CN114814435A - A kind of offline test method and test tool of power distribution module - Google Patents

Abstract

The invention relates to an offline testing method and a testing tool of a power distribution module, and relates to the technical field of hardware input and output testing. Including industrial computer, test control board, fixed head of the product to be tested, and test load box. IPC computer: used to run IPC software; IPC software: responsible for issuing instructions for the overall test process and controlling the work of all peripherals; test control board: responsible for inputting a fixed voltage to the port of the product to be tested; equipment to be tested Fixed head: used to fix and connect the product to be tested; test load box: responsible for carrying the current of the output channel of the product to be tested. The test control method of the present invention includes a test content and logic analysis method, a test process execution method, and a test report dynamic generation method. Through a series of test procedures, the present invention detects the fault of the product and identifies the hardware quality, and generates a fault report. The present invention improves the detection quality, efficiency, reduces labor costs and the like with the characteristics of the whole-process automated testing process.

Description

A kind of offline test method and test tool of power distribution module

technical field

The invention relates to an offline test method and a test tool for a power distribution module, belonging to the technical field of hardware input and output testing, and more particularly to a test device for products with switch input and power output functions such as an automobile power distribution module and the like. testing method.

Background technique

The power distribution module is a control device used in automobiles to distribute on-board power to electrical equipment such as instruments, gateways, air conditioners, and various headlights. Such devices often have switch input, power channel output, etc. And a new type of automotive power distribution module also has the characteristics of software control.

In the production workshop of automotive power distribution modules, there are large quantities of orders and production tasks. Production line employees need to check whether the products produced are qualified one by one, and each product test needs to check dozens of input channels and dozens of output channels, including some special functions of power distribution modules, such as CAN communication, power supply voltage, channel current, etc. In the traditional way of testing, it takes about 20 minutes for one employee to test one device. In total, one employee can only test 24 devices in 8 hours a day. The original production task was too heavy, and functional testing was particularly time-consuming.

Product inspection not only takes too long and is difficult to improve efficiency, but also difficult to ensure inspection quality. An employee needs to have certain basic knowledge to inspect a product. If the employee's knowledge is relatively weak, it may not be able to complete the inspection task. In addition, this product inspection process is very cumbersome, with many steps, and it is difficult for employees to ensure whether the product has inspection omissions.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an offline test method and a test tool for a power distribution module, so as to solve the problem that the offline detection of the power distribution module is time-consuming and prone to omissions.

To achieve the above object, the scheme of the present invention includes:

An offline test tool for a power distribution module of the present invention includes an industrial computer running test software, a test control board for providing input voltage for the product to be tested, and a test load for connecting the output channel of the product to be tested; The industrial computer is communicatively connected to the test control board, and also has a test interface for communicating with the product to be tested; the test load is in one-to-one correspondence with each output channel of the product to be tested, and the resistance value of the test load corresponds to the corresponding output The performance of the channels is matched, so that each output channel reaches the set current size when outputting power to the corresponding test load; the industrial computer runs the test software, and performs the following steps to realize the offline test method:

1) Control each output channel to close, detect the current value of the output channel in the closed state, and determine whether each output channel can be reliably shut down;

2) Control each output channel to open, detect the current value of the open and loaded output channel, and judge whether each output channel is reliable.

The present invention proposes an offline detection tool that can realize full automation for the power distribution module. The detection tool and the test method run in it are that the power output port (output channel) of the power distribution module matches the test resistance. The traditional manual detection method of judging whether the corresponding port is working normally by connecting a small load such as a light bulb to see if the light bulb is lit, etc., the method of the present invention can make the corresponding port have real performance in the test. Power output, and the output power or current should be able to reach the rated value of normal operation, and can be maintained for a certain period of time to determine whether the port output is stable, the detection result is more accurate, and the load capacity of the output channel can be detected.

Further, in step 1), it is judged whether each output channel can be reliably turned off by whether the current value of the output channel in the closed state is smaller than the set minimum value.

