An automated testing method for battery system switching circuits

Abstract

This invention discloses an automated testing method for switch circuits in a battery system, comprising the following steps: dividing the switches into different cascades according to the number of series stages; setting voltage monitoring points at the output points of the switches; calculating the total number of monitoring points in the test system and calculating the minimum test duration for the battery system; connecting the test system to the battery system and obtaining switch control authority, sending on / off commands according to the test sequence, and sequentially reading the corresponding voltage monitoring point information; comparing the read voltage monitoring point information with a preset voltage range, and feeding back the test progress and results to the host computer in real time. This method is more reliable and efficient than manual testing; it designs reasonable voltage measurement points based on the switch logic structure, covering the pass / fail tests of all switches without redundant testing that would reduce test efficiency. The reasonable test sequence, using a breadth-first testing order, ensures that the function of each switch is tested more effectively than depth-first testing.

Description

Technical Field

[0001] This invention belongs to the field of battery testing, specifically a method for testing automated switching circuits of battery systems. Background Technology

[0002] In battery-powered systems, switching devices are needed to control the on / off state of charging / discharging circuits and other signal input / output circuits. Therefore, the proper functioning of these switching devices and their associated circuits significantly impacts the normal operation of the battery system. Furthermore, more complex battery systems utilize a greater number of switching devices, and the logical relationships between these devices become increasingly complex. During manufacturing, to prevent errors during manual or machine assembly, matching tests must be performed on these switching devices and circuits. This patent designs a rigorous feedback testing method for the switching logic structure of battery systems, analyzes the logical relationships between individual switches, and enables multi-channel parallel testing, greatly improving testing efficiency. It also addresses the issue of automated and efficient testing of switching circuits for different battery system switch designs. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a technical solution for an automated testing method for battery system switching circuits.

[0004] The aforementioned method for testing automated switching circuits of a battery system includes the following steps:

[0005] S1 divides the switches into different series stages according to the number of series stages;

[0006] S2 sets a voltage monitoring point at the output point of the switch;

[0007] S3 calculates the total number of voltage monitoring points in the test system, performs tests according to the breadth test sequence, and calculates the minimum test duration for the battery system.

[0008] The S4 test system connects to the battery system and obtains switch control authority. According to the test sequence in step S3, it sends on / off commands and reads the corresponding voltage monitoring point information in sequence.

[0009] S5 compares the voltage monitoring point information it reads with the preset voltage range and feeds back the test progress and results to the host computer in real time.

[0010] Furthermore, in step S2, the method for setting the voltage monitoring point is as follows:

[0011] For switches connected in series, a voltage monitoring point is set at the output point of each switch;

[0012] For parallel switches, a voltage monitoring point is set at the common output point of the parallel switches.

[0013] Furthermore, in step S3, the formula for calculating the total number of voltage monitoring points is:

[0014]

[0015] Among them, NUM point NUM indicates the total number of voltage monitoring points that need to be set. key PARAL_NUM represents the number of switches in the battery system; n represents the number of parallel connections in the system, which is calculated by counting the number of voltage monitoring points that converge on at least two input signal lines; PARAL_NUM i This represents the number of switches in the i-th parallel connection.

[0016] Furthermore, in step S3, the test logic is as follows:

[0017] Test the switches in ascending order of the number of cascade levels. If there are parallel switches with the same number of cascade levels, select one to test first. After that, test the remaining switches. For switches in different branches, the tests can be performed simultaneously.

[0018] For switches connected in series, the next switch with a larger cascade number can only be tested after the switch with a smaller cascade number has passed the test. Before the switch with a larger cascade number is tested, the switch with a smaller cascade number must be closed.

[0019] For parallel switches, since they share the same voltage monitoring point, the other switch can only be tested after the test of one switch is completed, and the other switch must be disconnected when testing one switch.

[0020] Furthermore, in step S3, the minimum test duration is:

[0021]

[0022] NUM series This indicates the number of series.

[0023] Furthermore, in step S5, if the voltage at the voltage monitoring point is within the set range, the test is passed.

[0024] If the voltage at the voltage monitoring point is outside the set range, the test fails, and the battery system that failed the test will be processed.

[0025] Furthermore, in step S4, controlling permissions includes the following steps:

[0026] After the S4.1 test system is connected to the battery system, it sends a test switch command to the battery system.

