port of Unit 2, connect the No. 7 water port to the return water port of Unit 3, connect the No. 8 water port to the outlet water port of Unit 3, connect the No. 9 water port and No. 10 water port, block the No. 11 water port, fully open the EXV, fill R134a refrigerant from the LCC inlet, block other ports, the high temperature ≥ 85 °C, the low temperature -40 °C, each of the high and low temperature sections is maintained for 35 min, the temperature change rate is (3 - 5) °C / min, 500 cycles, fill the sample with medium R134a on the refrigerant side, and the filling amount is 0.12 g / cm 3, connect a three-way water circulation unit on the coolant side, which corresponds to connecting 3 test pieces respectively. The test medium uses a mixed solution with a volume ratio of 50% ethylene glycol and 50% water. The water pump water valve in the low-temperature section does not operate, and the circulating water path does not actively supply pressure. Starting from the heating section, the circulating water path actively supplies pressure to maintain the flow rate at 20 L / min and the water temperature at 80 °C. When the ambient temperature is higher than 85 °C, the water pump conducts repeated start-stop tests, starting for 15 s and stopping for 10 s. When starting, it operates at the rated speed, the water valve starts to work, and continuously switches modes, pausing for 65 s in each mode. When the temperature in the high-temperature section starts to drop, the water pump water valve and the circulating water path stop actively operating. 80% of the cycles are carried out at the rated working voltage, 10% of the cycles are carried out at the lower limit of the working voltage, and 10% of the cycles are carried out at the upper limit of the working voltage.

[0026] By adopting the above technical solutions and setting different test parameters, durability tests in different directions of the thermal management integration unit can be achieved.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: The six-station integrated component temperature durability test bench:

[0028] 1. The present invention is provided with 6 test pieces at the stations. 11 water ports are arranged on the surface of the 6 test pieces at the stations. By using the connections between the 11 water ports and the mutual connections between the water ports and the water outlet and water return ports of the unit, 3 test circuits can be formed on the surface of the 6 test pieces at the stations. The sample is filled with the medium R134a, and a mixed solution with a volume ratio of 50% ethylene glycol and 50% water is used as the test medium. By setting different temperature and humidity conditions, durability tests in different directions of the thermal management integrated component can be realized in the high-temperature aging test mode, damp heat durability mode, and temperature cycle durability mode;

[0029] 2. The present invention is provided with an automatic measurement and control module. Before the test, the medium temperature, pressure, ambient temperature, selected station, voltage, and control parameters can be set in the automatic measurement and control module, and during the process, the inlet and outlet pressures, pressure differences, medium temperature, ambient chamber temperature, operating state of the test piece, operating electrical parameters, durability cycle number, etc. of the test piece are recorded in real time. The equipment has two operating modes, namely "automatic operation" and "manual operation", which are suitable for different usage places. Description of the Drawings

[0030] Figure 1 It is a schematic diagram of the module connection of the present invention;

[0031] Figure 2 It is a front view schematic diagram of the water ports of the 6-station test piece of the present invention;

[0032] Figure 3 It is a rear view schematic diagram of the water ports of the 6-station test piece of the present invention;

[0033] Figure 4Schematic diagram of the principle of the device of the present invention;

[0034] Figure 5 Schematic diagram of the humidity range of the test environment of the present invention;

[0035] Figure 6 Schematic diagram of the start and stop nodes of the water pump in the test mode of the present invention. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figure 1-6 , the present invention provides a technical solution: a six-station integrated component temperature endurance test bench.

