A domain controller high and low temperature aging test equipment

Abstract

The application discloses a kind of domain controller high-low temperature aging test equipment, it is related to domain controller test technical field;The equipment includes test frame, aging chamber and carrier assembly, temperature control system is provided on the aging chamber, the carrier of the test frame is installed for supporting carrier assembly, movable rack that is cooperated with carrier assembly is installed on carrier, the carrier assembly includes carrier main body, and accommodating cavity that receives domain controller is provided in carrier main body.The application makes the air blowing head towards the specific part of domain controller before detection, so that, in addition to temperature control system to the inside of test frame is carried out temperature control when detecting, using air blowing head can accurately deliver airflow to the corresponding position on the surface of domain controller, make the directional airflow consistent with the ambient temperature continuously reach the high heat flux density position on the surface of domain controller, weaken the local temperature rise deviation caused by surface stagnation boundary layer, make the reproducibility of aging temperature profile in the local improve.

Description

Technical Field

[0001] This invention relates to the field of domain controller testing technology, and in particular to a domain controller high and low temperature aging test device. Background Technology

[0002] As the core computing unit of the vehicle's electronic and electrical architecture, the domain controller integrates various high-computing functions such as autonomous driving, body control, and infotainment. Since domain controllers are typically located in the engine compartment or driver's cabin, where the operating environment experiences drastic temperature variations and integrates numerous high-power chips, their long-term operational capability under extreme temperature conditions is a key concern. Currently, the industry primarily relies on high and low temperature test chambers or walk-in aging chambers for high and low temperature aging tests of domain controllers. Existing technologies typically employ the following methods: The device under test (DUT) is placed in a temperature chamber, and the entire chamber is heated and cooled using a heating and cooling system. However, this method cannot be used for targeted testing of the high heat flux density areas on the surface of domain controllers. Existing test fixtures are mostly fixed structures with non-adjustable air outlet positions. Since the heat source locations vary among different domain controller models, a fixed airflow angle cannot meet diverse testing needs, resulting in limited test results.

[0003] More critically, during high and low temperature aging cycles ranging from -40℃ to +85℃ (extended to +105℃ for some automotive-grade conditions), localized heat accumulation easily forms above the high-power chips (SoC, power MOS, power inductors) on the domain controller surface, resulting in a 2℃ to 15℃ deviation between the surface microenvironment and the average temperature of the chamber space. If relying solely on natural convection of the uniformly circulated air within the chamber, this deviation manifests inconsistently at different stages of the high and low temperature cycles, leading to unreproducible aging stress. Therefore, it is necessary to controllably guide the directional airflow at the same temperature as the environment to the high heat flux density area on the surface without introducing an independent second temperature zone, and maintain the long-term stability of the jet geometry in a lockable manner. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high and low temperature aging test device for domain controllers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A domain controller high and low temperature aging test equipment includes a test rack, an aging chamber and a carrier assembly. The aging chamber is equipped with a temperature control system. The test rack is equipped with a support frame for supporting the carrier assembly. The support frame is equipped with a movable frame that cooperates with the carrier assembly. The carrier assembly includes a carrier body and a receiving cavity for accommodating the domain controller is provided inside the carrier body. The temperature control system has multiple air outlets at its bottom, each connected to a vent seat via an air passage structure. The vent seat is fixed to a movable frame, which has multiple support rods. Movable blocks are movably mounted on the outer sides of the support rods, and annular sleeves are movably mounted on the outer sides of the movable blocks. The movable blocks are spherical, and the annular sleeve has a spherical structure on its annular wall near the movable blocks that matches the movable blocks. An air blowing pipe is connected to the top of the annular sleeve, with one end of the air blowing pipe communicating with the vent seat. An air blowing head is located at the bottom of the annular sleeve, and a cavity is provided inside the annular sleeve, through which the air blowing head communicates with the air blowing pipe. The side of the annular sleeve has a fixing part for fixing the annular sleeve to the movable blocks. The air supply air of the blowing head is taken from the circulating air in the aging chamber regulated by the temperature control system. The angle θ between the central axis of the blowing head nozzle and the normal of the area to be measured on the upper surface of the domain controller satisfies 15°≤θ≤75°. The distance H between the end face of the blowing head nozzle and the area to be measured on the surface of the domain controller satisfies 20mm≤H≤80mm.

[0006] As a preferred embodiment of the present invention: the fixing part includes a pressing column, and a short tube penetrating the annular sleeve is provided on the side of the annular sleeve. The pressing column is slidably installed inside the short tube. One end of the pressing column extends out of the outside of the short tube, and an annular elastic connecting part is connected to the end side wall. The annular elastic connecting part is connected to the outer surface of the annular sleeve. Based on the force of the annular elastic connecting part, the end of the pressing column near the movable block is in close contact with the movable block. Based on the friction force, the annular sleeve is fixed.

