Smart female socket for heater control board and burn-in test device

Abstract

This invention proposes an intelligent connector and aging test device for a heater control board. The intelligent connector includes: a first relay connecting the control board under test to an external first DC power supply; a second relay connecting the control board under test to an external second DC power supply; a third relay connecting the control board under test to an external regenerative electronic load; a voltage / current detection module connected to the first DC power supply, the second DC power supply, and the regenerative electronic load; and an MCU control module connected to the control board under test, each relay, and the voltage / current detection module. The MCU control module reads the serial number of the control board under test from the control board under test, and determines whether overvoltage, undervoltage, or other faults have occurred based on the data from the voltage / current detection module. Furthermore, in the event of a fault, the MCU control module controls the on / off state of the relays to effectively protect the safety of the control board under test.

Description

Technical Field

[0001] This utility model relates to a testing device, and more particularly to an intelligent female connector for a heater control board and an aging testing device. Background Technology

[0002] Traditional aging test methods for heater control boards, such as Figure 3 As shown, the control board under test (DUT) is directly connected to the circuit. The placement and barcode recording of the DUT require testers to arrange them in a fixed order and manually scan the barcodes, which is very inconvenient. The heating load uses an independent resistive load, which cannot be adjusted in real time. During the aging test, the voltage and current data of DC power supply 1 and DC power supply 2 cannot be monitored in real time. If the DUT experiences overvoltage, undervoltage, or overcurrent faults, the power cannot be automatically shut off, posing a safety hazard and affecting the aging test of all DUTs in the same batch. Furthermore, troubleshooting requires testers to manually verify each DUT individually, which is also very inconvenient.

[0003] Therefore, a safe, automated, and easily inspectable intelligent aging test device has become the trend. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical problem to be solved by this utility model is to provide an intelligent female connector for a heater control board and an aging test device.

[0005] To achieve the above objectives, this utility model provides an intelligent female connector for a heater control board, comprising: The relay module includes a first relay, a second relay, and a third relay; wherein, the first relay connects the control board under test to an external first DC power supply, the second relay connects the control board under test to an external second DC power supply, and the third relay connects the control board under test to an external regenerative electronic load; A voltage / current detection module is connected to the first DC power supply, the second DC power supply and the regenerative electronic load, and is used to detect the voltage and current data of the circuits in which the first DC power supply, the second DC power supply and the regenerative electronic load are located; The MCU control module is connected to the control board under test, the relay module, and the voltage / current detection module. The MCU control module is used to read the serial number of the control board under test from the control board under test, and to control the opening and closing of the relays in the relay module according to the voltage and current data of the voltage / current detection module.

[0006] Furthermore, the MCU control module controls the connection between the control board under test and the first DC power supply through the first relay, for controlling the product power supply of the control board under test; controls the connection between the control board under test and the second DC power supply through the second relay, for controlling the power supply of the heating circuit of the control board under test; and controls the connection between the control board under test and the regenerative electronic load through the third relay, for controlling the load circuit de-loading of the control board under test.

[0007] Furthermore, when the voltage / current detection module detects that the voltage value of the circuit where the first DC power supply is located is less than a first voltage threshold or greater than a second voltage threshold, the MCU control module controls the first relay to disconnect; wherein, the first voltage threshold is less than the second voltage threshold; The voltage / current detection module detects that the current in the circuit where the feedback electronic load is located is greater than the first current threshold, and the MCU control module controls the third relay to disconnect. The voltage / current detection module detects the current values ​​of the circuits containing the first DC power supply, the second DC power supply, and the regenerative electronic load. When the current value of any of the three circuits is less than the second current threshold or greater than the third current threshold, the MCU control module controls the first relay, the second relay, and the third relay to disconnect simultaneously. The second current threshold is less than the third current threshold.

[0008] Furthermore, the intelligent female connector also includes a temperature detection module connected to the MCU control module; when the temperature detected by the temperature detection module is greater than the temperature threshold, the MCU control module controls all relays of the relay module to disconnect.

