An automatic EOL detection system of intelligent power distribution box

Abstract

The application provides an automatic EOL detection system of an intelligent power distribution box, comprising: a detection module, the detection module comprising: a detection unit and an electronic load, the detection unit being connected to the intelligent power distribution box through a test wiring harness, and the electronic load being connected in series to a load circuit of the intelligent power distribution box; a control module, the control module being connected to the detection module; a pneumatic execution module, the pneumatic execution module being connected to the detection module and the control module; a structure support module, the structure support module comprising: a main control cabinet and a test cabinet, the main control cabinet being used for supporting the detection module and the control module, and the test cabinet being used for supporting the pneumatic execution module, the intelligent power distribution box and a test bench. The application solves the technical problems of traditional detection, such as manual connection of a test wiring harness, operation of a detection instrument, recording of data and determination of results, long time consumption of single product detection and low detection efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field, and more specifically, to an automatic EOL detection system for an intelligent power distribution box. Background Technology

[0002] In the automotive electronics industry, the intelligent power distribution box is a core control component of the automotive electrical system, and its end-of-life (EOL) testing before leaving the factory is a crucial step in ensuring product quality and vehicle driving safety.

[0003] However, the relevant technologies have at least one of the following problems: traditional EOL testing of smart distribution boxes relies on manual connection of test harnesses, operation of testing instruments (such as ordinary multimeters), recording of data and determination of results. Testing of a single product is time-consuming and inefficient. Utility Model Content

[0004] This invention solves the technical problem that traditional testing relies on manual connection of test harnesses, operation of testing instruments, recording of data and determination of results, resulting in long testing time and low testing efficiency for a single product.

[0005] To address the aforementioned problems, this utility model provides an automatic EOL detection system for an intelligent power distribution box, comprising: a detection module, the detection module including: a detection unit and an electronic load, the detection unit being connected to the intelligent power distribution box via a test harness, and the electronic load being connected in series to the load circuit of the intelligent power distribution box; a control module, the control module being connected to the detection module; a pneumatic actuator module, the pneumatic actuator module being connected to the detection module and the control module; and a structural support module, the structural support module including: a main control cabinet and a test cabinet, the main control cabinet supporting the detection module and the control module, and the test cabinet supporting the pneumatic actuator module, the intelligent power distribution box, and the test bench.

[0006] Compared with existing technologies, the technical effects achieved by this solution are as follows: the detection unit is used to detect the open status, current and voltage values ​​of the output channel of the intelligent power distribution box; the electronic load is connected in series with the load circuit of the intelligent power distribution box, and the on / off state and size of the load circuit of the intelligent power distribution box can be adjusted through communication control; the pneumatic actuator module replaces manual clamping, which can avoid the influence of factors such as human operation by traditional quality inspectors; the control module drives the detection module to automatically complete parameter acquisition and judgment, which can shorten the inspection time of a single product, improve inspection efficiency, and adapt to the needs of mass production.

[0007] In one embodiment of this utility model, the control module includes: a main control board, which is connected to the electronic load and integrates a communication signal transceiver unit, a load circuit on / off control unit, an analog signal output unit, and a sensor signal receiving unit; and a computer host, which is connected to the main control board and the detection module and integrates a host computer program.

[0008] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: The main control board integrates multiple signal processing units, realizing bidirectional communication between the computer host and the detection module and pneumatic actuator module, solving the linkage failure problem caused by the "independent components" of the traditional system, shortening the system response time, and improving the continuity of the detection process; The computer host realizes the power on / off control, working status acquisition, sensor data acquisition, and data transmission and reception of each component through communication signals, and the computer host uniformly calculates and transmits and receives logical instructions, realizing the entire system to complete the detection step by step in a fully automatic manner.

[0009] In one embodiment of this utility model, the pneumatic actuator module includes: a pneumatic regulating valve, a pneumatic solenoid valve, a cylinder, a linear motion optical axis, and a linear motion bearing; the pneumatic regulating valve, the pneumatic solenoid valve, and the cylinder are connected by an air pipe; the piston rod of the cylinder is fixedly connected to the lifting part of the test bench; the linear motion optical axis is fixed to the test bench, and the linear motion bearing is sleeved on the linear motion optical axis.