[0007] As a preferred embodiment of the present invention: the air path structure includes an air outlet pipe, one end of which is connected to an air outlet, and an air path connector is connected to one end of the air outlet pipe. A first vertical pipe is provided on the test frame, and an air outlet hole is provided on one side of the first vertical pipe. A second vertical pipe is provided on the test frame, and openings are provided at the top of the first and second vertical pipes. The air path connector is detachably installed in the openings of the first and second vertical pipes. A horizontally arranged horizontal pipe is installed on the second vertical pipe, and a connecting pipe is installed on one side of the horizontal pipe. A connector is provided at the end of the connecting pipe, and an insertion port adapted to the connector is provided on the vent seat. The connector is detachably installed in the insertion port.

[0008] As a preferred embodiment of the present invention: an interface conversion board is provided on the main body of the carrier, and the interface conversion board is detachably electrically connected to the domain controller via a connecting cable; a connector is provided on the movable frame to connect to the interface conversion board of the main body of the carrier; a power supply and distribution system is provided on the test frame, and the connector of the movable frame is connected to the power supply and distribution system; a host computer system is provided on the side of the aging chamber, and the power supply and distribution system of the test frame is connected to the host computer system via a signal during testing; a power socket for electrical connection of the power supply and distribution system is provided in the aging chamber, and the power supply and distribution system is connected to an external power supply system through the power socket.

[0009] As a preferred embodiment of the present invention: a first positioning post is fixed on the carrier frame, and first positioning frames are provided on both sides of the carrier body. When the carrier body is placed on the carrier frame, the first positioning post is inserted into the first positioning frame. A guide rod is fixed on the carrier frame, and the movable frame slides along the outer wall of the guide rod. The movable frame and the carrier frame are connected by a support spring. A vertical frame is fixed on the carrier frame, and an arc-shaped pressure frame is rotatably mounted on the vertical frame through the movable frame via an installation shaft. An operating handle is fixed at one end of the arc-shaped pressure frame, and a clamping frame is fixed on the movable frame. The clamping frame is located on the movement trajectory of the operating handle. When the operating handle rotates based on the installation shaft and is clamped into the clamping frame, the movable frame is pressed downward by the arc-shaped pressure frame, and the connector of the movable frame is electrically connected to the interface conversion plate of the carrier body.

[0010] As a preferred embodiment of the present invention: a second positioning frame is installed on the main body of the carrier, a second positioning post adapted to the connector is provided at the bottom of the movable frame, a pressure plate is provided on the movable frame, and when the arc-shaped pressure frame presses the movable frame downward into place, the second positioning post is inserted into the second positioning frame, and the pressure plate is pressed against the top of the domain controller.

[0011] As a preferred embodiment of the present invention: a column is fixed to the inner side of the vehicle body, and a clamping frame is slidably connected to the outer wall of the column, and the clamping frame and the vehicle body are connected by a clamping spring.

[0012] As a preferred embodiment of the present invention: the bottom of the aging chamber is provided with a protruding strip, the top surface of the protruding strip is arc-shaped, a lifting control part for controlling the raising and lowering of the protruding strip is provided on one side of the aging chamber, and a roller is installed at the bottom of the test frame. After the protruding strip rises, the outer walls of two adjacent protruding strips are tangent to the annular outer wall of the roller, thereby limiting and fixing the roller.

[0013] As a preferred embodiment of the present invention: the lifting control unit includes a hydraulic cylinder, which is fixed to the side of the aging chamber. The output end of the hydraulic cylinder is fixed to a lifting frame, and a protrusion is fixed to the lifting frame. A strip-shaped opening is provided at the bottom of the test frame. The side of the strip-shaped opening near the protrusion has an arc-shaped structure that matches the protrusion. When the protrusion moves to the highest point within its stroke, it achieves the limiting and fixing of the roller and the sealing of the strip-shaped opening.

[0014] As a preferred embodiment of the present invention: a circulation chamber is provided on the side of the aging chamber, and multiple U-shaped pipes are installed in the circulation chamber. A fan is installed in the U-shaped pipes, and the two ends of the U-shaped pipes are connected to the interior of the aging chamber.