[0027] After receiving the instruction, the S4.2 battery system transfers control of the switch to the test system;

[0028] After the S4.3 test is completed, the test system sends a command to end the test, and the control of the switch is transferred to the battery system.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] An automated switch testing method is presented, offering greater reliability and efficiency compared to manual testing. It designs appropriate voltage measurement points based on the switch's logic structure, covering the pass / fail tests of all switches without redundant testing that could reduce efficiency. A well-designed breadth-first testing sequence, compared to depth-first testing, ensures that the function of every switch is tested. This method can estimate the required voltage measurement points and test duration based on the formulas provided above, guiding the design of a test system compatible with battery switch systems. It can also estimate the overall testing time for a batch of products, allowing testers to schedule tests in advance. The system can integrate with a host computer to visually display test progress and results to testers, enabling human-computer interaction. Attached Figure Description

[0031] Figure 1 Diagram showing the setup of voltage monitoring points;

[0032] Figure 2 This is a test schematic diagram for the battery switch system. Detailed Implementation

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] like Figure 1-2 As shown, an automated switching circuit testing method for a battery system includes the following steps:

[0035] S1 divides the switches into different series stages based on the number of series stages.

[0036] S2 sets a voltage monitoring point at the output point of the switch. For switches connected in series, one voltage monitoring point is set at the output point of each switch.

[0037] For parallel switches, a voltage monitoring point is set at the common output point of the parallel switches.

[0038] S3 is calculated according to the formula. Calculate the total number of voltage monitoring points in the test system, where NUM point NUM indicates the total number of voltage monitoring points that need to be set. keyPARAL_NUM represents the number of switches in the battery system; n represents the number of parallel connections in the system, which is calculated by counting the number of voltage monitoring points that converge on at least two input signal lines; PARAL_NUM i This represents the number of switches in the i-th parallel connection.

[0039] Test in the breadth test order, according to the order of the number of cascade levels of the switches from smallest to largest. When there are parallel switches with the same number of cascade levels, select one to test first. After that, test the remaining switches. For example, in the branch where switch 2 is located, the test order of the switches is switch 2, switch 5, switch 6, switch 12, or switch 2, switch 6, switch 5, switch 12.

[0040] For switches in different branches, the test can be performed simultaneously. For example, switch 1 and switch 2 can be tested at the same time, and switch 7 and switch 8 can also be tested at the same time.

[0041] For switches connected in series, the next switch with a larger cascade number can only begin testing after the switch with the smaller cascade number has passed the test. Furthermore, before testing a switch with a larger cascade number, a switch with a smaller cascade number must be closed. In this embodiment, switch 4 can only begin testing after switch 1 has passed the test, and switch 1 must be closed before testing switch 4.

[0042] For parallel switches, since they share the same voltage monitoring point, the other switch can only be tested after the test of one switch is completed, and the other switch must be disconnected while testing one switch. In this embodiment, switch 6 must be disconnected when testing switch 5, and switch 5 must be disconnected when testing switch 6.

[0043] Finally, calculate the minimum test duration for the battery system.

[0044] NUM series This indicates the number of series.

[0045] The S4 test system connects to the battery system and obtains switch control authority. According to the test sequence in step S3, it sends on / off commands and sequentially reads the corresponding voltage monitoring point information. Control authority transfers accordingly with the connection of the test system. When the test system connects to the battery system, it sends a test switch command to the battery system. Upon receiving this command, the battery system transfers switch control authority to the test system. After the test is completed, the test system sends a test end command, and switch control authority is transferred back to the battery system.

[0046] S5 compares the read voltage monitoring point information with the preset voltage range and feeds back the test progress and results to the host computer in real time. If the voltage read from the monitoring point is within the set range, the test passes.

[0047] If the voltage read from the voltage monitoring point is outside the set range, the test fails, and the battery system that failed the test will be processed. The processing method is that the operator will manually retest, troubleshoot, repair, or scrap the switching part of the battery system that failed the test.

[0048] Specifically, a control system contains multiple switches with different logical relationships, which can be broadly categorized into series and parallel connections. A series connection is defined as a top-to-bottom connection, and these switches can be further classified into different cascade levels based on the number of series stages.