[0010] Compared with existing technologies, the technical effects achieved by this solution are as follows: the pneumatic regulating valve is a pneumatic circuit control component, which can manually adjust the pneumatic circuit pressure and pressure value indication; the pneumatic solenoid valve is a pneumatic circuit control component, which controls the opening and closing of the pneumatic circuit when energized; the cylinder is a pneumatic circuit actuator, which provides the power for lifting and lowering; the linear motion optical axis and the linear motion bearing cooperate to reduce the coaxiality error when the test bench is raised and lowered, avoid poor wire harness contact caused by misalignment, and improve the stability of test data.

[0011] In one embodiment of this utility model, the pneumatic actuator module further includes: a pressure rod, which is installed below the lifting part of the test bench; and a limiting pin, which is fixed to the bearing surface of the test bench.

[0012] Compared with existing technologies, the technical effects achieved by this solution are as follows: the pressure bar keeps the test product stationary during the test; the limit pin cooperates with the positioning hole at the bottom of the smart power distribution box to achieve rapid product positioning, shorten positioning time, and avoid interface damage caused by reverse wiring.

[0013] In one embodiment of this utility model, the automatic EOL detection system further includes a safety protection module, which includes a grating sensor and an emergency stop button. The grating sensor is electrically connected to the sensing signal receiving unit, and the emergency stop button is electrically connected to the emergency control unit of the main control board.

[0014] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the grating sensor forms a "light curtain" covering the lifting range of the test bench to detect whether the operator's arm is blocking the movement. If there is no obstruction, the pneumatic lifting operation can proceed; if there is obstruction, the pneumatic lifting operation will stop. The emergency stop button is connected to the emergency control unit of the main control board and is used to shut down the machine in case of abnormality during the testing process. Pressing the emergency stop button can cut off the power supply to the entire system, realizing "one-click shutdown".

[0015] In one embodiment of this utility model, the number of grating sensors is two; the two grating sensors are respectively installed on both sides of the test cabinet, and the detection area of ​​the two grating sensors covers the lifting stroke range of the test bench.

[0016] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: the two grating sensors adopt a "parallel trigger" logic, and the system will be stopped as soon as either grating sensor detects an obstruction, thus avoiding protection failure caused by the failure of a single grating sensor and improving the system's safety redundancy and safety protection reliability.

[0017] In one embodiment of this utility model, the automatic EOL detection system further includes a human-computer interaction module, which includes a monitoring screen, an input device, and an indicator light. The monitoring screen is connected to the display output terminal of the computer host, the input device is connected to the input port of the computer host, and the control terminal of the indicator light is electrically connected to the output terminal of the main control board.

[0018] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: The monitoring screen is a monitoring and display component for the automatic EOL detection process. It is connected to the computer host and is used to display the detection progress, voltage / current data, fault point prompts, etc. in real time; the input device is connected to the computer host and is used for the start and stop operation of the detection process and information input; the indicator light is used to indicate the working status of the automatic EOL detection system.

[0019] In one embodiment of this utility model, the human-computer interaction module further includes a manual lifting button, which is located on the test bench and is electrically connected to the manual control unit of the main control board.

[0020] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: the manual lifting button is used for system debugging or abnormal recovery without disassembling the air circuit, which can shorten the debugging time and improve the debugging efficiency.

[0021] In one embodiment of this utility model, the detection unit adopts a six-and-a-half-digit electronic multimeter, which employs a high-precision DC voltage / current detection scheme.

[0022] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: the six-and-a-half-digit electronic multimeter is a high-precision current and voltage detection instrument with data communication function, which can detect the opening status, current and voltage values ​​of the output channels of the intelligent power distribution box.

[0023] In one embodiment of this invention, the electronic load adopts a programmable DC electronic load scheme.

[0024] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: the programmable electronic load supports four modes: constant voltage, constant current, constant resistance, and constant power, which can simulate the full operating load of the intelligent power distribution box, improving the load simulation coverage and detection comprehensiveness.