[0015] Furthermore, to ensure that the air blowing head does not drift at an angle during the alternating aging period of -40℃ to +85℃ for several days, the fixing part, in addition to the elastic pre-tightening friction pre-positioning, can also be equipped with a manually operable rigid locking substructure (set screw type or clamp type), so that the position of the annular sleeve relative to the movable block is rigidly locked after adjustment; at the same time, the nozzle geometry, spray distance H and spray angle θ of the air blowing head fall within the feasible empirical window, ensuring that the airflow can effectively penetrate the surface stagnant boundary layer without causing local cold / hot stress concentration.

[0016] The beneficial effects of this invention are as follows: 1. This invention, by setting up structures such as an air blowing head, allows for the adjustment of the position of the movable block on the support rod before testing, followed by adjustment of the position of the annular sleeve on the outside of the movable block, and fixation by a fixing part. This ensures that the air blowing head faces a specific part of the domain controller. Therefore, during testing, in addition to the temperature control system controlling the temperature inside the test fixture, the air blowing head can precisely deliver airflow to the corresponding position on the surface of the domain controller. This ensures that a directional airflow consistent with the ambient temperature is continuously delivered to high heat flux density areas on the domain controller surface (such as above the SoC package or near the power inductor), thus reducing heat loss. The local temperature rise deviation caused by the surface stagnant boundary layer improves the reproducibility of the aging temperature profile in that local area. By comparing the aging operation of the same model of domain controller sample in both locked and unlocked air blowing head states, the deviation of the hot spot temperature from the average temperature inside the chamber can be reduced from +3℃~+12℃ when unguided to within the range of +0.5℃~+2.5℃ (depending on the power consumption level and the selection of H / θ / d), and the angle drift is ≤±1° during continuous alternating operation for more than 96 hours after rigid locking. The air blowing head position is easy to adjust and has high flexibility of use.

[0017] 2. By setting a fixing part, the present invention can use a pull ring to pull the extrusion column to both sides. After adjusting the position of the annular sleeve, the pull ring is released. Based on the rebound force of the annular elastic connection part, the end of the extrusion column is in close contact with the surface of the movable block, preventing the annular sleeve from sliding on the outside of the movable block, thus achieving the purpose of fixing.

[0018] 3. This invention replaces the traditional messy hose connection method by modularly connecting the gas line connector to the openings at the top of the first and second risers. This design not only makes the internal wiring of the test frame neat and avoids pipe entanglement and interference, but also delivers the cold / heat source more directly to the vicinity of the test station, reducing energy loss along the way and improving the temperature control response speed. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a domain controller high and low temperature aging test device proposed in this invention; Figure 2This is a schematic diagram of the high and low temperature aging test equipment for a domain controller proposed in this invention from another angle; Figure 3 This is a cross-sectional structural schematic diagram of the aging chamber of a domain controller high and low temperature aging test equipment proposed in this invention; Figure 4 This is a schematic diagram of the test rack of a domain controller high and low temperature aging test equipment proposed in this invention; Figure 5 This is a schematic diagram of the structure of a domain controller high and low temperature aging test equipment where the connector and the vent seat are separated, as proposed in this invention. Figure 6 This is a schematic diagram of the structure of the movable frame of the domain controller high and low temperature aging test equipment proposed in this invention after disassembly; Figure 7 This is a cross-sectional schematic diagram of the annular sleeve and movable block on the movable frame of a domain controller high and low temperature aging test equipment proposed in this invention; Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram of the structure of a carrier component for a domain controller high and low temperature aging test equipment proposed in this invention.

