Circuit device for testing normal operation of lead-acid battery charger

Abstract

The invention discloses a test circuit device for normal operation of a lead-acid battery charger. The test circuit device comprises a positive electrode input terminal, a negative electrode input terminal, a power supply main switch, an electrical parameter measuring switch, a capacitance measuring switch, a capacitance measuring instrument, a direct-current electronic load, a plurality of capacitors and corresponding single-stage switches, the power supply main switch is connected with the capacitance measuring instrument and the direct current electronic load; the single-stage switch is used for controlling connection of the corresponding capacitor, one end of the single-stage switch is connected with the anode input terminal, and the other end of the single-stage switch is connected with the capacitor; the capacitance measuring instrument is connected with the capacitor in series, and a capacitance measuring switch is arranged between the capacitance measuring instrument and the capacitor; one end of the electrical parameter measuring switch is connected with the positive input terminal and the negative input terminal, and the other end of the electrical parameter measuring switch is connected with the direct-current electronic load. According to the utility model, resistors and capacitors required by the test circuit can be rapidly configured, different output voltage and current requirements of the charger can be satisfied, time cost can be saved, and test efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the field of testing technology, and in particular to a testing circuit device for normal operation of a lead-acid battery charger. Background Art

[0002] In daily testing, capacitors and resistors of different specifications need to be connected at the back end according to the different output specifications of the battery charger. Figure 1 As shown, B is the lead-acid battery charger; A is the average current ammeter; C is the capacitor capacity; R is the variable resistor; T is the output terminal of the lead-acid battery charger; V is the average reading voltmeter; because the output specifications of each charger are different, each time before the test, the resistor and capacitor specifications must be calculated, and then the relevant resistors and capacitors must be found and configured to build a suitable test circuit device for the normal operation of the battery charger. In this process, technicians often spend a lot of time looking for and configuring suitable resistors and capacitors; and the accessories are prone to connection errors during the connection process, which may cause the risk of electric shock or personal injury, seriously affecting the test efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, the purpose of the present invention is to provide a test circuit device for the normal operation of a lead-acid battery charger, which can not only quickly configure the resistors and capacitors required for the test circuit, but also meet the different output voltage and current requirements of the charger, and can also save time and cost, improve test efficiency, and avoid the risk of personal injury.

[0004] To achieve the above-mentioned purpose, the embodiment of the present invention proposes a test circuit device for the normal operation of a lead-acid battery charger, comprising: a positive input terminal, a negative input terminal, a main power switch, an electrical parameter measurement switch, a capacitance measurement switch, a capacitance measuring instrument, a DC electronic load, a plurality of capacitors and corresponding single-stage switches; wherein,

[0005] A positive input terminal, used to connect the positive terminal of the output terminal of the lead-acid battery charger;

[0006] Negative input terminal, used to connect the negative pole of the output terminal of the lead-acid battery charger;

[0007] The main power switch is connected to a capacitance measuring instrument and a DC electronic load;

[0008] The single-pole switch is used to control the connection of the corresponding capacitor, one end of which is connected to the positive input terminal and the other end of which is connected to the capacitor;

[0009] The capacitance measuring instrument is connected in series with the capacitor, and a capacitance measuring switch is arranged between the two;

[0010] One end of the electrical parameter measurement switch is connected to the positive input terminal and the negative input terminal respectively, and the other end is connected to the DC electronic load.

[0011] According to some embodiments of the present invention, the capacitance measuring instrument includes a first display module for displaying the total capacitance of each capacitor connected to the test circuit.

[0012] According to some embodiments of the present invention, the DC electronic load includes a second display module for displaying the voltage and load current at the output end of the lead-acid battery charger.

[0013] According to some embodiments of the present invention, the capacitances of the plurality of capacitors are not consistent.

[0014] According to some embodiments of the present invention, when the capacitance measuring switch is in a closed state, the electrical parameter measuring switch is in an open state; when the capacitance measuring switch is in an open state, the electrical parameter measuring switch is in a closed state.