[0038] The test bench module is the support structure of the test bench, and the test bench module is respectively connected to the environmental chamber module, the constant temperature medium module, the medium circulation module, and the automatic measurement and control module. The environmental chamber module is connected to the medium circulation module, the constant temperature medium module is connected to the medium circulation module, and the automatic measurement and control module is connected to the medium circulation module. The test bench module includes a water supply connecting pipe and a return water connecting pipe. The test bench module is provided with a standard interface, and the standard interface is connected to the workpiece fixture bracket to be measured. A liquid receiving tray is arranged at the bottom of the test bench module. The test bench module is provided with an electrical measurement and control box. The environmental chamber module is set to have a front and rear double-opening door structure. Six workpieces to be measured are installed inside the environmental chamber module. A temperature regulation system is arranged inside the environmental chamber module. The temperature regulation system is provided with a PID temperature controller and an SCR power regulator. The PID temperature controller and the SCR power regulator are respectively connected to the refrigeration unit and the heating device. The temperature regulation system is provided with automatic protection mechanisms such as overheat protection, dry burning protection, and overcurrent protection. An exhaust system is arranged inside the environmental chamber module, and a filtering device is arranged inside the environmental chamber module. The constant temperature medium module includes a set of high-temperature stainless steel liquid tanks and a set of low-temperature stainless steel liquid tanks. The high-temperature stainless steel liquid tank and the low-temperature stainless steel liquid tank are respectively provided with composite heat insulation materials. The constant temperature medium module is provided with a refrigeration unit. In the constant temperature medium module, the refrigeration unit uses a water-cooled two-stage semi-hermetic compressor for refrigeration, and adopts a heat exchange method combining a stainless steel plate and an internal circulation pump. In the constant temperature medium module, the heating device uses indirect heating with heat transfer oil and adopts a heat exchange method combining a stainless steel plate heat exchanger and an internal circulation pump. The medium circulation module includes a test loop. The test loop internally contains three returns, namely HVAC, battery, and motor. The three returns in the test loop are supplied with liquid in a circulating manner corresponding to the branches of three liquid supply pumps. A pressure sensor and a temperature sensor are installed on the inlet side of each test loop, and a volumetric flowmeter and a pneumatic pressure regulating valve are installed on the outlet side of each test loop. The medium circulation module is provided with a set of closed liquid tanks. The closed liquid tanks are made of 304 stainless steel and are provided with a liquid filling port, a water inlet pipe, a water outlet pipe, a liquid level sensor, a safety exhaust valve, an overflow port, and a discharge port. The liquid supply structure of the medium circulation module adopts a method of one pump and one liquid supply main pipe in parallel to separate into six paths to six workpieces to be measured, and the return liquid pipes of the six workpieces to be measured return to the liquid tank independently. The automatic measurement and control module includes a PLC, an industrial control computer, a display, a PID instrument, a measurement sensor, a test power supply, and a test operation software, etc. The PLC controls the input and storage of the test instructions of the test bench. The industrial control computer is connected to the display and the PID instrument. The measurement sensor is connected to the industrial control computer. The test power supply provides energy for the test process of the test bench. The test operation software operates the test system through the industrial control computer;

[0039] Such as Figure 1As shown, the test bench module is respectively connected to the environmental chamber module, the constant temperature medium module, the medium circulation module, and the automatic measurement and control module. The test bench module is equipped with the hardware devices required for the operation of the test bench. The test bench module is connected to the environmental chamber module. Inside the environmental chamber module, 6 workpieces to be tested are installed. The internal temperature is controlled by a PID temperature controller and an SCR power regulator to control the refrigeration unit and the stainless steel air heater respectively. Balanced temperature regulation achieves good constant temperature control, and programmable temperature cycling can be realized. The ethylene glycol heating will generate steam. The environmental chamber is equipped with an exhaust system. The leaked waste liquid is equipped with a filtration device to return the clean liquid to the replenishment tank. The constant temperature medium module includes 1 set of high and low temperature stainless steel liquid tanks each. The liquid tanks are equipped with composite insulation materials. In the constant temperature medium module, the refrigeration unit uses a water-cooled two-stage semi-hermetic compressor for refrigeration, and the heat exchange method combines a stainless steel plate and an internal circulation pump. In the constant temperature medium module, the heating device uses indirect heating with heat transfer oil, and the heat exchange method combines a stainless steel plate exchanger and an internal circulation pump to ensure the physical properties of the medium are stable in the high temperature section. The medium circulation module is provided with a closed liquid tank and a test loop. The parameters of the test loop can be monitored in real time by using the set pressure sensor, temperature sensor, volume flow meter, and pneumatic pressure regulating valve. The automatic measurement and control module is provided with corresponding control and monitoring structures to control and monitor the test process of the test bench in real time.