At the same time, the invention also adds the detection of the shutdown capability of the power channel of the power distribution module, which can timely find the situation that the shutdown cannot be reliably turned off and there is still a large leakage current after the channel is closed.

Further, in step 2), if a stable and continuous current value can be detected, it is judged that the load is reliable; the current value of the output channel in the open state and the load is in the same test load as the normal output channel of this type obtained in advance. If the difference between the current values below is greater than the set value, the test will not pass.

Through offline calibration, the output current under the test resistance corresponding to different power channels of different types of products is pre-determined.

Further, the test control board is also used to connect the proportional valve channel of the product to be tested, and also includes a test load used for one-to-one connection with the proportional valve channel; the offline test method also includes the test of the proportional valve channel: Detect the current value of the proportional valve channel at different opening degrees and the current value when the proportional valve channel is closed, and compare with the pre-obtained normal proportional valve corresponding opening and closing current values under the corresponding test load, the difference is greater than the set value does not pass the test.

For the proportional valve channel, the offline calibration method is also used to pre-determine different types of proportional valve channels of different models under the corresponding test resistance conditions, at different opening degrees (such as fully open, 75%, 50%, closed, etc.) Corresponding output current, by comparing the current collected by the test and the calibration current, the detection of the proportional valve channel of the product to be tested is realized.

Further, the test control board is also used to connect the input channel of the product to be tested; the offline test method also includes testing the input channel: inputting a level signal to the input channel through the test control board, and reading the corresponding switch value. status to judge whether each input channel is abnormal.

Further, in the process of testing the input channel, first send an instruction to switch all the channels that can be switched to high active mode to high active mode, and then control the test control board to output low level to all high active mode channels, and then sequentially The level of the board interface corresponding to the high-effective mode channel is switched to a high level, and after a delay of the set time, the switch status of all input channels of the product to be tested is read, and all channels in the high-effective mode are compared to see if there is any abnormality.

Further, in the process of testing the input channels, an instruction is also sent to switch all channels that can be switched to active low mode to active low mode, and then the test control board is controlled to output high level to all channels in active low mode, and then sequentially The level of the board interface corresponding to the low-effective mode channel is switched to the low level, and after a delay of the set time, the switch status of all input channels of the product to be tested is read, and all the low-effective mode channels are compared to see if there is any abnormality.

Further, the test control board outputs a high level to the input channel in the high effective mode, if the switch state of the channel is on after the set time, there is no abnormality; the test control board outputs a low level to the input channel in the high effective mode, If the digital state of the channel is off after the set time, there is no abnormality; the test control board outputs a low level to the input channel in the low-effective mode, and if the digital state of the channel is on after the set time, there is no abnormality; test The control board outputs a high level to the input channel in the active low mode. If the switch state of the channel is OFF after the set time, there is no abnormality.

By gradually opening, the input level of the high-effective and low-effective input channels is switched one by one, and the detection of the input channel is realized by detecting the corresponding switching value of the input channel that has switched the input level and the input channel that has not been switched.

Further, the test control board is connected to the high-level or low-level output of the port of the corresponding channel through relay switching; the industrial computer is connected to the test control board through serial communication, and the test interface is a CAN interface.

Further, it includes the offline testing method in the offline testing tool of the automotive power distribution module as described above.

The scheme of the present invention also has the following beneficial effects:

1. The industrial computer software of the present invention has simple operation and simple testing process;

2. The test scheme of the present invention is a completely program-controlled test scheme, and the detection data is highly reliable and not easy to be faked;

3. The fault information of the test report of the present invention is highly pertinent to hardware problems, and the reported problems directly correspond to the pin channel information. When troubleshooting hardware problems, it can be done in one step according to the report;

4. The detection efficiency of the present invention is high. Taking a power distribution module with 46 output channels and 58 input channels as an example, it only takes 2 to 3 minutes to complete the detection;

5. The report of the present invention is simple and easy to understand in the form of HTML, which can be opened by an ordinary computer, and has a small size for electronic archives and hardly occupies storage space.