[0009] Furthermore, the smart dock also includes an LED indicator module connected to the MCU control module.

[0010] Furthermore, the MCU control module is connected to the control board under test via a CAN bus.

[0011] Furthermore, the MCU control module communicates with an external host computer via a CAN bus.

[0012] This utility model also provides an aging test device for a heater control board, characterized in that it includes a host computer, a first DC power supply, a second DC power supply, a regenerative electronic load, a communication box, and at least one of the above-mentioned smart connectors; wherein the first DC power supply, the second DC power supply, and the regenerative electronic load are respectively connected to the smart connector and the host computer; the host computer is connected to the smart connector through the communication box.

[0013] Furthermore, each of the smart female connectors stores an installation location number, and the host computer determines the location of the smart female connector from the installation location number obtained from the smart female connector.

[0014] The intelligent connector provided by this invention can read the serial number from the control board under test (DUT) via an MCU control module, detect voltage and current data on the lines of the first DC power supply, the second DC power supply, and the regenerative electronic load via a voltage / current detection module, and determine whether overvoltage or undervoltage faults have occurred via the MCU control module. In the event of a fault, it controls the on / off state of the relays to effectively protect the DUT. Furthermore, since each DUT is controlled by a single intelligent connector, a fault in one DUT does not affect the others, allowing the aging test to continue, thus improving the safety and reliability of the aging test. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the intelligent female connector provided in one embodiment of the present utility model;

[0016] Figure 2 This is a schematic block diagram of an aging test device provided in an embodiment of the present invention;

[0017] Figure 3 This is a block diagram illustrating the principle of aging testing in existing technologies. Detailed Implementation

[0018] like Figure 1 As shown, an embodiment of the present invention provides an intelligent female connector for a heater control board, which includes a relay module 11, a voltage / current detection module 12, an MCU control module 13, a temperature detection module 14, and an LED indicator module 15.

[0019] Relay module 11 is connected to MCU control module 13; relay module 11 includes relay 1, relay 2 and relay 3; wherein, relay 1 controls the connection between the control board under test 16 and the external DC power supply 1; relay 2 controls the connection between the control board under test 16 and the external DC power supply 2; relay 3 controls the connection between the control board under test 16 and the external regenerative electronic load; wherein, MCU control module 13 controls the connection between the control board under test 16 and the DC power supply 1 through relay 1 to control the product power supply of the control board under test 16; controls the connection between the control board under test 16 and the DC power supply 2 through relay 2 to control the power supply of the heating circuit of the control board under test 16; controls the connection between the control board under test 16 and the regenerative electronic load through relay 3 to control the load circuit de-loading of the control board under test 16.

[0020] The voltage / current detection module 12 is connected to the MCU control module 13, DC power supply 1, DC power supply 2 and regenerative electronic load.

[0021] The MCU control module 13 collects voltage and current data in real time from the lines of DC power supply 1, DC power supply 2, and the regenerative electronic load through the voltage / current detection module 12. Based on the voltage and current data from the voltage / current detection module 12, the MCU control module 13 controls the opening and closing of the relays in the relay module 11. Specifically, the voltage / current detection module 12 detects the voltage and current data from the lines of DC power supply 1, DC power supply 2, and the regenerative electronic load. The MCU control module 13 determines whether faults such as overvoltage, undervoltage, overcurrent, open circuit, and short circuit have occurred, and actively controls the on / off state of relays 1, 2, and 3 when a fault occurs.

[0022] In addition to connecting to the aforementioned modules, the MCU control module 13 is also connected to the control board under test (DUT) 16. The MCU communicates with the DUT 16 via wired communication, such as CAN communication, and obtains the serial number and real-time operating data of the DUT 16 according to the communication protocol. The communication protocol is not the focus of this application; it can be existing or custom. Prior to the aging test, the serial number of the DUT 16 has been written into its on-chip memory chip via FCT testing.

[0023] The temperature detection module 14 is connected to the MCU control module 13. The MCU control module 13 collects the temperature data of the intelligent female connector body in real time through the temperature detection module 14; the MCU control module 13 can determine whether the circuit board under test has experienced an over-temperature fault based on the temperature data.