[0015] According to some embodiments of the present invention, the further comprising:

[0016] A first temperature sensor, disposed inside the test circuit device, for detecting an average operating temperature of the test circuit device in a preset time period;

[0017] A second temperature sensor is arranged outside the test circuit device and is used to detect the average ambient temperature of the environment in which the test circuit device is located;

[0018] The first computing module is used for:

[0019] Calculate the actual wear life of the test circuit device within a preset time period based on the average operating temperature and the average ambient temperature;

[0020]

[0021] Where S is the actual wear life of the test circuit device within a preset time period; S 0 The standard wear life of the test circuit device within a preset time period; T 1 is the average operating temperature; T 2 is the average ambient temperature; T 0 Rated operating temperature for testing circuit devices;

[0022] Calculating a reliability coefficient of the test circuit device according to the actual wear life of the test circuit device within a preset time period;

[0023]

[0024] Wherein, L is the reliability coefficient of the test circuit device; e is a natural constant.

[0025] The alarm module is used to compare the reliability coefficient with the preset reliability coefficient, and issue an alarm prompt when it is determined that the reliability coefficient is less than the preset reliability coefficient.

[0026] According to some embodiments of the present invention, the further comprising:

[0027] The data detection module is used to detect whether the average operating temperature and average ambient temperature obtained are all valid data before the first calculation module calculates the actual loss life of the test circuit device within a preset time period based on the average operating temperature and the average ambient temperature. When it is determined that the average operating temperature or the average ambient temperature is invalid data, the first temperature sensor and the second temperature sensor are controlled to re-acquire the corresponding temperature data.

[0028] According to some embodiments of the present invention, the data detection module includes:

[0029] An acquisition module, used to acquire M temperature sensing data acquired by a first temperature sensor, where M is greater than or equal to 20; perform numerical processing on the M temperature sensing data, and form a vector A according to the numerically processed temperature sensing data;

[0030] The second calculation module is used to calculate the effective coefficient of the average operating temperature;

[0031]

[0032] Where D is the effective coefficient of vector A; A i is the i-th value of vector A, i=1,2,3…M; sum() is the sum operation;

[0033] The comparison module is used to compare the effective coefficient with the preset effective coefficient. When it is determined that the effective coefficient is greater than the preset effective coefficient, it means that the average operating temperature obtained based on the M temperature sensing data is valid data; otherwise, it means that the average operating temperature obtained based on the M temperature sensing data is invalid data.

[0034] According to some embodiments of the present invention, it also includes: a circuit line detection module, which is used to perform circuit line detection before testing the lead-acid battery charger, obtain detection information, and generate executable test instructions when it is determined that there is no abnormality based on the detection information.

[0035] The present invention proposes a test circuit device for the normal operation of a lead-acid battery charger, which can not only quickly configure resistors and capacitors required for the test circuit, but also meet different output voltage and current requirements of the charger, and can also save time costs, improve test efficiency, and avoid the risk of personal injury.

[0036] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0037] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0039] Figure 1 It is a circuit diagram of a battery charger for testing in the prior art;

[0040] Figure 2 is a circuit diagram of a testing circuit device for normal operation of a lead-acid battery charger according to an embodiment of the present invention;

[0041] Figure 3 1 is a physical diagram of a test circuit device for normal operation of a lead-acid battery charger according to an embodiment of the present invention.

[0042] Reference numerals: positive input terminal 1 , negative input terminal 2 , single-pole switch 3 , capacitance measuring switch 4 , capacitance measuring instrument 5 , electrical parameter measuring switch 6 , DC electronic load 7 . DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0044] like Figure 2-3 As shown, the embodiment of the present invention proposes a test circuit device for the normal operation of a lead-acid battery charger, comprising: a positive input terminal 1, a negative input terminal 2, a main power switch, an electrical parameter measurement switch 6, a capacitance measurement switch 4, a capacitance meter 5, a DC electronic load 7, a plurality of capacitors and a corresponding single-stage switch 3; wherein,

[0045] Positive input terminal 1, used to connect the positive pole of the output terminal of the lead-acid battery charger;