[0020] In the diagram: 1-Test rack; 2-Power supply and distribution system; 3-Temperature control system; 4-Aging chamber; 5-Host computer system; 6-Air connector; 7-Outlet duct; 8-Outlet; 9-U-shaped pipe; 10-Hydraulic cylinder; 11-Lifting frame; 12-Roller; 13-Protruding strip; 14-First upright; 15-Second upright; 16-Carrier assembly; 17-Outlet; 18-Carrier frame; 19-Connecting pipe; 20-Horizontal pipe; 21-Support spring; 22-Guide rod; 23-Moveable frame; 24-Arc-shaped pressure frame ; 25-Operating handle; 26-Connector; 27-Blowing pipe; 28-Ventilation seat; 29-Upright frame; 30-Carrier body; 31-Support rod; 32-First positioning post; 33-Domain controller; 34-Card holder; 35-Pressure plate; 36-Second positioning frame; 37-First positioning frame; 38-Second positioning post; 39-Annular sleeve; 40-Squeezing post; 41-Moving block; 42-Blowing head; 43-Annular elastic connection part; 44-Pull ring; 45-Clamping spring; 46-Upright column; 47-Clamping frame. Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] Example 1: A domain controller high and low temperature aging test device, such as Figures 1-9 As shown, the device includes a test rack 1, an aging chamber 4, and a carrier assembly 16. The aging chamber 4 is equipped with a temperature control system 3. The test rack 1 is equipped with a carrier frame 18 for supporting the carrier assembly 16. The carrier frame 18 is equipped with a movable frame 23 that cooperates with the carrier assembly 16. The carrier assembly 16 includes a carrier body 30, and the carrier body 30 is provided with a cavity for accommodating the domain controller 33. The temperature control system 3 has multiple air outlets 8 at its bottom. The air outlets 8 are connected to a vent seat 28 via an air passage structure. The vent seat 28 is fixed to a movable frame 23. Multiple support rods 31 are fixed to the movable frame 23. Movable blocks 41 are movably installed on the outer side of the support rods 31. An annular sleeve 39 is movably installed on the outer side of the movable block 41. The movable block 41 has a spherical structure. The annular sleeve 39 has an annular wall near the movable block 41 with a spherical structure that matches the movable block 41. An air blowing pipe 27 is connected to the top of the annular sleeve 39. One end of the air blowing pipe 27 is connected to the vent seat 28. An air blowing head 42 is provided at the bottom of the annular sleeve 39. A cavity is provided inside the annular sleeve 39. The air blowing head 42 is connected to the air blowing pipe 27 through the cavity. The side of the annular sleeve 39 is provided with a fixing part for fixing the annular sleeve 39 to the movable block 41. By setting up structures such as the air blowing head 42, the position of the movable block 41 on the support rod 31 can be adjusted before testing, and the position of the annular sleeve 39 on the outside of the movable block 41 can be adjusted and fixed by the fixing part, so that the air blowing head 42 is oriented towards a specific part of the domain controller 33. Thus, during testing, in addition to the temperature control system 3 controlling the temperature inside the test fixture 1, the air blowing head 42 can accurately deliver airflow to the corresponding position on the surface of the domain controller 33, so that the directional airflow consistent with the ambient temperature can be continuously delivered to the high heat flux density position on the surface of the domain controller (such as above the SoC package, power circuit). (Near the sensing point), weakening the local temperature rise deviation caused by the surface stagnant boundary layer, thus improving the reproducibility of the aging temperature profile in that local area; through comparative aging operation of the same model domain controller sample in both locked and unlocked air blowing head states, the deviation of the hot spot temperature from the average temperature inside the chamber can be reduced from +3℃~+12℃ when unguided to within the range of +0.5℃~+2.5℃ (depending on the power consumption level and the selection of H / θ / d), and the angle drift is ≤±1° during more than 96 hours of continuous alternating operation after rigid locking; the air blowing head 42 position adjustment is convenient and highly flexible in use; By setting the air blowing head 42, the local dead zone / laminar flow stagnation area on the surface of the domain controller can be broken, and the flowing air with the same temperature as the ambient temperature can be accurately delivered to the specific high heat flux density location of the device under test (such as above the SoC package or near the power inductor). This prevents the local area from being masked by the phenomenon of uniform space temperature but hot surface microenvironment, thus improving the test accuracy to a certain extent.

[0024] To facilitate fixing the annular sleeve 39; as... Figure 7 , Figure 8 As shown, the fixing part includes a pressing column 40. A short tube penetrating the annular sleeve 39 is provided on the side of the annular sleeve 39. The pressing column 40 is slidably installed inside the short tube. One end of the pressing column 40 extends out of the outside of the short tube, and an annular elastic connecting part 43 is connected to the end sidewall. The annular elastic connecting part 43 is connected to the outer surface of the annular sleeve 39. Based on the force of the annular elastic connecting part 43, the end of the pressing column 40 near the movable block 41 is in close contact with the movable block 41, while the end of the pressing column 40 away from the movable block 41... The end is connected with a pull ring 44; the end face of the extrusion column 40 near the movable block 41 is machined into an arc-shaped concave surface that matches the spherical curvature of the movable block 41. The surface of the arc-shaped concave surface can be covered with a PTFE gasket or a bronze-based wear-resistant layer to reduce stick-slip wear during high and low temperature cycles; under normal conditions, the annular elastic connection part 43 applies a rebound force, so that the arc-shaped concave surface of the extrusion column 40 is in close contact with the spherical surface of the movable block 41, and the annular sleeve 39 is pre-positioned by static friction, so that the annular sleeve will not slip off due to its own weight when the technician adjusts the angle; Among them, the annular elastic connection part 43 can use a spiral spring with a gradually decreasing end diameter as the elastic element, and can be covered with a heat-resistant film on the outside of the spring as needed, or use high and low temperature resistant engineering elastomers such as fluorosilicone rubber (VMQ) / perfluoroether (FFKM) as the elastic material to adapt to the temperature of the working environment; By setting a fixing part, the extrusion column 40 can be pulled to both sides using the pull ring 44. After adjusting the position of the annular sleeve 39, the pull ring 44 is released. Based on the rebound force of the annular elastic connection part 43, the end of the extrusion column 40 is in close contact with the surface of the movable block 41, preventing the annular sleeve 39 from sliding to the outside of the movable block 41, thus achieving the purpose of fixing. Furthermore, in order to prevent the movable block 41 from sliding freely on the outer wall of the support rod 31, anti-slip strips or other structures can be provided on the inner side of the movable block 41 to increase the friction between the movable block 41 and the support rod 31, and prevent the movable block 41 from sliding on the outer wall of the support rod 31 without being subjected to external force.