[0025] By adopting the technical solution of this utility model, the following technical effects can be achieved: (1) The automatic EOL detection system of the intelligent power distribution box in this application can automatically detect the functional status, load channel input and output status of automotive electronic products off the production line (full chip intelligent power distribution box), and has the ability to automatically identify whether the product is qualified after being off the production line and output a test report; (2) The new system architecture significantly improves the efficiency of EOL off-line testing. At the same time, the automatic EOL testing system can avoid the influence of factors such as manual operation by traditional quality inspectors, greatly improve the quality and objectivity of product off-line testing, and enhance product quality consistency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the structure of an automatic EOL detection system for an intelligent power distribution box provided in Embodiment 1 of this utility model; Figure 2 for Figure 1 Another structural diagram of the automated EOL detection system in China; Figure 3 for Figure 1Another structural diagram of the automated EOL detection system in China; Figure 4 for Figure 3 A magnified view of region A in the image; Figure 5 for Figure 1 A connection diagram of the automatic EOL detection system.

[0027] Explanation of reference numerals in the attached figures: 1. Main control cabinet; 2. Monitoring screen; 3. Input device; 4. Detection unit; 5. Electronic load; 6. Main control board; 7. Computer host; 8. Indicator light; 9. Test bench; 10. Intelligent power distribution box; 11. Test cabinet; 12. Pneumatic solenoid valve; 13. Pneumatic regulating valve; 14. Cylinder; 15. Linear motion optical axis; 16. Linear motion bearing; 17. Pressure rod; 18. Grating sensor; 19. Limit pin; 20. Manual lifting button; 21. Emergency stop button. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] Example 1 See Figure 1 This utility model provides an automatic EOL detection system for an intelligent power distribution box, combined with Figures 2-4 The automatic EOL detection system includes a detection module, a control module, a pneumatic actuator module, and a structural support module. The detection module includes a detection unit 4 and an electronic load 5. The detection unit 4 is connected to the intelligent power distribution box 10 via a test harness, and the electronic load 5 is connected in series to the load circuit of the intelligent power distribution box 10. The control module is connected to the detection module. The pneumatic actuator module is connected to the detection module and the control module. The structural support module includes a main control cabinet 1 and a test cabinet 11. The main control cabinet 1 is used to support the detection module and the control module, and the test cabinet 11 is used to support the pneumatic actuator module, the intelligent power distribution box 10, and the test bench 9.

[0030] In one specific embodiment, the detection module, control module, and pneumatic actuator module are centrally installed through the main control cabinet 1 and test cabinet 11 of the structural support module, resulting in a small footprint. The main control cabinet 1 serves as the structural support cabinet for each detection module and control module. The test cabinet 11 is the cabinet of the test bench 9, which contains air and electrical connection lines. The electronic load 5 is connected in series with the load circuit of the test product and can adjust the on / off state and size of the load circuit of the intelligent power distribution box 10 through communication control. The test product in this application is the intelligent power distribution box 10. At the same time, the electronic load 5 connected in series with the load circuit of the intelligent power distribution box 10 can simulate the current and voltage load characteristics in actual operation (such as constant current and constant voltage modes), solving the problem of test result distortion caused by the traditional "no-load simulation" and improving the consistency between test data and actual working conditions. The pneumatic actuator module replaces manual clamping, and the control module drives the detection module to automatically complete parameter acquisition and judgment, which can shorten the single-product testing time, improve testing efficiency, and adapt to the needs of mass production.

[0031] Furthermore, the control module includes: a main control board 6 and a computer host 7. The main control board 6 is connected to the electronic load 5 and integrates a communication signal transceiver unit, a load circuit on / off control unit, an analog signal output unit, and a sensor signal receiving unit. The computer host 7 is connected to the main control board 6 and the detection module, and integrates a host computer program.