[0040] The 6 workpieces to be tested include 11 water ports. The 11 water ports are sequentially numbered from 1 to 11. The 6 workpieces to be tested are provided with an EXV and an LCC. The six-station integrated component temperature durability test bench includes high-temperature aging, damp heat durability, and temperature cycling durability test modes. The usage method of the six-station integrated component temperature durability test bench is as follows: High-temperature aging test mode: Connect the No. 1 water port of the 6 workpieces to be tested to the No. 2 water port, the No. 3 water port to the return water port of Unit 1, the No. 4 water port to the outlet water port of Unit 1, the No. 5 water port to the return water port of Unit 2, the No. 6 water port to the outlet water port of Unit 2, the No. 7 water port to the return water port of Unit 3, the No. 8 water port to the outlet water port of Unit 3, the No. 9 water port to the No. 10 water port, block the No. 11 water port, fully open the EXV, fill R134a refrigerant from the LCC inlet, block other ports, fill the sample with the medium R134a on the refrigerant side, and the filling amount is 0.12 g / cm 3 , connect a three-way water circulation unit on the coolant side. The test medium is a mixed solution with a volume ratio of 50% ethylene glycol and 50% water. One cycle is 48 h, during which the water pump and water valve do not operate for 1 h and the circulating water path is not pressurized. In the remaining 47 h, the circulating water path is actively pressurized to maintain the flow rate at 20 L / min and the water temperature at 90 °C. The water pump is tested for repeated start and stop. It starts for 10 s and stops for 5 s. When starting, it runs at the rated speed, the water valve starts to work, and the mode is continuously switched. It pauses for 10 s in each mode, and the test duration is 500 h. The test environmental temperature is ≥95 °C;

[0041] Wet Heat Durability Mode: Connect the No. 1 water inlet of the 6-station DUT to the No. 2 water inlet, the No. 3 water inlet to the return water inlet of Unit 1, the No. 4 water inlet to the water outlet of Unit 1, the No. 5 water inlet to the return water inlet of Unit 2, the No. 6 water inlet to the water outlet of Unit 2, the No. 7 water inlet to the return water inlet of Unit 3, the No. 8 water inlet to the water outlet of Unit 3, the No. 9 water inlet to the No. 10 water inlet, block the No. 11 water inlet, fully open the EXV, charge R134a refrigerant from the LCC inlet, block other ports, fill the sample with medium R134a on the refrigerant side, and the filling amount is 0.12 g / cm 3 , connect a three-way water circulation unit on the coolant side. The test medium uses a mixed solution of 50% ethylene glycol and 50% water by volume ratio. One cycle is 48 h, during which the water pump valve does not operate and the circulating water path does not supply pressure for 1 h, and the circulating water path actively supplies pressure for the remaining 47 h to maintain the flow rate at 20 L / min. The water pump is tested for repeated start and stop, starting for 10 s and stopping for 5 s. When starting, it operates at the rated speed, the water valve starts to work, and the mode is continuously switched, pausing for 10 s in each mode. The product is tested at 65°C and 93% RH for 500 h;