[0046] Negative input terminal 2, used to connect the negative pole of the output terminal of the lead-acid battery charger;

[0047] The main power switch is connected to the capacitance measuring instrument 5 and the DC electronic load 7;

[0048] The single-pole switch 3 is used to control the connection of the corresponding capacitor, one end of which is connected to the positive input terminal 1 and the other end is connected to the capacitor;

[0049] The capacitance measuring instrument 5 is connected in series with the capacitor, and a capacitance measuring switch 4 is arranged between the two;

[0050] One end of the electrical parameter measurement switch 6 is connected to the positive input terminal 1 and the negative input terminal 2 respectively, and the other end is connected to the DC electronic load 7 .

[0051] According to some embodiments of the present invention, the capacitance measuring instrument 5 includes a first display module for displaying the total capacitance of each capacitor connected to the test circuit.

[0052] According to some embodiments of the present invention, the DC electronic load 7 includes a second display module for displaying the voltage and load current at the output end of the lead-acid battery charger.

[0053] According to some embodiments of the present invention, the capacitances of the plurality of capacitors are not consistent.

[0054] According to some embodiments of the present invention, when the capacitance measuring switch 4 is in a closed state, the electrical parameter measuring switch 6 is in an open state; when the capacitance measuring switch 4 is in an open state, the electrical parameter measuring switch 6 is in a closed state.

[0055] The test method is: connect the test circuit device for the normal operation of the lead-acid battery charger to a 220V 50Hz power socket, turn on the main power switch, and at this time, the "DC electronic load 7" and the "capacitance tester" are in the power supply state. . Set the "electrical parameter measurement switch 6" to the "O" position, that is, the disconnected state, to avoid affecting the capacitance of the measured capacitor. Set the "capacitance measurement switch 4" to the "1" position, that is, the closed state, and then rotate the "capacitance tester" knob to adjust the knob to the appropriate capacitance measurement position. According to the pre-calculated required capacitance, open the single-pole switch of each capacitor as needed. The required capacitance is calculated as Among them, I τ is the rated DC output current, A; p is 1 for half-wave rectification and 2 for full-wave rectification; f is the power frequency, Hz; U τis the rated DC output voltage, V. At this time, the first display module of the "capacitance tester" will display the total capacitance of each capacitor connected to the circuit. By adjusting the combination of each capacitor (the capacity of each capacitor has corresponding specifications), the capacitance required for the test can be quickly reached. After adjusting to the capacitance required for the test, set the "capacitance measurement switch 4" to the "0" position. That is, the disconnected state. Turn on the power switch on the "DC electronic load 7" device surface, set the measurement mode to the "CR" mode, that is, the adjustment mode. During the measurement process, reset certain measurement parameters for new measurements. Pressing the "Preset" key can be used to quickly reset these parameters to the preset initial values. And adjusting the knob can quickly set the resistance required for the test. After the resistance setting is completed, press the "Preset" key again to exit the setting. Connect the positive and negative poles of the output terminals of the battery charger to the "positive input terminal 1" and "negative input terminal 2" of this device respectively, and then set the "electrical parameter measurement switch 6" to the "1" position, that is, the closed state. Connect the battery charger to the power supply voltage and frequency required for the test. At this time, the "DC electronic load 7" will display the output voltage of the output terminal of the battery charger. Press the "Load" button on the "DC electronic load 7" panel, and the battery charger will work normally. At the same time, the "DC electronic load 7" display panel will display the voltage and load current at the output end of the battery charger.

[0056] The beneficial effects of the above technical solution are: it can not only quickly configure the resistors and capacitors required for the test circuit, but also meet the different output voltage and current requirements of the charger, and it can also save time costs, improve test efficiency, and avoid the risk of personal injury.