[0049] To test the proper functioning of the switches and their associated drive circuits, a corresponding voltage monitoring point needs to be set at the output point of each switch (the arrow direction indicates the signal transmission direction; inward arrows indicate input, and outward arrows indicate output). Each voltage monitoring point can collect voltage information at that point and feed it back to the test system. For switches connected in series, a voltage monitoring point needs to be set at the output point of each switch; for switches connected in parallel, such as... Figure 1 For switches 5 and 6, only a common signal monitoring point needs to be set at their common output point, i.e. Figure 1 Measurement point 5 is shown in the diagram.

[0050] During use, the testing system intervenes in the battery system to gain control of the switch. Following the aforementioned testing sequence, it sequentially sends "close" and "open" commands to the switch and reads information from the corresponding voltage monitoring points. This information is then compared to a pre-set voltage range. If the voltage at the monitored point is within the set range, the test passes; otherwise, it fails. Throughout the test, the system provides real-time feedback on the progress and results to the host computer, allowing testers to monitor the progress and results and address any failed battery system tests.

[0051] An automated switch testing method is presented, offering greater reliability and efficiency compared to manual testing. It designs appropriate voltage measurement points based on the switch's logic structure, covering the pass / fail tests of all switches without redundant testing that could reduce efficiency. A well-designed breadth-first testing sequence, compared to depth-first testing, ensures that the function of every switch is tested. This method can estimate the required voltage measurement points and test duration based on the formulas provided above, guiding the design of a test system compatible with battery switch systems. It can also estimate the overall testing time for a batch of products, allowing testers to schedule tests in advance. The system can integrate with a host computer to visually display test progress and results to testers, enabling human-computer interaction.

Claims

1. A battery system automatic switch circuit test method, characterized in that, comprising the following steps: S1. Dividing the switches into different series according to the series number; S2. Setting voltage monitoring points at the output points of the switches; the setting method of the voltage monitoring points is: for the series switches, setting one voltage monitoring point at the output point of each switch; for the parallel switches, setting one voltage monitoring point at the common output point of the parallel switches; S3. Calculating the total number of voltage monitoring points of the test system, testing according to the breadth test sequence, and calculating the minimum test time of the battery system; S4. Connecting the test system to the battery system and obtaining the switch control authority, sending the opening and closing commands according to the test sequence in step S3, and reading the corresponding voltage monitoring point information in turn; S5. Comparing the read voltage monitoring point information with the preset voltage range, and feeding back the test progress and result to the upper computer in real time. 2.The battery system automatic switch circuit test method according to claim 1, characterized in that, in step S3, the calculation formula of the total number of voltage monitoring points is: Wherein, NUM point represents the total number of voltage monitoring points that need to be set; NUM key represents the number of switches in the battery system; n represents the number of parallel relationships existing in the system, and the counting method of the relationship number is the number of voltage monitoring points converging more than or equal to 2 input signal lines; PARAL_NUM i represents the number of switches in the i-th parallel relationship. 3.The battery system automatic switch circuit test method according to claim 1, characterized in that, in step S3, the test logic is: testing according to the order from small to large of the series number of the switches, when there are parallel switches with the same series number, then testing one of them first, and then testing the remaining switches, for the switches in different branches, the testing can be carried out at the same time; for the series switches, only after the switch with small series number passes the test, the switch with large series number can start the test, and before the test of the switch with large series number, the switch with small series number must be closed; for the parallel switches, since they share the same voltage monitoring point, one of the switches must be tested before the other one can start the test, and when one of the switches is being tested, the other one must be disconnected. 4.The battery system automatic switch circuit test method according to claim 2, characterized in that, in step S3, the minimum test time is: NUM series denotes the series of cascades. 5.The battery system automatic switch circuit test method according to claim 1, characterized in that, in step S5, if the voltage of the read voltage monitoring point is within the set range, the test is passed; if the voltage of the read voltage monitoring point is outside the set range, the test fails, and the battery system that fails the test is processed. 6.The battery system automatic switch circuit test method according to claim 1, characterized in that in step S4, the control authority includes the following steps: S4.

1. After the test system accesses the battery system, sending the instruction of testing the switch to the battery system; S4.

2. After receiving the instruction, the battery system transfers the control authority of the switch to the test system; S4.

3. After the test is completed, the test system sends the instruction of ending the test, and the control authority of the switch is transferred to the battery system.

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