[0042] Temperature Cycling Durability Mode: Connect the No. 1 water inlet of the 6-station DUT to the No. 2 water inlet, the No. 3 water inlet to the return water inlet of Unit 1, the No. 4 water inlet to the water outlet of Unit 1, the No. 5 water inlet to the return water inlet of Unit 2, the No. 6 water inlet to the water outlet of Unit 2, the No. 7 water inlet to the return water inlet of Unit 3, the No. 8 water inlet to the water outlet of Unit 3, the No. 9 water inlet to the No. 10 water inlet, block the No. 11 water inlet, fully open the EXV, charge R134a refrigerant from the LCC inlet, block other ports, the high temperature is ≥85°C, the low temperature is -40°C, each of the high and low temperature sections is maintained for 35 min, and the temperature change rate is (3 - 5)°C / min for 500 cycles. Fill the sample with medium R134a on the refrigerant side, and the filling amount is 0.12 g / cm 3 , connect a three-way water circulation unit on the coolant side, which is respectively connected to 3 DUTs. The test medium uses a mixed solution of 50% ethylene glycol and 50% water by volume ratio. The water pump valve does not operate and the circulating water path does not actively supply pressure in the low temperature section. Starting from the heating section, the circulating water path actively supplies pressure to maintain the flow rate at 20 L / min, and the water temperature is 80°C. When the ambient temperature is higher than 85°C, the water pump is tested for repeated start and stop, starting for 15 s and stopping for 10 s. When starting, it operates at the rated speed, the water valve starts to work, and the mode is continuously switched, pausing for 65 s in each mode. When the temperature in the high temperature section starts to drop, the water pump valve and the circulating water path stop actively operating. 80% of the cycles are carried out at the rated working voltage, 10% of the cycles are carried out at the lower limit of the working voltage, and 10% of the cycles are carried out at the upper limit of the working voltage;

[0043] As Figures 2-6 shown, connect the water inlets on the surface of the 6-station DUT in the following way, where the positions of each water inlet number are asFigure 2 and Figure 3 The No. 1 water inlet is connected to the No. 2 water inlet, the No. 3 water inlet is connected to the water return port of Unit 1, the No. 4 water inlet is connected to the water outlet of Unit 1, the No. 5 water inlet is connected to the water return port of Unit 2, the No. 6 water inlet is connected to the water outlet of Unit 2, the No. 7 water inlet is connected to the water return port of Unit 3, the No. 8 water inlet is connected to the water outlet of Unit 3, the No. 9 water inlet is connected to the No. 10 water inlet, the No. 11 water inlet is blocked, the EXV is fully opened, the R134a refrigerant is filled from the LCC inlet, other ports are blocked, and different test parameters are set by using the automatic measurement and control module, so as to realize different test modes. By changing the temperature and humidity, the high-temperature aging test mode, damp heat endurance mode and temperature cycling endurance mode of the thermal management integration unit can be controlled, so as to carry out durability tests on the thermal management integration unit in different directions.

[0044] Working principle: The present invention is provided with a 6-station workpiece under test, and 11 water inlets are arranged on the surface of the 6-station workpiece under test. By using the connections between the 11 water inlets and the connections between the water inlets and the water outlets and water return ports of the units, 3 test circuits can be realized on the surface of the 6-station workpiece under test. The sample is filled with the medium R134a, and a mixed solution with a volume ratio of 50% ethylene glycol and 50% water is used as the test medium. By controlling different temperature and humidity parameters through the automatic measurement and control module, the high-temperature aging test mode, damp heat endurance mode and temperature cycling endurance mode can be realized. Different durability tests can be carried out on the thermal management integration component by using different test modes.

[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Six-station integrated component temperature durability test bench, including test bench module, environmental chamber module, constant temperature medium module, medium circulation module and automatic measurement and control module, characterized by: The test bench module is the supporting structure of the test bench, and the test bench module is respectively connected to the environmental chamber module, the constant temperature medium module, the medium circulation module and the automatic measurement and control module. The environmental chamber module is connected to the medium circulation module, the constant temperature medium module is connected to the medium circulation module, and the automatic measurement and control module is connected to the medium circulation module.

2. The six-station integrated component temperature durability test bench according to claim 1 is characterized in that: The test bench module includes a water supply connecting pipe and a return connecting pipe. The test bench module is provided with a standard interface, and the standard interface is connected to the tooling bracket of the test piece. A liquid receiving tray is provided at the bottom of the test bench module, and the test bench module is provided with an electrical measurement and control box.