[0025] To facilitate airflow transport; such as Figure 2 , Figure 4 , Figure 5As shown, the air path structure includes an air outlet pipe 7, one end of which is connected to an air outlet 8, and an air path connector 6 is connected to the other end of the air outlet pipe 7. A first vertical pipe 14 is provided on the test frame 1, and an air outlet 17 is provided on one side of the first vertical pipe 14. A second vertical pipe 15 is provided on the test frame 1, and openings are provided at the top of the first vertical pipe 14 and the second vertical pipe 15. The air path connector 6 is detachably installed in the openings of the first vertical pipe 14 and the second vertical pipe 15. A horizontally arranged horizontal pipe 20 is installed on the second vertical pipe 15, and a connecting pipe 19 is installed on one side of the horizontal pipe 20. A connector 26 is provided at the end of the connecting pipe 19. An insertion port adapted to the connector 26 is provided on the ventilation seat 28, and the connector 26 is detachably installed in the insertion port. By setting up the air path structure, the airflow output from the air outlet 8 can be delivered more efficiently to a position closer to the domain controller 33 through the first riser 14 and the second riser 15.

[0026] For ease of power supply and signal transmission; such as Figure 1 , Figure 3 , Figure 5 , Figure 9 As shown, the main body 30 of the carrier is equipped with an interface conversion board, which is detachably electrically connected to the domain controller 33 via a connecting cable; the movable frame 23 is equipped with a connector that connects to the interface conversion board of the main body 30; the test frame 1 is equipped with a power supply and distribution system 2, and the connector of the movable frame 23 is connected to the power supply and distribution system 2; the aging chamber 4 is equipped with a host computer system 5 on its side, and the power supply and distribution system 2 of the test frame 1 is connected to the host computer system 5 during testing; the aging chamber 4 is equipped with a power socket for the power supply and distribution system 2 to be electrically connected, and the power supply and distribution system 2 is connected to an external power supply system through the power socket; the test frame 1 is also equipped with a load module for testing.

[0027] To ensure a more reliable electrical connection between the interface conversion plate of the movable frame 23 and the vehicle body 30; such as Figure 6 As shown, a first positioning post 32 is fixed on the carrier frame 18, and first positioning frames 37 are provided on both sides of the carrier body 30. When the carrier body 30 is placed on the carrier frame 18, the first positioning post 32 is inserted into the first positioning frame 37. A guide rod 22 is fixed on the carrier frame 18, and the movable frame 23 slides on the outer wall of the guide rod 22. The movable frame 23 and the carrier frame 18 are connected by a support spring 21. A stand 29 is fixed on the carrier frame 18. The stand 29 passes through the movable frame 23 and is rotatably mounted with an arc-shaped pressure frame 24 through an installation shaft. An operating handle 25 is fixed at one end of the arc-shaped pressure frame 24. A clamping frame 34 is fixed on the movable frame 23. The clamping frame 34 is located on the movement trajectory of the operating handle 25. When the operating handle 25 rotates based on the installation shaft and is clamped into the clamping frame 34, the movable frame 23 is pressed downward by the arc-shaped pressure frame 24, and the connector of the movable frame 23 is electrically connected to the interface conversion plate of the carrier body 30.

[0028] For better fixed domain controller 33; such as Figure 5 , Figure 6 , Figure 7 As shown, a second positioning frame 36 is installed on the main body 30 of the vehicle. A second positioning post 38 adapted to the connector 26 is provided at the bottom of the movable frame 23. A pressure plate 35 is provided on the movable frame 23. When the arc-shaped pressure frame 24 presses the movable frame 23 downward into place, the second positioning post 38 is inserted into the second positioning frame 36, and the pressure plate 35 is pressed against the top of the domain controller 33.