[0024] The LED indicator module 15 is connected to the MCU control module 13. The MCU control module 13 provides status indication through the LED indicator module 15; for example, during normal aging tests, the LED indicator module 15 displays a solid green light; when a fault occurs, the LED indicator module 15 displays a flashing red light, which facilitates on-site troubleshooting by test personnel.

[0025] The intelligent connector provided by this utility model can realize fault protection such as overvoltage, undervoltage, overcurrent, overtemperature, open circuit, and short circuit. When the intelligent connector detects a fault, it will actively control the on / off state of relays 1, 2, and 3 to protect the safety of the control board under test 16; it will upload fault information to the host computer; it will flash red LEDs to facilitate on-site troubleshooting by test personnel; and it will record the number of occurrences of each fault such as overvoltage, undervoltage, overcurrent, overtemperature, open circuit, and short circuit, storing the data in the on-chip storage area of ​​the MCU control module. The host computer can read the fault information of the intelligent connector through the communication protocol and perform data analysis to determine the specific fault. Specifically, the protection strategy implementation logic of the intelligent connector is as follows:

[0026] (1) During the aging test, the MCU control module 13 controls relays 1, 2 and 3 to be in the conducting state.

[0027] (2) Overvoltage protection strategy: The voltage / current detection module 12 detects the voltage data of the DC power supply 1 in real time. When the voltage value is too high (greater than the first voltage threshold), the MCU control module 13 controls the relay 1 to disconnect, cut off the low voltage power supply of the control board under test 16, prevent the control board under test 16 from being damaged due to overvoltage, set the overvoltage fault flag, and report to the host computer through CAN communication.

[0028] The overvoltage fault protection is self-recovering. When the product power supply voltage returns to normal, the overvoltage fault flag is cleared, and the MCU control module 13 controls the relay 1 to conduct again, restoring the low-voltage power supply to the control board 16 under test.

[0029] (3) Undervoltage protection strategy: The voltage / current detection module 12 detects the voltage data of the DC power supply 1 in real time. When the voltage value is too low (less than the second voltage threshold, and the second voltage threshold is less than the first voltage threshold), the MCU control module 13 controls the relay 1 to disconnect, cut off the low voltage power supply of the control board under test 16, prevent the control board under test 16 from being damaged due to undervoltage, set the undervoltage fault flag, and report to the host computer through CAN communication.

[0030] The undervoltage fault protection is self-recovering. When the product power supply voltage returns to normal, the undervoltage fault flag is cleared, and the MCU control module 13 controls the relay 1 to conduct again, restoring the low-voltage power supply to the control board under test 16.

[0031] (4) Overcurrent protection strategy: The voltage / current detection module 12 detects the current data of the load circuit in real time. When the current value is too large (greater than the first current threshold), the MCU control module 13 controls the relay 3 to disconnect, cut off the load circuit of the control board under test 16, prevent damage to the control board under test 16 or the feedback electronic load due to overcurrent, set the overcurrent fault flag, and report to the host computer through CAN communication.

[0032] The overcurrent fault protection is not self-recoverable. The MCU control module 13 locks the relay 3 in the open state until the smart socket is reset, at which point the relay 3 can be turned on again.

[0033] (5) Over-temperature protection strategy: The voltage / current detection module 12 detects the temperature data of the intelligent female connector body in real time. When the temperature value is too high, the MCU control module 13 controls the relays 1, 2 and 3 to disconnect at the same time, cut off the low-voltage power supply circuit, heating circuit and load circuit of the control board under test 16, prevent the control board under test 16 from being damaged due to over-temperature, set the over-temperature fault flag, and report to the host computer through CAN communication.

[0034] The over-temperature fault protection is self-recovering. When the temperature value returns to normal, the over-temperature fault flag is cleared, and the MCU control module 13 controls relays 1, 2, and 3 to conduct again, restoring the low-voltage power supply circuit, heating circuit, and load circuit of the control board under test 16, and continuing the aging test.