Description of drawings

Fig. 1 is the circuit principle schematic diagram of the power distribution module offline test tool of the present invention;

2 is a schematic diagram of the connection principle of the power distribution module offline test tool of the present invention;

3 is a schematic diagram of the circuit principle of the test control board of the power distribution module offline test tool of the present invention;

FIG. 4 is a schematic diagram of the crimping pins of the product to be tested of the power distribution module offline test tool of the present invention fixed head and head board;

Figure 5 is a schematic diagram of the connection port of the power distribution module product to be tested (corresponding to the crimping pins of the head board shown in Figure 4);

6 is a schematic diagram of the circuit principle of the power distribution module offline test tool load box of the present invention;

Fig. 7 is the flow chart of test content and logic analysis method of the present invention;

Fig. 8 is the flow chart of the test process execution method of the present invention;

FIG. 9 is a flow chart of a method for dynamically generating a test report of the present invention.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings.

Tool example:

As shown in Figure 1, an offline test tool for an automobile power distribution module with a configurable test mode includes an industrial computer computer running the industrial computer software, a test control board, a fixed head of the product to be tested, a test load box, a communication Tool KvaserCAN, communication tool USB-RS485.

IPC computer: used to run IPC software, it needs to have at least two USB communication interfaces, which can be connected to communication tools and send and receive commands. If the mouse and keyboard need additional USB ports. Ordinary Windows computer, Windows 7 or later system, the number of operating systems is not required, you need to install .Net Framework 4.x version framework, install Kvaser CAN and USB-485 drivers.

Industrial computer software: It has the functions of step analysis of testing, process control, and report generation. Responsible for the analysis of test content and logic, the execution of test steps and the issuance of commands, the generation and archiving of test reports, and the ability to control the work of all peripherals, requiring a specific industrial computer and its operating environment.

Test control board: As shown in Figure 3, it is responsible for inputting a fixed voltage to the port of the product to be tested, which can provide voltage values of 0V and 24V. The working principle is to control the relay. The board controls the RS485 communication and is controlled by the software of the industrial computer.

Product to be tested fixed head: used to place and fix the product to be tested. A typical distribution of the connection ports on the plane where the connection ports of the automotive power distribution module are located is shown in Figure 5, including the power input port CON1, the communication port CON2, and the six functional ports CON3 to CON8. The crimping surface of the fixed machine head panel is shown in Figure 4. The crimping surface is distributed with crimping probes of the test ports, and the crimping probes of each test port correspond to the connection ports of the automobile power distribution module one by one. The head board shown in FIG. 4 has a test port arrangement that matches the product port shown in FIG. 5 , the power port 31 corresponds to the power input port CON1, the communication port 32 corresponds to the communication port CON2, and the output test port 37, 33, 36, 34, 38, 32 correspond to the six functional ports CON3 to CON8 one by one. Of course, the distribution of the connection ports of the power distribution module as the product to be tested will also be different from other forms shown in Figure 5, so the crimping surface of the fixed head panel should also be changed accordingly. In short, the principle is the test of the fixed head panel The port is used to connect to the connection port of the power distribution module to be tested correspondingly when pressing. There is a limit card slot on the fixed machine head table top, first fix the bottom, and then press the machine head to complete the wiring. The power of the machine head is pneumatic, and its lifting control is a solenoid valve. The solenoid valve signal comes from the test control board. When the industrial computer software is issued After the lift command, the test control board will respond accordingly, and the solenoid valve receives the signal to open the lift valve and execute the action.

Test load box: a test resistor is set in it, which is used as the test load of each output channel of the product to be tested. One end of the test resistor is connected to the power ground, and the other end is connected to the test port of the fixed head of the product to be tested through the connector, which corresponds to the power output channel in the connection port of the product to be tested.