[0029] For ease of use of the fixed domain controller 33; such as Figure 9 As shown, a column 46 is fixed to the inner side of the vehicle body 30, and a clamping frame 47 is slidably connected to the outer wall of the column 46. The clamping frame 47 and the vehicle body 30 are connected by a clamping spring 45. By setting up structures such as the clamping frame 47, the domain controller 33 can be auxiliaryly fixed when it is installed in the receiving cavity of the carrier body 30.

[0030] In this embodiment: The airflow output from the outlet 8 of the temperature control system 3 is the forced circulating air inside the aging chamber 4. This airflow passes through the outlet pipe 7 → air path connector 6 → first / second riser pipe 14 / 15 → horizontal pipe 20 → connecting pipe 19 → ventilation seat 28 → blowing pipe 27 to reach the blowing head 42. No additional heating or cooling devices are installed in the entire air path. Therefore, the stagnation temperature of the airflow ejected from the blowing head 42 is consistent with the current ambient temperature of the aging chamber (steady-state deviation does not exceed ±1.5℃). The function of the blowing head 42 is not to create a second temperature zone, but to give the airflow local directionality and near-field velocity under the premise of the same temperature as the environment, so as to penetrate the stagnation boundary layer above the high heat flux density area on the surface of the domain controller 33.

[0031] To achieve the above effects without introducing uncontrollable disturbances, the nozzle of the blowing head 42 in this embodiment is designed as a circular throat with a throat diameter d = 8mm to 12mm (typically d ≈ 10mm), and the inner diameter of the blowing pipe 27 is 10mm to 16mm. Under the rated operating conditions of the circulating fan of the temperature control system 3, the average airflow velocity reaching the outlet of the blowing head 42 is v = 0.8m / s to 2.5m / s (corresponding to a volumetric flow rate of approximately 8L / min to 20L / min per blowing head). This velocity window has been verified by CFD simulation and physical comparison. It can effectively disturb the surface stagnant layer to make the local temperature converge to the ambient temperature, without causing airflow shear damage or unacceptable local cold / hot shock to small surface mount components such as 0402 / 0201.

[0032] The distance H between the nozzle end face and the area to be measured on the surface (hot spot) is 30mm to 60mm (typical value is about 40mm); the angle θ between the nozzle axis and the surface normal is 25° to 60° (typical value is about 30° to 45°) to avoid the airflow reflection stagnation effect and excessive local heat transfer caused by vertical front blowing; When there are multiple distributed hotspots (such as SoC area + power inductor area) in the same domain controller, multiple air blowing heads 42 are independently aligned according to the above criteria. The flow rate of each air blowing head 42 is naturally distributed by the proportion of the flow path cross section in the air path structure, or the single-point flow weight can be adjusted by replacing air blowing heads 42 with different throat diameters.

[0033] Example 2: A domain controller high and low temperature aging test device, such as Figures 1-9 As shown, this embodiment makes the following improvements based on embodiment 1: The bottom of the aging chamber 4 is provided with a protrusion 13, the top surface of the protrusion 13 is arc-shaped, and a lifting control part for controlling the lifting and lowering of the protrusion 13 is provided on one side of the aging chamber 4. A roller 12 is installed at the bottom of the test frame 1. After the protrusion 13 rises, the outer walls of two adjacent protrusions 13 are tangent to the annular outer wall of the roller 12, thereby limiting and fixing the roller 12.

[0034] like Figure 3 As shown, the lifting control unit includes a hydraulic cylinder 10, which is fixed to the side of the aging chamber 4. The output end of the hydraulic cylinder 10 is fixed with a lifting frame 11, and the protrusion 13 is fixed on the lifting frame 11. The bottom of the test frame 1 has a strip-shaped opening, and the side of the strip-shaped opening near the protrusion 13 has an arc-shaped structure that matches the protrusion 13. When the protrusion 13 moves to the highest point within its stroke, it achieves the limiting and fixing of the roller 12 and the sealing of the strip-shaped opening. The aging chamber 4 is equipped with support legs at the bottom to elevate it and provide space for the convex strip 13 to move. The entrance of the aging chamber 4 is equipped with a guide ramp to facilitate the entry and exit of the test rack 1. During the entry of the test rack 1, the height of the convex strip 13 is reduced to avoid obstructing the movement of the roller 12. At the same time, the height of the top of the convex strip 13 is as flush as possible with the height of the top of the opening to prevent the roller 12 from getting stuck in the opening during movement. After the test rack 1 is moved into place, the roller 12 is then limited and fixed based on the convex strip 13. In addition, when it is necessary to clean the inside of the aging chamber 4, the height of the protrusion 13 can be reduced so that the inside of the aging chamber 4 is connected to the outside through the opening. The airflow output by the temperature control system 3 can blow away any dust and impurities that may exist in the aging chamber 4. Since the top surface of the protrusion 13 is an arc structure, it can better guide the impurities out.

