Aluminum electrolytic capacitor performance test system

Abstract

The present invention relates to the technical field of aluminum electrolytic capacitor performance testing, and discloses an aluminum electrolytic capacitor performance testing system including a wiring component detection module, a capacitance testing module, a withstand voltage testing module, a leakage current testing module and a comprehensive performance evaluation module, wherein the capacitance testing module includes a capacitance testing unit and a capacitance test result evaluation unit, the withstand voltage testing module includes a withstand voltage testing unit and a withstand voltage test result evaluation unit, and the leakage current testing module includes a leakage current testing unit and a leakage current test result evaluation unit. The system feeds back the wiring conditions before performing capacitance testing, withstand voltage testing and leakage current testing on the aluminum electrolytic capacitor, judges whether the wiring needs to be cleaned, and outputs the aluminum electrolytic capacitor performance test results based on the capacitance evaluation results, withstand voltage test results and leakage current test evaluation results, outputs more accurate aluminum electrolytic capacitor performance test results, and accurately tests the performance of the aluminum electrolytic capacitor.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum electrolytic capacitor performance testing, and in particular to an aluminum electrolytic capacitor performance testing system. Background Art

[0002] With the rapid development of consumer electronic products, aluminum electrolytic capacitors have been growing steadily in the field of consumer electronics. At the same time, their application areas have been expanded in many emerging fields such as energy-saving lamps, inverters, and new energy with structural transformation and technological progress, and the scope of application is becoming wider and wider. The basic role of aluminum electrolytic capacitors in electronic circuits can be generally summarized as: passing AC and blocking DC, with the functions of filtering, bypassing, coupling, and fast charging and discharging, and with the characteristics of small size, large storage capacity, and high cost performance. With the advancement of modern technology and the continuous improvement of capacitor performance, electrolytic capacitors have been widely used in consumer electronic products, communication products, computers and peripheral products, new energy, automation control, automotive industry, optoelectronic products, high-speed railways, aviation, and military equipment, etc.

[0003] As the quality requirements of electronic products become higher and higher, the electrical performance requirements of capacitor products themselves are also getting higher and higher. The existing electrical performance test conditions for fatigue resistance of electrolytic capacitor products can no longer meet the testing requirements of higher performance products. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an aluminum electrolytic capacitor performance testing system, which has the advantages of accurately testing the performance of aluminum electrolytic capacitors and solves the above technical problems.

[0005] To achieve the above object, the present invention provides the following technical solutions: an aluminum electrolytic capacitor performance test system, comprising a wiring component detection module, a capacitance test module, a withstand voltage test module, a leakage current test module and a comprehensive performance evaluation module;

[0006] The wiring component detection module is used to provide feedback on the wiring condition of the aluminum electrolytic capacitor before the capacitance test module, the withstand voltage test module and the leakage current test module are tested, and timely feedback is provided if there is any abnormal wiring;

[0007] The capacitance test module includes a capacitance test unit and a capacitance test result evaluation unit, wherein the capacitance test unit is used to test the capacitance of the aluminum electrolytic capacitor and output the capacitance test result, and the capacitance test result evaluation unit performs evaluation based on the capacitance test result and obtains the capacitance evaluation result;

[0008] The withstand voltage test module includes a withstand voltage test unit and a withstand voltage test result evaluation unit. The withstand voltage test unit is used to perform a withstand voltage test on the aluminum electrolytic capacitor and output the withstand voltage test result. The withstand voltage test result evaluation unit performs an evaluation calculation based on the withstand voltage test result to obtain a withstand voltage test evaluation result.

[0009] The leakage current test module includes a leakage current test unit and a leakage current test result evaluation unit. The leakage current test unit is used to perform a leakage current test on the aluminum electrolytic capacitor and output a leakage current test result. The leakage current test result evaluation unit performs an evaluation calculation based on the leakage current test result to obtain a leakage current test evaluation result.

[0010] The comprehensive performance evaluation module outputs the aluminum electrolytic capacitor performance test result based on the capacitance evaluation result, the withstand voltage test result and the leakage current test evaluation result.