Specifically, the fixed head panel 3 is pressed down to fix the product to be tested 5 on the fixed position on the base 69, and the connection port of the product to be tested 5 is connected to the load through the crimping pin of the test port on the fixed head panel 3. test load in the box. As shown in Figure 6, the load box provides test resistances for the pins corresponding to the output power in the functional ports CON3~CON8, and the other end of the load box is grounded (the test control board provides grounding on-off control, that is, the control connection GND CTRL). For the power output channel of the product to be tested, the resistance value of the test resistor matches the output power of the channel. For example, for the product to be tested on a 24-volt platform, the output current of a certain output channel ranges from 3.8 to 4.2 amps, then it can be The channel matches the test resistance of 6 ohms, and when the channel is turned on, it can ensure that the channel outputs a current of about 4 amps, so as to realize the actual power output during the test process, and ensure the true and reliable test results. For the proportional valve type output channel, the load box is matched with a test resistor with an appropriate resistance value. During the test, the load capacity of the proportional valve type output channel can be judged by detecting the current. For example, pre-calibrate the appropriate resistance value to test the output current of the proportional valve type output channel under the normal state, and then compare whether the measured proportional valve type output channel can reach the calibrated output current during the test.

Communication tool Kvaser CAN: responsible for data communication between the product to be tested and the industrial computer.

Communication tool USB-RS485: used to transmit the instructions issued by the industrial computer software to the test control board.

The specific connection relationship is shown in Figure 2. The industrial computer 1 communicates with the test control board 2 through USB-RS485, and also communicates with the CAN of the product to be tested 5 through the crimping pin header of the fixed head 3 based on the Kvaser CAN bus protocol. Communication interface (communication port CON2). The power supply input port (power input port CON1) of the product under test 5 is connected through the fixed head 3 to provide a test power supply for testing the power distribution module. The test control board 2 is also connected to the input channel of the product under test through the fixed head 3 (The corresponding control input pins in the functional ports CON3 to CON8), provide the level voltage of the analog switch for testing.

The power distribution module offline test tool of the present invention can realize the following power distribution module offline test method. The method includes three parts: test content and logic analysis, execution of test process, and dynamic generation of test report. The test content and logic analysis are shown in Figure 7, including the following steps:

S1. The IPC software reads the test logic file;

S2. IPC software analyzes and loads global information, including product name/model, number of output channels, number of input channels, number of CAN channels, number of terminal temperature detection points, fixed head control channel number of the product to be tested, communication control commands and Response ID, wake-up relay configuration table, load common grounding switch;

S3. The industrial computer software analyzes and loads the wake-up test report information, including whether the step test is enabled, the wake-up state and the non-wake-up state report display name;

S4, the industrial computer software analyzes and loads the CAN test information, including whether to test each CAN channel described in S2, the name of the CAN H pin, and the name of the CAN L pin;

S5. The IPC software analyzes and loads the power supply test information, including whether the power supply item is tested, as well as the name of the power supply pin, the name of the power ground pin, and the voltage range value;

S6, the IPC software analyzes and loads the output channel test information, including the name of each output channel described in S2, the channel type, the standard current of the channel, the name of the test type, the name of the test item corresponding to each test type, The range of data indicators (maximum and minimum values) corresponding to each test item, and whether channel testing is enabled, whether each supported test type is enabled, and whether each test item is enabled;

S7, the industrial computer software analyzes and loads the input channel test information, including the pin name, pin type name, test type name, test data item name of each input channel described in S2, and whether the channel test is enabled, multi-function Enter whether each item of the channel type is enabled, whether the test type of each channel function type is enabled, whether the test item of each test type is enabled, the channel number, channel name, and channel control relay number for each channel;

S8, the IPC software analyzes and loads the test information of the temperature detection point of the terminal, including the channel name of each temperature detection point of the terminal described in S2, and whether the current temperature is detected;

S9, the industrial computer software analyzes and loads the historical fault DTC record test information, including the header information name of the historical DTC fault record table, and whether the test is performed at the current step. The current process ends.