[0035] To enhance internal airflow circulation; such as Figure 2 As shown, a circulation chamber is provided on the side of the aging chamber 4. Multiple U-shaped pipes 9 are installed in the circulation chamber, and fans are installed in the U-shaped pipes 9. The two ends of the U-shaped pipes 9 are connected to the interior of the aging chamber 4.

[0036] Example 3: A domain controller high and low temperature aging test equipment. To ensure that the above-mentioned air blowing head does not drift in angle during the alternating aging cycle of -40℃ to +85℃ for several days, the fixing part, in addition to the elastic pre-tightening friction pre-positioning, can also be equipped with a manually operable rigid locking substructure (set screw type or clamp type), so that the position of the annular sleeve relative to the moving block is rigidly locked after adjustment; at the same time, the nozzle geometry, spray distance H and spray angle θ of the air blowing head fall within the feasible empirical window, ensuring that the airflow can effectively penetrate the surface stagnation boundary layer without causing local cold / hot stress concentration.

[0037] For the parts not disclosed in detail in this invention, such as necessary control modules, specific control methods, signal transmission methods, power supply methods, etc., those skilled in the art can ensure the smooth implementation of the solution of this invention based on common sense, normal thinking logic and existing technology.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high and low temperature aging test device for a domain controller, characterized in that, The test rack (1), aging chamber (4) and carrier assembly (16) are included. The aging chamber (4) is equipped with a temperature control system (3). The test rack (1) is equipped with a carrier frame (18) for supporting the carrier assembly (16). The carrier frame (18) is equipped with a movable frame (23) that cooperates with the carrier assembly (16). The carrier assembly (16) includes a carrier body (30). The carrier body (30) is provided with a cavity for accommodating the domain controller (33). The temperature control system (3) has multiple air outlets (8) at its bottom. The air outlets (8) are connected to a vent seat (28) through an air passage structure. The vent seat (28) is fixed on a movable frame (23). Multiple support rods (31) are fixed on the movable frame (23). Movable blocks (41) are movably installed on the outside of the support rods (31). An annular sleeve (39) is movably installed on the outside of the movable blocks (41). The movable blocks (41) have a spherical structure. The annular sleeve (39) is close to the movable blocks (41). 1) The annular wall is a spherical structure that fits the movable block (41). The top of the annular sleeve (39) is connected to an air blowing pipe (27). One end of the air blowing pipe (27) is connected to the air vent (28). The bottom of the annular sleeve (39) is provided with an air blowing head (42). A cavity is provided inside the annular sleeve (39). The air blowing head (42) is connected to the air blowing pipe (27) through the cavity. The side of the annular sleeve (39) is provided with a fixing part for fixing the annular sleeve (39) to the movable block (41). The air supply air of the blowing head (42) is taken from the circulating air in the aging chamber (4) and regulated by the temperature control system (3). The angle θ between the central axis of the nozzle of the blowing head (42) and the normal of the area to be measured on the upper surface of the domain controller (33) satisfies 15°≤θ≤75°. The distance H between the nozzle end face of the blowing head (42) and the area to be measured on the surface of the domain controller (33) satisfies 20mm≤H≤80mm.

2. The domain controller high and low temperature aging test equipment according to claim 1, characterized in that, The fixing part includes a squeezing column (40). A short tube is provided on the side of the annular sleeve (39) that penetrates the annular sleeve (39). The squeezing column (40) is slidably installed inside the short tube. One end of the squeezing column (40) extends out of the outside of the short tube, and the end side wall is connected to an annular elastic connecting part (43). The annular elastic connecting part (43) is connected to the outer surface of the annular sleeve (39). Based on the force of the annular elastic connecting part (43), the end of the squeezing column (40) close to the movable block (41) is in close contact with the movable block (41). Based on the friction, the annular sleeve (39) is fixed.

3. The domain controller high and low temperature aging test equipment according to claim 1, characterized in that, The air passage structure includes an air outlet pipe (7), one end of which is connected to an air outlet (8), and one end of which is connected to an air passage connector (6). The test frame (1) is provided with a first vertical pipe (14), and an air outlet (17) is provided on one side of the first vertical pipe (14). The test frame (1) is provided with a second vertical pipe (15), and the top of the first vertical pipe (14) and the second vertical pipe (15) are provided with openings. The air passage connector (6) is detachably installed in the openings of the first vertical pipe (14) and the second vertical pipe (15). A horizontally arranged horizontal pipe (20) is installed on the second vertical pipe (15), and a connecting pipe (19) is installed on one side of the horizontal pipe (20). A connector (26) is provided at the end of the connecting pipe (19). A socket adapted to the connector (26) is provided on the ventilation seat (28), and the connector (26) is detachably installed in the socket.