[0032] Specifically, the main control board 6 and the computer host 7 form a communication control module. The main control board 6 acts as an "intermediate execution hub," integrating multiple signal processing units to achieve bidirectional communication between the computer host 7 and the detection module and pneumatic execution module. This solves the linkage failure problem caused by the "independent components" in traditional systems, shortens the system response time, and improves the continuity of the detection process. Specifically, it receives control commands from the computer host 7 and simultaneously drives and controls the operation of each execution component: opening and switching of the pneumatic solenoid valve 12, power on / off and signal input of the test product, power on / off and signal reception of the grating sensor 18, power on / off of the indicator light 8, and power on / off and circuit switching of the electronic load 5.

[0033] The host computer 7 integrates a host computer program, which is the command center of this automatic EOL detection system. It communicates, receives and controls the detection unit 4, electronic load 5, main control board 6, and test products. At the same time, the host computer program supports preset detection parameters (such as voltage threshold and load mode) for more than 100 product models. Operators only need to select the product model to automatically load parameters, reducing the error rate of parameter setting. The host computer program receives the voltage and current data of the detection unit 4 in real time, automatically performs filtering calculations and threshold comparisons, replacing manual data processing and improving data processing efficiency.

[0034] Further, see Figure 3 and Figure 4The pneumatic actuator module includes: a pneumatic regulating valve 13, a pneumatic solenoid valve 12, a cylinder 14, a linear motion optical axis 15, and a linear motion bearing 16; the pneumatic regulating valve 13, the pneumatic solenoid valve 12, and the cylinder 14 are connected by air pipes; the piston rod of the cylinder 14 is fixedly connected to the lifting part of the test bench 9; the linear motion optical axis 15 is fixed to the test bench 9, and the linear motion bearing 16 is sleeved on the linear motion optical axis 15.

[0035] When manually clamping products, uneven force control can easily lead to product damage, and the clamping time is long and inefficient. At the same time, the test bench 9 is prone to deviation and jamming when it is raised and lowered, resulting in poor contact of the test harness and affecting the test accuracy.

[0036] Specifically, cylinder 14 is a pneumatic actuator that provides the power for lifting and lowering. The cylinder 14 drives the test bench 9 to lift and lower, replacing manual clamping, which shortens clamping time. The clamping pressure is precisely controlled by the pneumatic regulating valve 13, avoiding product damage caused by uneven manual force and reducing the product clamping defect rate. The linear motion optical axis 15 cooperates with the linear motion bearing 16 to reduce coaxiality errors during the lifting and lowering of the test bench 9, avoiding poor wire harness contact caused by misalignment and improving the stability of test data. The pneumatic regulating valve 13 is a pneumatic control component that allows manual adjustment of the pneumatic pressure and pressure value indication, improving the accuracy of pneumatic pressure regulation, stabilizing the lifting and lowering speed of cylinder 14, avoiding delays in the testing process caused by speed fluctuations, and improving the consistency of the testing rhythm. The pneumatic solenoid valve 12 is a pneumatic control component that controls the opening and closing and reversing of the pneumatic circuit when energized.

[0037] Preferably, there are four linear motion optical axes 15 and four linear motion bearings 16.

[0038] Furthermore, the pneumatic actuator module also includes a pressure rod 17 and a limit pin 19. The pressure rod 17 is installed below the lifting part of the test bench 9; the limit pin 19 is fixed to the bearing surface of the test bench 9.

[0039] Specifically, the function of the pressure rod 17 is to keep the test product stationary during the test. At the same time, the pressure rod 17 is made of plastic to avoid bumping and scratching the outer surface of the test product during operation. The limit pin 19 cooperates with the positioning hole at the bottom of the intelligent power distribution box 10 to realize the product positioning quickly, shorten the positioning time, and avoid interface damage caused by reverse insertion of the wire harness.

[0040] Furthermore, the automatic EOL detection system also includes a safety protection module, which includes a grating sensor 18 and an emergency stop button 21. The grating sensor 18 is electrically connected to the sensing signal receiving unit, and the emergency stop button 21 is electrically connected to the emergency control unit of the main control board 6.