3. The six-station integrated component temperature durability test bench according to claim 1 is characterized in that: The environmental chamber module is configured to have a front and rear bidirectional door opening structure, 6-station test pieces are installed inside the environmental chamber module, a temperature regulation system is provided inside the environmental chamber module, the temperature regulation system is provided with a PID temperature controller and an SCR power regulator, the PID temperature controller and the SCR power regulator are respectively connected to the refrigeration unit and the heating device, the temperature regulation system is provided with automatic protection mechanisms such as overheating protection, empty burning protection and overcurrent protection, an exhaust system is provided inside the environmental chamber module, and a filtering device is provided inside the environmental chamber module.

4. The six-station integrated component temperature durability test bench according to claim 1 is characterized in that: The constant temperature medium module includes a set of high-temperature stainless steel liquid tanks, and the constant temperature medium module includes a set of low-temperature stainless steel liquid tanks. The high-temperature stainless steel liquid tank and the low-temperature stainless steel liquid tank are respectively provided with composite insulation materials. The constant temperature medium module is provided with a refrigeration unit. The refrigeration unit in the constant temperature medium module adopts a water-cooled two-stage semi-enclosed compressor unit for refrigeration, and adopts a heat exchange method combining a stainless steel plate with an internal circulation pump. The constant temperature medium module is provided with a heating device. The heating device in the constant temperature medium module adopts indirect heating with heat transfer oil, and adopts a heat exchange method combining a stainless steel plate with an internal circulation pump.

5. The six-station integrated component temperature durability test bench according to claim 1, characterized in that: The medium circulation module includes a test loop, which contains three return flows such as HVAC, battery and motor. The three loops in the test loop correspond to the liquid supply circulation of the branches of three liquid supply pumps. A pressure sensor and a temperature sensor are installed on the inlet side of each test loop, and a volume flow meter and a pneumatic pressure regulating valve are installed on the outlet side of each test loop. The medium circulation module is provided with a set of sealed liquid tanks, which are made of 304 stainless steel. The sealed liquid tank is provided with a liquid filling port, a water inlet pipe, a water outlet pipe, a liquid level sensor, a safety exhaust valve, an overflow port and a discharge port.

6. The six-station integrated component temperature durability test bench according to claim 5, characterized in that: The liquid supply structure of the medium circulation module adopts a method of 1 pump and 1 liquid supply main pipe in parallel to separate 6 routes to 6 tested parts, and the return pipes of the 6 tested parts return water to the liquid tank independently.

7. The six-station integrated component temperature durability test bench according to claim 1, characterized in that: The automatic measurement and control module includes PLC, industrial control computer, display, PID instrument, measurement sensor, test power supply and test operation software, etc. The PLC controls the input and storage of test instructions of the test bench, the industrial control computer is connected to the display and PID instrument, the measurement sensor is connected to the industrial control computer, the test power supply provides energy for the test process of the test bench, and the test operation software operates the test system through the industrial control computer.

8. The six-station integrated component temperature durability test bench according to claim 3 is characterized in that: The 6-station test piece includes 11 water outlets, and the 11 water outlets are numbered 1-11 in sequence. The 6-station test piece is provided with an EXV, and the 6-station test piece is provided with an LCC.

9. The six-station integrated component temperature durability test bench according to claim 1, characterized in that: The six-station integrated component temperature durability test bench includes high temperature aging, wet heat durability and temperature cycle durability test modes.