The test process execution method is shown in Figure 8, including the following steps:

S1. The industrial computer software first determines whether the test content and logic analysis are completed. If it is not completed, the test logic file needs to be selected first, imported into the industrial computer software, and the test content and logic analysis are completed;

S2. The industrial computer software first checks the current product information to be tested, such as required items, serial number format, etc.;

S3. According to the test content and logic analysis, the software of the industrial computer needs to perform the wake-up test and execute the current test step, otherwise skip the current step. The current test step is to wake up each wake-up channel independently one by one, and check whether each additional wake-up output pin follows the wake-up state change. The test process will record the corresponding data into the test report;

S4. The IPC software sends the EOL mode command to make the product to be tested enter the test mode. If it enters normally, proceed to the next step, otherwise exit the test immediately and report that a serious failure has occurred resulting in abnormal communication and the test cannot be completed.

S5. According to the test content and logic analysis, the IPC software needs to test multiple CAN channels, then execute the current step, otherwise skip the current step. The current test step sends and receives commands to each CAN channel, and records the normal information into the test report;

S6, the industrial computer software reads the software version number, enters the version number information into the test report, and indicates the software version of the lower computer used for the current test;

S7. The IPC software reads the hardware version number, and writes the hardware version number as needed. If there is no hardware version number on the production line, the hardware information will be entered, and then it will follow the product for life;

S8. The industrial computer software reads the product serial number, and writes the product serial number as needed. If there is no product serial number on the production line, the information will be entered. If the factory product is maintained later, this serial number will also be used;

S9. According to the test content and logic analysis, the IPC software needs to test the power supply voltage, and executes the current step; otherwise, skips the current step and executes. The current test step will read the power supply voltage value and enter the power supply voltage value into the test report;

S10. According to the test content and logic analysis, the IPC software needs to test the output channel, and executes the current step; otherwise, skips the execution of the current step. All test items in the current test are based on the test content and logical analysis to determine whether each test needs to be carried out. The following complete steps are: send a test command, and perform switch detection for each channel. For high-side output and low-side output channels, the current value of the off state, the current value of the chip junction temperature and the open state, the chip junction temperature, and the channel set whether the non-current channel does not match the current state will be obtained. For proportional valve channels, the current values for opening and closing are obtained. It also supports mixed-type testing of proportional valve channels and high-side output channels. The above data are entered into the test report in each step;

Specifically, the load box matches each power output channel with a test resistance that can make it reach the rated output. When each channel is turned off, it is determined whether the corresponding channel can be reliably turned off by detecting whether there is an output current. In the off state, the output is zero ( If the output current is less than the set minimum value, the output can be considered as zero), then the channel passes the shutdown test; when each channel is turned on, a current of the set size is generated on the matching test resistance, so that the channel reaches the actual power output, and the test If the channel can actually output power and the output power (output current value) reaches the set size, the channel passes the open test; for the proportional valve channel, match the test resistor with the set resistance value, and match the same type of proportional valve channel For the same test resistance, obtain the current values of the proportional valve channel in the closed state and open state during the test to see whether the channel can output power and whether it meets the driving requirements of the proportional valve; you can also pre-calibrate the qualified proportional valve before connecting the corresponding test resistance. When the qualified current value of the open state and the closed state, the collected test current value is compared with the qualified current value of the same type of proportional valve channel during the test. Passed the test;

S11. According to the test content and logic analysis, the IPC software needs to test the input channel, then execute the current step, otherwise skip the current step. All test items in the current test are based on the test content and logical analysis to determine whether each test needs to be carried out. The following complete steps are: send a test command, switch all the channels that can be switched to active high to active high mode (active high), and send commands to switch the relay corresponding to the test control board to low level, and then take turns to switch The relay corresponding to each high-effective channel switches to high level, and keeps all other channels at low level, delays 800ms to read all switch states of the product to be tested, compares all channels for abnormality, and converts the data to Enter the test report. In the same way, switch all channels that can be switched to active low to active low state, and send instructions to switch all the relays corresponding to the test control board to low state, and switch the relays corresponding to each active low channel to low state in turn. Level, step details are the same as active high.

S12. According to the test content and logic analysis, the IPC software needs to test the temperature of the terminal, then execute the current step, otherwise skip the current step. The IPC software reads the temperature values of all channels and records the test report;

S13. According to the test content and logic analysis, the IPC software needs to detect the historical DTC fault information, and executes the current step, otherwise skips the current step and executes. The IPC software reads the historical DTC fault information and records all the information into the test report. The current process ends.