[0035] (6) Open circuit protection strategy: The voltage / current detection module 12 detects the current data of the low-voltage power supply circuit, heating circuit and load circuit in real time. If the current value of any of the three circuits is too small (less than the second current threshold), the open circuit protection is triggered. When the current value is too small and the open circuit protection is triggered, the MCU control module 13 controls the relays 1, 2 and 3 to disconnect at the same time, cut off the low-voltage power supply circuit, heating circuit and load circuit of the control board under test 16, and prevent damage to the control board under test 16, DC power supply 1, DC power supply 2 and feedback electronic load caused by the open circuit. The open circuit fault flag is set and reported to the host computer through CAN communication.

[0036] The open-circuit fault protection is not self-recoverable. The MCU control module 13 locks relays 1, 2, and 3 in the open state until the smart socket is reset, at which point relays 1, 2, and 3 can be turned on again.

[0037] (7) Short circuit protection strategy: The voltage / current detection module 12 detects the current data of the low-voltage power supply circuit, heating circuit and load circuit in real time. If the current value of any of the three circuits is too large (greater than the third current threshold, where the third current threshold is greater than the second current threshold), short circuit protection is triggered. When the current value is too large and short circuit protection is triggered, the MCU control module 13 controls relays 1, 2 and 3 to disconnect simultaneously, cutting off the low-voltage power supply, heating circuit and load circuit of the control board under test 16, preventing damage to the control board under test 16, DC power supply 1, DC power supply 2 and feedback electronic load due to short circuit, setting the short circuit fault flag, and reporting to the host computer through CAN communication.

[0038] The short-circuit fault protection is not self-recoverable. The MCU control module 13 locks relays 1, 2, and 3 in the open state until the smart socket is reset, at which point relays 1, 2, and 3 can be turned on again.

[0039] This utility model embodiment also provides an aging test device for a heater control board, such as... Figure 2 As shown, it includes a host computer, DC power supply 1, DC power supply 2, a regenerative electronic load, a communication box, and at least one of the above-mentioned smart connectors; wherein, the first DC power supply, the second DC power supply, and the regenerative electronic load are respectively connected to the smart connector and the host computer; the host computer is connected to the smart connector through the communication box.

[0040] The system comprises a host computer connected via wired communication to a programmable DC power supply 1, a DC power supply 2, and a regenerative electronic load. DC power supply 1 is connected to the intelligent connector to provide power to the control board under test (DUT). DC power supply 2 is connected to the intelligent connector to provide power to the heating circuit of the DUT. The regenerative electronic load is connected to the intelligent connector to draw heating current from the DUT and feed the load power back to the grid, reducing energy waste in the testing system. The host computer communicates with the intelligent connector via a communication box. The intelligent connector monitors the voltage and current data on the lines of DC power supply 1, DC power supply 2, and the regenerative electronic load in real time, as well as the temperature data of the intelligent connector itself, and uploads this data to the host computer. The intelligent connector also obtains the serial number information and real-time operating data of the DUT via wired communication and then uploads this data to the host computer.

[0041] The serial number of the control board under test can be identified intelligently in the following way; (1) Before the aging test, the serial number of the control board under test has been written into the on-chip memory chip of the control board under test through FCT test. (2) During this aging test phase, the smart connector and the control board under test obtain the serial number of the control board under test through a wired communication interface, such as CAN communication, according to the communication protocol. (3) When the smart female connector is installed on the test bench, it has a preset fixed position number according to the installation position, and this unique and non-repeating position number is written into the storage area of ​​the smart female connector MCU control module 13. (4) The intelligent female connector binds its own location number and the serial number of the control board under test through another CAN communication interface, and uploads them to the host computer. (5) The host computer can obtain the serial number of the control board under test and the specific location number of the installation, so that the test personnel can know the placement of each control board under test during the aging test. If a fault occurs, the smart connector will simultaneously upload the open circuit fault sign, short circuit fault sign, over-temperature fault sign, over-current fault sign, over-voltage fault sign or under-voltage fault sign information to the host computer. The host computer can quickly locate the faulty smart connector based on the open circuit fault sign, short circuit fault sign, over-temperature fault sign, over-current fault sign, over-voltage fault sign and under-voltage fault sign of each smart connector.