[0011] As a preferred technical solution of the present invention, the capacitance test unit tests the capacitance of the aluminum electrolytic capacitor and outputs the specific expression of the capacitance test result as follows:

[0012]

[0013] in, Indicates total A dataset of aluminum electrolytic capacitor capacitance test results, Respectively represent Aluminum electrolytic capacitor capacitance test results, , No. Aluminum electrolytic capacitor capacitance test results, , No. Aluminum electrolytic capacitor capacitance test results.

[0014] As a preferred technical solution of the present invention, the capacitance test result evaluation unit performs evaluation based on the capacitance test result, and obtains a specific calculation expression of the capacitance evaluation result as follows:

[0015]

[0016] in, Indicates the capacitance evaluation result, Indicates Aluminum electrolytic capacitor capacitance test results, Indicates the rated capacitance of aluminum electrolytic capacitors. express The minimum value in the data set of aluminum electrolytic capacitor capacitance test results, express The data set of aluminum electrolytic capacitor capacitance test results is removed The mean of all elements except the minimum value in the data set of aluminum electrolytic capacitor capacitance test results.

[0017] As a preferred technical solution of the present invention, the withstand voltage test unit performs a withstand voltage test on the aluminum electrolytic capacitor, and outputs a specific expression of the withstand voltage test result as follows:

[0018]

[0019] in, express A dataset of aluminum electrolytic capacitor withstand voltage test results, Respectively represent Aluminum electrolytic capacitor withstand voltage test results, , No. Aluminum electrolytic capacitor withstand voltage test results, , No. Aluminum electrolytic capacitor withstand voltage test results.

[0020] As a preferred technical solution of the present invention, the withstand voltage test result evaluation unit performs evaluation calculation based on the withstand voltage test result, and obtains the expression of the withstand voltage test evaluation result as follows:

[0021]

[0022] in, express The withstand voltage test results of aluminum electrolytic capacitors are summed up. Indicates Aluminum electrolytic capacitor withstand voltage test results, Indicates the withstand voltage test evaluation result.

[0023] As a preferred technical solution of the present invention, the leakage current testing unit performs a leakage current test on the aluminum electrolytic capacitor, and outputs a specific expression of the leakage current test result as follows:

[0024]

[0025] in, express Aluminum electrolytic capacitor leakage current test results, Respectively represent Aluminum electrolytic capacitor leakage current test results, , No. Aluminum electrolytic capacitor leakage current test results, , No. Aluminum electrolytic capacitor leakage current test results.

[0026] As a preferred technical solution of the present invention, the leakage current test result evaluation unit performs evaluation calculation based on the leakage current test result, and obtains the specific expression of the leakage current test evaluation result as follows:

[0027]

[0028] in, Indicates the leakage current test evaluation result, Indicates the standard leakage current of aluminum electrolytic capacitors. express The maximum value in the aluminum electrolytic capacitor leakage current test result data set.

[0029] As a preferred technical solution of the present invention, the comprehensive performance evaluation module outputs the specific expression of the aluminum electrolytic capacitor performance test result based on the capacitance evaluation result, the withstand voltage test result and the leakage current test evaluation result as follows:

[0030]

[0031] in, Indicates the performance test results of aluminum electrolytic capacitors. Indicates the leakage current test evaluation result, Indicates the result of the withstand voltage test evaluation. Indicates the capacitance evaluation result, Represents a natural constant.

[0032] As a preferred technical solution of the present invention, the specific working steps of the wiring component detection module are as follows:

[0033] Step A1, when any one of the capacitance test module, the withstand voltage test module and the leakage current test module is tested, a signal is sent to the wiring component detection module, and the wiring component detection module is started;

[0034] Step A2: The wiring component detection module recognizes the image at the detection joint;

[0035] Step A3: judging the recognition result of step A2, if the judgment result is that cleaning is needed, reminding the operator to clean, if the judgment result is that cleaning is not needed, reminding the operator to perform a test.

[0036] As a preferred technical solution of the present invention, the specific expression for judging and identifying in step A2 is as follows:

[0037]

[0038] in, represents the judgment coefficient, If the result indicates that cleaning is not required, the operator is reminded to perform the test. If the result indicates that cleaning is required, the operator is reminded to clean. represents the image area at the joint, represents the area of ​​abnormal points in the positive electrode image, Indicates the area of ​​abnormal points in the negative image, where the abnormal points represent the difference area between the current captured image and the stored image.