[0041] Specifically, the grating sensor 18 forms a "light curtain" covering the lifting range of the test bench 9 to detect whether the operator's arm is obstructing the movement. If there is no obstruction, the pneumatic lifting operation can proceed; if there is obstruction, the pneumatic lifting operation will stop. For example, when an arm is detected obstructing the movement, the main control board 6 immediately cuts off the power to the cylinder 14 and controls the test bench 9 to stop lifting. The emergency stop button 21 is connected to the emergency control unit of the main control board 6 and is used to shut down the machine in case of an abnormal situation during the testing process. Pressing the emergency stop button 21 will cut off the power to the entire system and achieve "one-click shutdown".

[0042] Furthermore, there are two grating sensors 18; the two grating sensors 18 are respectively installed on both sides of the test cabinet 11, and the detection area of ​​the two grating sensors 18 covers the lifting stroke range of the test bench 9.

[0043] Specifically, two grating sensors 18 are respectively located on both sides of the test cabinet 11, and the detection area crosses and covers the lifting stroke of the test bench, with no blind spots. Operators can be detected from any direction when they extend their arms, thus improving the safety protection coverage. The two grating sensors 18 adopt the "parallel trigger" logic. If either grating sensor 18 detects an obstruction, it will trigger a shutdown, avoiding protection failure caused by the failure of a single grating sensor 18, and improving the system's safety redundancy and safety protection reliability.

[0044] Furthermore, the automatic EOL detection system also includes a human-machine interaction module, which includes a monitoring screen 2, an input device 3, and an indicator light 8. The monitoring screen 2 is connected to the display output terminal of the computer host 7, the input device 3 is connected to the input port of the computer host 7, and the control terminal of the indicator light 8 is electrically connected to the output terminal of the main control board 6.

[0045] Specifically, the monitoring screen 2 is a monitoring and display component for the automatic EOL detection process. It is connected to the computer host 7 and is used to display the detection progress, voltage / current data, fault point prompts, etc. in real time. Operators can grasp the detection status without being close to the instrument, improving operational efficiency. The input device 3 includes a keyboard and a mouse. The keyboard / mouse is connected to the computer host 7 and is used for starting and stopping the detection process and inputting information. The indicator light 8 is used to indicate the working status of the automatic EOL detection system. For example, a flashing light indicates that the detection is in progress, a lit light (without flashing) indicates that the detection is completed, and an off light indicates that the machine has stopped or experienced an abnormal power failure, reducing the false judgment rate of status.

[0046] Furthermore, the human-computer interaction module also includes a manual lifting button 20, which is located on the test bench 9 and is electrically connected to the manual control unit of the main control board 6.

[0047] Specifically, the manual lifting button 20 is used for system debugging (such as the lifting function of the test bench 9) or abnormal recovery (such as manual reset after the grating is blocked). It does not require disassembling the air circuit, which can shorten the debugging time and improve the debugging efficiency.

[0048] Preferably, there are two manual lifting buttons 20, and the two manual lifting buttons 20 are connected in series. When both manual lifting buttons 20 are pressed at the same time, the main control board 6 will output a drive command to the pneumatic solenoid valve 12 to realize the manual lifting of the test bench 9, avoid the accidental operation of the bench caused by a single person's accidental touch, reduce the accidental touch rate, and further improve the safety of operation.

[0049] Furthermore, the detection unit 4 uses a six-and-a-half-digit electronic multimeter, which employs a high-precision DC voltage / current detection scheme.

[0050] Specifically, the 6.5-digit electronic multimeter has a DC voltage accuracy of ±0.001%FS and a current accuracy of ±0.002%FS, which is 100 times more accurate than ordinary multimeters. It can accurately capture minute parameter fluctuations in the output channels of the smart distribution box 10, improving the accuracy of the test data. At the same time, the 6.5-digit electronic multimeter has a data communication function to detect the on-state, current and voltage values ​​of the output channels of the smart distribution box 10.

[0051] Furthermore, the electronic load 5 adopts a programmable DC electronic load scheme.

[0052] Specifically, the programmable electronic load supports four modes: constant voltage, constant current, constant resistance, and constant power. It can simulate the full operating load of the intelligent power distribution box 10, improving the load simulation coverage and detection comprehensiveness.