4. The domain controller high and low temperature aging test equipment according to claim 3, characterized in that, An interface conversion board is provided on the main body (30) of the vehicle. The interface conversion board is detachably electrically connected to the domain controller (33) via a connecting cable. A connector is provided on the movable frame (23) to connect to the interface conversion board of the main body (30). A power supply and distribution system (2) is provided on the test frame (1). The connector of the movable frame (23) is connected to the power supply and distribution system (2). A host computer system (5) is provided on the side of the aging chamber (4). During testing, the power supply and distribution system (2) of the test frame (1) is connected to the host computer system (5) via a signal. A power socket for the power supply and distribution system (2) is provided in the aging chamber (4). The power supply and distribution system (2) is connected to the external power supply system via the power socket.

5. The domain controller high and low temperature aging test equipment according to claim 4, characterized in that, A first positioning post (32) is fixed on the carrier frame (18), and first positioning frames (37) are provided on both sides of the carrier body (30). When the carrier body (30) is placed on the carrier frame (18), the first positioning post (32) is inserted into the first positioning frame (37). A guide rod (22) is fixed on the carrier frame (18), and the movable frame (23) slides along the outer wall of the guide rod (22). The movable frame (23) and the carrier frame (18) are connected by a support spring (21). A vertical frame (29) is fixed on the carrier frame (18). 29) An arc-shaped pressure frame (24) is rotatably mounted on the movable frame (23) via the mounting shaft. An operating handle (25) is fixed at one end of the arc-shaped pressure frame (24). A card holder (34) is fixed on the movable frame (23). The card holder (34) is located on the movement trajectory of the operating handle (25). When the operating handle (25) rotates based on the mounting shaft and is engaged in the card holder (34), the movable frame (23) is pressed downward by the arc-shaped pressure frame (24) and the connector of the movable frame (23) is electrically connected to the interface conversion plate of the carrier body (30).

6. The domain controller high and low temperature aging test equipment according to claim 5, characterized in that, The vehicle body (30) is equipped with a second positioning frame (36), and the bottom of the movable frame (23) is provided with a second positioning post (38) that is compatible with the connector (26). The movable frame (23) is provided with a pressure plate (35). When the arc-shaped pressure frame (24) presses the movable frame (23) downward into place, the second positioning post (38) is inserted into the second positioning frame (36), and the pressure plate (35) is pressed against the top of the domain controller (33).

7. The domain controller high and low temperature aging test equipment according to claim 1, characterized in that, A column (46) is fixed inside the vehicle body (30), and a clamping frame (47) is slidably connected to the outer wall of the column (46). The clamping frame (47) and the vehicle body (30) are connected by a clamping spring (45).

8. A domain controller high and low temperature aging test device according to any one of claims 1-7, characterized in that, The bottom of the aging chamber (4) is provided with a protrusion (13), the top surface of the protrusion (13) is arc-shaped, and a lifting control part for controlling the lifting of the protrusion (13) is provided on one side of the aging chamber (4). A roller (12) is installed at the bottom of the test frame (1). After the protrusion (13) rises, the outer walls of two adjacent protrusions (13) are tangent to the annular outer wall of the roller (12), thereby limiting and fixing the roller (12).

9. The domain controller high and low temperature aging test equipment according to claim 8, characterized in that, The lifting control unit includes a hydraulic cylinder (10), which is fixed to the side of the aging chamber (4). The output end of the hydraulic cylinder (10) is fixed with a lifting frame (11), and the protrusion (13) is fixed on the lifting frame (11). The bottom of the test frame (1) has a strip-shaped opening. The side of the strip-shaped opening close to the protrusion (13) has an arc-shaped structure that matches the protrusion (13). When the protrusion (13) moves to the highest point within its stroke, it achieves the limiting and fixing of the roller (12) and the sealing of the strip-shaped opening.

10. The domain controller high and low temperature aging test equipment according to claim 1, characterized in that, The aging chamber (4) has a circulation chamber on its side, and multiple U-shaped pipes (9) are installed in the circulation chamber. Fans are installed in the U-shaped pipes (9), and both ends of the U-shaped pipes (9) are connected to the interior of the aging chamber (4).

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