[0039] Compared with the prior art, the present invention provides an aluminum electrolytic capacitor performance test system, which has the following beneficial effects:

[0040] The present invention provides feedback on the wiring conditions before respectively performing capacitance test, withstand voltage test and leakage current test on the aluminum electrolytic capacitor to judge whether the wiring location needs to be cleaned, thereby ensuring the stability of the test, and outputting the aluminum electrolytic capacitor performance test result based on the capacitance evaluation result, the withstand voltage test result and the leakage current test evaluation result to output a more accurate aluminum electrolytic capacitor performance test result, thereby accurately testing the performance of the aluminum electrolytic capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Schematic diagram of the system framework of the present invention. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figure 1 , an aluminum electrolytic capacitor performance test system, including a wiring component detection module, a capacitance test module, a withstand voltage test module, a leakage current test module and a comprehensive performance evaluation module;

[0044] The wiring component detection module is used to provide feedback on the wiring status of the aluminum electrolytic capacitor before the capacitance test module, the withstand voltage test module and the leakage current test module are tested. If there is any abnormal wiring, timely feedback is provided. The specific working steps of the wiring component detection module are as follows:

[0045] Step A1, when any one of the capacitance test module, the withstand voltage test module and the leakage current test module is tested, a signal is sent to the wiring component detection module, and the wiring component detection module is started;

[0046] Step A2: The wiring component detection module recognizes the image at the detection joint. The specific expression for judging and identifying in step A2 is as follows:

[0047]

[0048] in, represents the judgment coefficient, If the result indicates that cleaning is not required, the operator is reminded to perform the test. If the result indicates that cleaning is required, the operator is reminded to clean. represents the image area at the joint, represents the area of ​​abnormal points in the positive electrode image, Indicates the area of ​​abnormal points in the negative image. The abnormal points represent the difference area between the current captured image and the stored image.

[0049] Step A3, judging the recognition result of step A2, if the judgment result is that cleaning is needed, reminding the operator to clean, if the judgment result is that cleaning is not needed, reminding the operator to perform a test;

[0050] The capacitance test module includes a capacitance test unit and a capacitance test result evaluation unit. The capacitance test unit is used to test the capacitance of the aluminum electrolytic capacitor and output the capacitance test result. The capacitance test result evaluation unit evaluates based on the capacitance test result and obtains the capacitance evaluation result. The capacitance test unit tests the capacitance of the aluminum electrolytic capacitor and outputs the capacitance test result. The specific expression is as follows:

[0051]

[0052] in, Indicates total A dataset of aluminum electrolytic capacitor capacitance test results, Respectively represent Aluminum electrolytic capacitor capacitance test results, , No. Aluminum electrolytic capacitor capacitance test results, , No. The capacitance test result of an aluminum electrolytic capacitor is evaluated by the capacitance test result evaluation unit, and the specific calculation expression of the capacitance evaluation result is obtained as follows:

[0053]

[0054] in, Indicates the capacitance evaluation result, Indicates Aluminum electrolytic capacitor capacitance test results, Indicates the rated capacitance of aluminum electrolytic capacitors. express The minimum value in the data set of aluminum electrolytic capacitor capacitance test results, express The data set of aluminum electrolytic capacitor capacitance test results is removed The mean of all elements except the minimum value in the data set of the capacitance test results of aluminum electrolytic capacitors;

[0055] The withstand voltage test module includes a withstand voltage test unit and a withstand voltage test result evaluation unit. The withstand voltage test unit is used to perform a withstand voltage test on the aluminum electrolytic capacitor and output the withstand voltage test result. The withstand voltage test result evaluation unit performs an evaluation calculation based on the withstand voltage test result to obtain the withstand voltage test evaluation result. The withstand voltage test unit performs a withstand voltage test on the aluminum electrolytic capacitor and outputs the withstand voltage test result. The specific expression is as follows:

[0056]

[0057] in, express A dataset of aluminum electrolytic capacitor withstand voltage test results, Respectively represent Aluminum electrolytic capacitor withstand voltage test results, , No. Aluminum electrolytic capacitor withstand voltage test results, , No. The withstand voltage test result of an aluminum electrolytic capacitor is obtained. The withstand voltage test result evaluation unit performs evaluation calculation based on the withstand voltage test result, and the expression of the withstand voltage test evaluation result is as follows:

[0058]

[0059] in, express The withstand voltage test results of aluminum electrolytic capacitors are summed up. Indicates Aluminum electrolytic capacitor withstand voltage test results, Indicates the result of the withstand voltage test evaluation;

[0060] The leakage current test module includes a leakage current test unit and a leakage current test result evaluation unit. The leakage current test unit is used to perform a leakage current test on the aluminum electrolytic capacitor and output the leakage current test result. The leakage current test result evaluation unit performs an evaluation calculation based on the leakage current test result to obtain a leakage current test evaluation result. The leakage current test unit performs a leakage current test on the aluminum electrolytic capacitor and outputs the leakage current test result. The specific expression is as follows:

[0061]

[0062] in, express Aluminum electrolytic capacitor leakage current test results, Respectively represent Aluminum electrolytic capacitor leakage current test results, , No. Aluminum electrolytic capacitor leakage current test results, , No. The leakage current test result of the aluminum electrolytic capacitor is obtained. The leakage current test result evaluation unit performs evaluation calculation based on the leakage current test result, and obtains the specific expression of the leakage current test evaluation result as follows:

[0063]

[0064] in, Indicates the leakage current test evaluation result, Indicates the standard leakage current of aluminum electrolytic capacitors. express The maximum value in the aluminum electrolytic capacitor leakage current test result data set;

[0065] The comprehensive performance evaluation module outputs the performance test results of the aluminum electrolytic capacitor based on the capacitance evaluation results, the withstand voltage test results, and the leakage current test evaluation results. The specific expression of the performance test results of the aluminum electrolytic capacitor output by the comprehensive performance evaluation module based on the capacitance evaluation results, the withstand voltage test results, and the leakage current test evaluation results is as follows:

[0066]

[0067] in, Indicates the performance test results of aluminum electrolytic capacitors. Indicates the leakage current test evaluation result, Indicates the result of the withstand voltage test evaluation. Indicates the capacitance evaluation result, Represents a natural constant.

[0068] Embodiment 1:

[0069] Data set for the capacitance test module during the capacitance test ,at this time , at this time , for the withstand voltage test result dataset ,in It means the withstand voltage test is passed. Indicates that the withstand voltage test failed. , which indicates that 4 capacitors are measured at 4 different voltages. The leakage current test results are , , , The comprehensive performance evaluation module outputs the performance test results of aluminum electrolytic capacitors based on the capacitance evaluation results, voltage withstand test results and leakage current test evaluation results. ;

[0070] Embodiment 2:

[0071] Data set for the capacitance test module during the capacitance test ,at this time , at this time , for the withstand voltage test result dataset ,in It means the withstand voltage test is passed. Indicates that the withstand voltage test failed. , for the leakage current test results , , , The comprehensive performance evaluation module outputs the performance test results of aluminum electrolytic capacitors based on the capacitance evaluation results, voltage withstand test results and leakage current test evaluation results. At this time, it can be seen that the aluminum electrolytic capacitors in the second embodiment have a better withstand voltage test result than the withstand voltage test result in the first embodiment, but the leakage current exceeds the set threshold in the leakage current test, resulting in the overall aluminum electrolytic capacitor performance test result being higher than the result in the first embodiment, thereby accurately testing the performance of the aluminum electrolytic capacitors and giving the performance test results of the batch of aluminum electrolytic capacitors.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A performance test system for aluminum electrolytic capacitors, characterized in that: It includes wiring component detection module, capacitance test module, voltage resistance test module, leakage current test module and comprehensive performance evaluation module; The wiring component detection module is used to provide feedback on the wiring condition of the aluminum electrolytic capacitor before the capacitance test module, the withstand voltage test module and the leakage current test module are tested, and timely feedback is provided if there is any abnormal wiring; The capacitance test module includes a capacitance test unit and a capacitance test result evaluation unit. The capacitance test unit is used to test the capacitance of the aluminum electrolytic capacitor and output the capacitance test result. The capacitance test result evaluation unit evaluates based on the capacitance test result and obtains the capacitance evaluation result. The specific calculation expression is as follows: ； in, Indicates the capacitance evaluation result, Indicates Aluminum electrolytic capacitor capacitance test results, Indicates the rated capacitance of aluminum electrolytic capacitors. express The minimum value in the data set of aluminum electrolytic capacitor capacitance test results, express Data set removal of aluminum electrolytic capacitor capacitance test results The mean of all elements except the minimum value in the data set of the capacitance test results of aluminum electrolytic capacitors; The withstand voltage test module includes a withstand voltage test unit and a withstand voltage test result evaluation unit. The withstand voltage test unit is used to perform a withstand voltage test on the aluminum electrolytic capacitor and output the withstand voltage test result. The withstand voltage test result evaluation unit performs an evaluation calculation based on the withstand voltage test result to obtain a withstand voltage test evaluation result. The specific expression is as follows: ； in, express The withstand voltage test results of aluminum electrolytic capacitors are summed up. Indicates Aluminum electrolytic capacitor withstand voltage test results, Indicates the result of the withstand voltage test evaluation; The leakage current test module includes a leakage current test unit and a leakage current test result evaluation unit. The leakage current test unit is used to perform a leakage current test on the aluminum electrolytic capacitor and output a leakage current test result. The leakage current test result evaluation unit performs an evaluation calculation based on the leakage current test result to obtain a leakage current test evaluation result. The specific expression is as follows: ； in, Indicates the leakage current test evaluation result, Indicates the standard leakage current of aluminum electrolytic capacitors. express The maximum value in the aluminum electrolytic capacitor leakage current test result data set; The comprehensive performance evaluation module outputs the performance test results of the aluminum electrolytic capacitor based on the capacitance evaluation results, the withstand voltage test results and the leakage current test evaluation results. The specific expression is as follows: ； in, Indicates the performance test results of aluminum electrolytic capacitors. Indicates the leakage current test evaluation result, Indicates the result of the withstand voltage test evaluation. Indicates the capacitance evaluation result, Represents a natural constant.