The dynamic generation method of the test report is shown in Figure 9, including the following steps:

S1. After the test is completed and all data are entered into the test report, the industrial computer software executes the test report generation method; if the test report storage path exists, specify the test report path as the storage path, if not, specify the "report" under the system document ” directory is the storage path;

S2. Generate a test report information bar table according to the test report template, including the product serial number, software and hardware version number, test date, test time, test operator, and test result. The test result completes the data backfilling through the following steps;

S3. Generate a wake-up test report form according to the test report template, in which the title bar is fixed, and the content of the form dynamically prints the cells of each row according to the number, and the color attribute of cells added without items is red;

S4. Generate a multi-channel CAN channel function test report form according to the test report template, in which the title bar is fixed, and the content of the form dynamically prints the cells of each row according to the number, dynamically sets the downward merge of the cells, and does not add the cell color through the item. attribute is red;

S5. Generate a power test report form according to the test report template, in which the form format is fixed. If it fails, the cell color attribute is red;

S6. Generate an output channel function test report form according to the test report template, in which the title bar is fixed, and the content of the form dynamically prints the cells of each row according to the number, and dynamically sets the downward merging of the cells. There are three levels of disabled items. If the first level is disabled, the current channel will not be printed. If the second level is disabled, the corresponding test type will not be printed. If the third level is disabled, the corresponding test item will not be printed. The items that are not printed in the table, that is, the items that do not exist in the product, are not within the scope of the test. For each test, the color attribute of the cells added to the failed items is red;

S7. Generate the input channel function test report form according to the test report template, in which the title bar is fixed, the content of the form dynamically prints the cells of each row according to the quantity, and dynamically sets the downward merging of the cells. There are four levels of disabled items. If the first level is disabled, the current channel will not be printed. If the second level is disabled, the corresponding pin type will not be printed. If the third level is disabled, the corresponding test type item will not be printed. If the fourth level is disabled, the corresponding test type item will not be printed. If the level is disabled, the corresponding test item will not be printed. The items that are not printed in the table, that is, the items that do not exist in the product, are not within the scope of the test. For each test, the color attribute of the cells added to the failed items is red;

S8. Generate a terminal temperature report form according to the test report template, and dynamically print the terminal temperature channel. If it does not pass, the cell color attribute is red;

S9. Generate a historical DTC fault report form according to the test report template, the form format is fixed, and each item is dynamically printed according to the number of records;

S10. Fill the table generated in the above steps with the table name, backfill the test results, and fill the main HTML frame of the report, save it to a specified location, and automatically pop up an HTML page. The current process ends.

The invention discloses an offline test tool of a power distribution module with a configurable test mode and a test method thereof, and relates to the technical field of hardware input and output test. The invention includes an industrial computer computer, industrial computer software, a test control board, a fixed head of a product to be tested, a test load box, a communication tool Kvaser CAN, and a communication tool USB-RS485. IPC computer: used to run IPC software, with a USB communication interface, connected to communication tools and send and receive instructions; IPC software: responsible for issuing instructions for the overall test process and controlling the work of all peripherals; test control board: responsible for Input a fixed voltage to the port of the product to be tested; fixed head of the device to be tested: used to place the product to be tested, and can be fixed by software control; test load box: responsible for carrying the current of the output channel of the product to be tested; Communication tool Kvaser CAN: responsible for data communication between the product to be tested and the computer of the industrial computer; communication tool USB-RS485: used to transmit the instructions issued by the software of the industrial computer to the test control board. The test control method of the present invention includes a test content and logic analysis method, a test process execution method, and a test report dynamic generation method. Through a series of testing procedures, the present invention detects the fault of the product and identifies the hardware quality, and generates fault report information. The present invention improves the detection quality, efficiency, reduces labor costs and the like with the characteristics of the whole-process automated testing process.

Method example:

A method for offline testing of a power distribution module in a configurable test mode of the present invention has been described sufficiently clearly in the tool embodiment, and will not be repeated here.