[0042] By intelligently identifying the serial number of the control board under test (DUT), the system can intelligently locate the DUT's position, simplifying the process of placing and inputting the DUT information before aging tests and shortening preparation time. The intelligent female connector in this invention allows multiple DUTs to operate independently. When one DUT experiences faults such as overvoltage, undervoltage, overcurrent, overtemperature, open circuit, or short circuit, the other DUTs remain unaffected and can continue normal aging tests.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the present utility model's technical solution shall still fall within the scope of the present utility model's technical solution.

Claims

1. An intelligent female socket for a heater control board, characterized by, include: The relay module includes a first relay, a second relay, and a third relay; wherein, the first relay connects the control board under test to an external first DC power supply, the second relay connects the control board under test to an external second DC power supply, and the third relay connects the control board under test to an external regenerative electronic load; A voltage / current detection module is connected to the first DC power supply, the second DC power supply and the regenerative electronic load, and is used to detect the voltage and current data of the circuits in which the first DC power supply, the second DC power supply and the regenerative electronic load are located; The MCU control module is connected to the control board under test, the relay module, and the voltage / current detection module. The MCU control module is used to read the serial number of the control board under test from the control board under test, and to control the opening and closing of the relays in the relay module according to the voltage and current data of the voltage / current detection module.

2. The intelligent female socket for a heater control board of claim 1, wherein, The MCU control module controls the connection between the control board under test (DUT) and the first DC power supply via the first relay to control the product power supply of the DUT; controls the connection between the DUT and the second DC power supply via the second relay to control the power supply of the heating circuit of the DUT; and controls the connection between the DUT and the regenerative electronic load via the third relay to control the load circuit de-loading of the DUT.

3. The intelligent female dock for a heater control board of claim 2, wherein, When the voltage / current detection module detects that the voltage value of the circuit where the first DC power supply is located is less than a first voltage threshold or greater than a second voltage threshold, the MCU control module controls the first relay to disconnect; wherein, the first voltage threshold is less than the second voltage threshold; The voltage / current detection module detects that the current in the circuit where the feedback electronic load is located is greater than the first current threshold, and the MCU control module controls the third relay to disconnect. The voltage / current detection module detects the current values ​​of the circuits containing the first DC power supply, the second DC power supply, and the regenerative electronic load. When the current value of any of the three circuits is less than the second current threshold or greater than the third current threshold, the MCU control module controls the first relay, the second relay, and the third relay to disconnect simultaneously. The second current threshold is less than the third current threshold.

4. The intelligent female socket for a heater control board of claim 1, wherein, The intelligent female connector also includes a temperature detection module connected to the MCU control module; when the temperature detected by the temperature detection module is greater than the temperature threshold, the MCU control module controls the first relay, the second relay, and the third relay to disconnect simultaneously.

5. The intelligent female dock for a heater control board of claim 1, wherein, The smart dock also includes an LED indicator module connected to the MCU control module.

6. The intelligent female dock for a heater control board of claim 1, wherein, The MCU control module is connected to the control board under test via a CAN bus.

7. The intelligent female dock for a heater control board of claim 1, wherein, The MCU control module communicates with an external host computer via a CAN bus.

8. An aging test device for a heater control board, characterized by, The device includes a host computer, a first DC power supply, a second DC power supply, a regenerative electronic load, a communication box, and at least one smart female connector according to any one of claims 1 to 7; wherein the first DC power supply, the second DC power supply, and the regenerative electronic load are respectively connected to the smart female connector and the host computer; the host computer is connected to the smart female connector through the communication box.

9. The burn-in test apparatus for a heater control board of claim 8, wherein, Each of the smart docks stores an installation location number. The host computer determines the location and fault alarm status of the smart dock based on the installation location number obtained by the smart dock.

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