[0053] For a preferred connection principle diagram of the automatic EOL detection system, please refer to [link / reference needed]. Figure 5 The automatic EOL detection system of this application also includes: an AC220V AC power supply system and a DC24V DC power supply system. The AC220V AC power supply system provides power to each connected device in the system. The main control board has an AC-to-DC function, converting it into DC24V for power supply to the downstream components. The DC24V DC power supply system is provided by the main control board and can control the on / off of each circuit through the relay control device built into the main control board.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic EOL detection system for an intelligent power distribution box, characterized in that, The automated EOL detection system includes: The detection module includes a detection unit (4) and an electronic load (5). The detection unit (4) is connected to the smart distribution box (10) via a test harness, and the electronic load (5) is connected in series to the load circuit of the smart distribution box (10). A control module, which is connected to the detection module; A pneumatic actuator module, wherein the pneumatic actuator module is connected to the detection module and the control module; The structural support module includes a main control cabinet (1) and a test cabinet (11). The main control cabinet (1) is used to support the detection module and the control module, and the test cabinet (11) is used to support the pneumatic actuator module, the intelligent power distribution box (10), and the test bench (9).

2. The automatic EOL detection system according to claim 1, characterized in that, The control module includes: The main control board (6) is connected to the electronic load (5), and the main control board (6) integrates a communication signal transceiver unit, a load circuit on / off control unit, an analog signal output unit and a sensor signal receiving unit. Computer host (7), the computer host (7) is connected to the main control board (6) and the detection module, and the computer host (7) integrates the host computer program.

3. The automatic EOL detection system according to claim 1, characterized in that, The pneumatic actuator module includes: a pneumatic regulating valve (13), a pneumatic solenoid valve (12), a cylinder (14), a linear motion optical axis (15), and a linear motion bearing (16); The pneumatic regulating valve (13), the pneumatic solenoid valve (12), and the cylinder (14) are connected by an air pipe; The piston rod of the cylinder (14) and the lifting part of the test stand (9) are fixedly connected; The linear motion optical axis (15) and the test stand (9) are fixed, and the linear motion bearing (16) is sleeved on the linear motion optical axis (15).

4. The automatic EOL detection system according to claim 3, characterized in that, The pneumatic actuator module also includes: A pressure rod (17) is installed below the lifting part of the test bench (9); A limiting pin (19) is fixed to the bearing surface of the test bench (9).

5. The automatic EOL detection system according to claim 2, characterized in that, The automated EOL detection system also includes: The safety protection module includes a grating sensor (18) and an emergency stop button (21), wherein the grating sensor (18) is electrically connected to the sensing signal receiving unit, and the emergency stop button (21) is electrically connected to the emergency control unit of the main control board (6).

6. The automatic EOL detection system according to claim 5, characterized in that, The number of grating sensors (18) is two; The two grating sensors (18) are respectively installed on both sides of the test cabinet (11), and the detection area of ​​the two grating sensors (18) covers the lifting stroke range of the test bench (9).

7. The automatic EOL detection system according to any one of claims 2 or 5, characterized in that, The automated EOL detection system also includes: The human-computer interaction module includes a monitoring screen (2), an input device (3), and an indicator light (8). The monitoring screen (2) is connected to the display output terminal of the computer host (7), the input device (3) is connected to the input port of the computer host (7), and the control terminal of the indicator light (8) is electrically connected to the output terminal of the main control board (6).

8. The automatic EOL detection system according to claim 7, characterized in that, The human-computer interaction module also includes: A manual lifting button (20) is provided on the test bench (9), and the manual lifting button (20) is electrically connected to the manual control unit of the main control board (6).

9. The automatic EOL detection system according to claim 1, characterized in that, The detection unit (4) uses a six-and-a-half-digit electronic multimeter, which employs a high-precision DC voltage / current detection scheme.

10. The automatic EOL detection system according to claim 1, characterized in that, The electronic load (5) adopts a programmable DC electronic load scheme.

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