10. The six-station integrated component temperature durability test bench according to claim 9, characterized in that: The method of using the six-station integrated component temperature durability test bench is as follows: High temperature aging test mode: connect the No. 1 water inlet of the 6-station DUT to the No. 2 water inlet, No. 3 water inlet to the return water inlet of unit 1, No. 4 water inlet to the outlet of unit 1, No. 5 water inlet to the return water inlet of unit 2, No. 6 water inlet to the outlet of unit 2, No. 7 water inlet to the return water inlet of unit 3, No. 8 water inlet to the outlet of unit 3, No. 9 water inlet to No. 10 water inlet, No. 11 water inlet blocked, EXV fully opened, R134a refrigerant filled from the LCC inlet, other inlets blocked, and the sample filled with medium R134a on the refrigerant side, with a filling amount of 0.12g / cm 3 , connect three-way water circulation unit on the coolant side, the test medium is a mixed solution of 50% ethylene glycol and 50% water by volume, 48 hours for a cycle, of which the water pump and water valve do not run and the circulating water circuit is not pressurized for 1 hour, and the circulating water circuit actively supplies pressure for the remaining 47 hours to maintain the flow rate at 20L / min and the water temperature at 90℃. The water pump is repeatedly started and stopped, starting for 10s and stopping for 5s. It runs at rated speed when starting, the water valve starts to work, and the mode is continuously switched, pausing for 10s in each mode. The test duration is 500h, and the test environment temperature is ≥95℃; Wet heat durability mode: connect the No. 1 water inlet of the 6-station DUT to the No. 2 water inlet, the No. 3 water inlet to the return water inlet of unit 1, the No. 4 water inlet to the outlet of unit 1, the No. 5 water inlet to the return water inlet of unit 2, the No. 6 water inlet to the outlet of unit 2, the No. 7 water inlet to the return water inlet of unit 3, the No. 8 water inlet to the outlet of unit 3, the No. 9 water inlet to the No. 10 water inlet, the No. 11 water inlet is blocked, the EXV is fully opened, and R134a refrigerant is charged from the LCC inlet, and other ports are blocked. The sample is filled with medium R134a on the refrigerant side, and the filling amount is 0.12g / cm 3 , connect a three-way water circulation unit on the coolant side, use a mixed solution of 50% ethylene glycol and 50% water by volume as the test medium, 48 hours as a cycle, of which the water pump and water valve do not operate and the circulating water circuit does not supply pressure for 1 hour, and the circulating water circuit actively supplies pressure for the remaining 47 hours to maintain the flow rate at 20L / min, and the water pump is repeatedly started and stopped for 10 seconds and stopped for 5 seconds. When starting, it runs at the rated speed, the water valve starts to work, and the mode is continuously switched, pausing for 10 seconds in each mode. The product is tested at 65℃ and 93%RH for 500 hours; Temperature cycle endurance mode: connect the No. 1 water inlet of the 6-station DUT to the No. 2 water inlet, No. 3 water inlet to the return water inlet of unit 1, No. 4 water inlet to the outlet of unit 1, No. 5 water inlet to the return water inlet of unit 2, No. 6 water inlet to the outlet of unit 2, No. 7 water inlet to the return water inlet of unit 3, No. 8 water inlet to the outlet of unit 3, No. 9 water inlet to No. 10 water inlet, No. 11 water inlet blocked, EXV fully opened, R134a refrigerant filled from the LCC inlet, other ports blocked, high temperature ≥85℃, low temperature -40℃, high and low temperature sections each kept for 35min, temperature change rate (3~5)℃ / min, 500 cycles, use medium R134a to fill the sample on the refrigerant side, the filling amount is 0.12g / cm 3 , connect three water circulation units on the coolant side, and connect three test pieces respectively. The test medium uses a mixed solution of 50% ethylene glycol and 50% water by volume. The water pump and water valve in the low-temperature section do not run, and the circulating water circuit does not actively supply pressure. Starting from the heating section, the circulating water circuit actively supplies pressure to maintain the flow rate at 20L / min, the water temperature is 80℃, and when the ambient temperature is higher than 85℃, the water pump is repeatedly started and stopped. It starts for 15s and stops for 10s. It runs at rated speed when starting, the water valve starts working, and continuously switches modes, pausing for 65s in each mode. When the temperature in the high-temperature section begins to drop, the water pump, water valve and circulating water circuit stop actively running. 80% of the cycles are carried out at the rated working voltage, 10% of the cycles are carried out at the lower limit of the working voltage, and 10% of the cycles are carried out at the upper limit of the working voltage.

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