Claims (10)

1. An offline testing tool of a power distribution module is characterized by comprising an industrial personal computer running testing software, a testing control board card used for providing input voltage for a product to be tested, and a testing load used for connecting an output channel of the product to be tested; the industrial personal computer is in communication connection with the test control board card and is also provided with a test interface for being in communication connection with a product to be tested; the test load corresponds to each output channel of the product to be tested one by one, and the resistance value of the test load is matched with the performance of the corresponding output channel, so that the set current is achieved when each output channel outputs power to the corresponding test load; the industrial personal computer runs the test software and executes the following steps to realize the off-line test method:

1) controlling each output channel to be closed, detecting the current value of the output channel in a closed state, and judging whether each output channel can be reliably turned off;

2) and controlling each output channel to be opened, detecting the current value of the loaded output channel in the opening state, and judging whether the loaded output channel is reliable or not.

2. An offline testing tool of a power distribution module according to claim 1, wherein in step 1), whether each output channel can be reliably turned off is determined by whether the current value of the output channel in the off state is smaller than a set minimum value.

3. An offline testing tool of a power distribution module according to claim 1, wherein in step 2), if a stable and continuous current value can be detected, the on-load is determined to be reliable; and comparing the current value of the output channel in the open state and with the current value of the normal output channel of the type obtained in advance under the same test load, wherein the difference is larger than a set value, and the test is not passed.

4. The offline testing tool of the power distribution module according to claim 2 or 3, wherein the test control board card is further used for connecting proportional valve channels of products to be tested, and further comprises test loads for one-to-one corresponding connection with the proportional valve channels; the end of line test method also included testing of the proportional valve channel: and detecting the current value of the proportional valve channel at different opening degrees and the current value of the proportional valve channel at closing, comparing the current values with the current values of the normal proportional valve at corresponding opening degrees and at closing times under corresponding test loads, and if the difference is larger than a set value, not passing the test.

5. The tool of claim 4, wherein the test control board is further configured to connect to an input channel of a product to be tested; the off-line testing method also comprises the following steps of: level signals are input to the input channels through the test control board card, and the states of corresponding switching values are read to judge whether each input channel is abnormal.

6. The offline testing tool of the power distribution module according to claim 5, wherein in the process of testing the input channels, the offline testing tool first sends an instruction to switch all channels that can be switched to high-efficiency mode, then controls the test control board card to output low level to all channels that are in high-efficiency mode, then sequentially switches the level of the board card interface corresponding to the channel that is in high-efficiency mode to high level, reads the switching value states of all input channels of the product to be tested after a set time is delayed, and compares whether all channels that are in high-efficiency mode are abnormal.

7. The offline testing tool of the power distribution module according to claim 5, wherein in the process of testing the input channels, the offline testing tool further sends an instruction to switch all channels that can be switched to low-effective mode, then controls the test control board card to output high level to all channels in low-effective mode, then sequentially switches the level of the board card interface corresponding to the channel in low-effective mode to low level, reads the switching value state of all input channels of the product to be tested after a set time is delayed, and compares whether all channels in low-effective mode are abnormal.

8. The tool of claim 6 or 7, wherein the test control board outputs a high level to the input channel in the high active mode, and if the on/off state of the input channel is on after a set time, there is no exception; the test control board outputs low level to the input channel in the high effective mode, and if the switching value state of the channel is off after the set time, no abnormity occurs; the test control board outputs low level to the input channel in the low effective mode, and if the switching value state of the channel is on after the set time, no abnormity occurs; the test control board outputs high level to the input channel in the low effective mode, and if the switching value state of the channel is off after the set time, no abnormity occurs.

9. The tool of claim 8, wherein the test control board switches to connect the high level or low level output of the port of the corresponding channel via a relay; the industrial personal computer is connected with the test control board card through serial port communication, and the test interface is a CAN interface.

10. A method of end-of-line testing of an automotive power distribution module comprising the method of end-of-line testing in the end-of-line testing tool of the automotive power distribution module of any one of claims 1 to 9.

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