2. The aluminum electrolytic capacitor performance testing system according to claim 1, characterized in that: The capacitance test unit tests the capacitance of the aluminum electrolytic capacitor and outputs the capacitance test result in the following specific expression: ； in, Indicates total A dataset of aluminum electrolytic capacitor capacitance test results, Respectively represent Aluminum electrolytic capacitor capacitance test results, , No. Aluminum electrolytic capacitor capacitance test results, , No. Aluminum electrolytic capacitor capacitance test results.

3. The aluminum electrolytic capacitor performance testing system according to claim 1, characterized in that: The withstand voltage test unit performs a withstand voltage test on the aluminum electrolytic capacitor and outputs the withstand voltage test result in the following specific expression: ； in, express A dataset of aluminum electrolytic capacitor withstand voltage test results, Respectively represent Aluminum electrolytic capacitor withstand voltage test results, , No. Aluminum electrolytic capacitor withstand voltage test results, , No. Aluminum electrolytic capacitor withstand voltage test results.

4. The aluminum electrolytic capacitor performance testing system according to claim 1, characterized in that: The leakage current test unit performs a leakage current test on the aluminum electrolytic capacitor and outputs a leakage current test result in the following specific expression: ； in, express Aluminum electrolytic capacitor leakage current test results, Respectively represent Aluminum electrolytic capacitor leakage current test results, , No. Aluminum electrolytic capacitor leakage current test results, , No. Aluminum electrolytic capacitor leakage current test results.

5. The aluminum electrolytic capacitor performance testing system according to claim 1, characterized in that: The specific working steps of the wiring component detection module are as follows: Step A1, when any one of the capacitance test module, the withstand voltage test module and the leakage current test module is tested, a signal is sent to the wiring component detection module, and the wiring component detection module is started; Step A2: The wiring component detection module recognizes the image at the detection joint; Step A3: judging the recognition result of step A2, if the judgment result is that cleaning is needed, reminding the operator to clean, if the judgment result is that cleaning is not needed, reminding the operator to perform a test.

6. The aluminum electrolytic capacitor performance testing system according to claim 5, characterized in that: The specific expression for judging and identifying in step A2 is as follows: ； in, represents the judgment coefficient, If the result indicates that cleaning is not required, the operator is reminded to perform the test. If the result indicates that cleaning is required, the operator is reminded to clean. represents the image area at the joint, represents the area of ​​abnormal points in the positive electrode image, Indicates the area of ​​abnormal points in the negative image, where the abnormal points represent the difference area between the current captured image and the stored image.

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