[0057] According to some embodiments of the present invention, the further comprising:

[0058] A first temperature sensor, disposed inside the test circuit device, for detecting an average operating temperature of the test circuit device in a preset time period;

[0059] A second temperature sensor is arranged outside the test circuit device and is used to detect the average ambient temperature of the environment in which the test circuit device is located;

[0060] The first computing module is used for:

[0061] Calculate the actual wear life of the test circuit device within a preset time period based on the average operating temperature and the average ambient temperature;

[0062]

[0063] Where S is the actual wear life of the test circuit device within a preset time period; S 0 The standard wear life of the test circuit device within a preset time period; T1 is the average operating temperature; S 2 is the average ambient temperature; T 0 Rated operating temperature for testing circuit devices;

[0064] Calculating a reliability coefficient of the test circuit device according to the actual wear life of the test circuit device within a preset time period;

[0065]

[0066] Wherein, L is the reliability coefficient of the test circuit device; e is a natural constant.

[0067] The alarm module is used to compare the reliability coefficient with the preset reliability coefficient, and issue an alarm prompt when it is determined that the reliability coefficient is less than the preset reliability coefficient.

[0068] The working principle and beneficial effects of the above technical solution are as follows: the first temperature sensor is arranged inside the test circuit device to detect the average working temperature of the test circuit device in a preset time period; the second temperature sensor is arranged outside the test circuit device to detect the average ambient temperature of the environment in which the test circuit device is located; according to the average working temperature and the average ambient temperature, the actual loss life of the test circuit device in the preset time period is calculated, and this formula takes into account the influence of the difference between the working temperature and the ambient temperature on the loss life. According to the actual loss life of the test circuit device in the preset time period, the reliability coefficient of the test circuit device is calculated, and the reliability coefficient is an indicator to measure the reliable operation ability of the equipment under given conditions. The alarm module compares the calculated reliability coefficient (L) with the preset reliability coefficient. If the reliability coefficient is less than the preset value, the alarm module will issue an alarm prompt, indicating that the reliability of the test circuit device may be insufficient and further inspection or maintenance is required. By real-time monitoring of temperature and calculating loss life and reliability coefficient, an effective monitoring and early warning mechanism is provided for the operating status of the test circuit device.

[0069] According to some embodiments of the present invention, the further comprising:

[0070] The data detection module is used to detect whether the average operating temperature and average ambient temperature obtained are all valid data before the first calculation module calculates the actual loss life of the test circuit device within a preset time period based on the average operating temperature and the average ambient temperature. When it is determined that the average operating temperature or the average ambient temperature is invalid data, the first temperature sensor and the second temperature sensor are controlled to re-acquire the corresponding temperature data.

[0071] The working principle and beneficial effects of the above technical solution: In order to ensure the accuracy of calculating the loss life and reliability coefficient, it is necessary to judge the validity of the acquired data. If it is found that either the average operating temperature or the average ambient temperature is invalid data, the data detection module will perform the following operations: notify the first temperature sensor or the second temperature sensor (or both, if both data are invalid) to reacquire the temperature data. If both the average operating temperature and the average ambient temperature are verified as valid data, the data detection module will pass these data to the first calculation module for calculation of the actual loss life. By adding the data detection module, the accuracy and reliability of the test circuit device monitoring system are improved. This helps to reduce erroneous calculations caused by invalid data and ensures that the system can evaluate the operating status of the test circuit device based on accurate information.

[0072] According to some embodiments of the present invention, the data detection module includes:

[0073] An acquisition module, used to acquire M temperature sensing data acquired by a first temperature sensor, where M is greater than or equal to 20; perform numerical processing on the M temperature sensing data, and form a vector A according to the numerically processed temperature sensing data;

[0074] The second calculation module is used to calculate the effective coefficient of the average operating temperature;

[0075]

[0076] Where D is the effective coefficient of vector A; A i is the i-th value of vector A, i=1,2,3…M; sum() is the sum operation;

[0077] The comparison module is used to compare the effective coefficient with the preset effective coefficient. When it is determined that the effective coefficient is greater than the preset effective coefficient, it means that the average operating temperature obtained based on the M temperature sensing data is valid data; otherwise, it means that the average operating temperature obtained based on the M temperature sensing data is invalid data.

[0078] The working principle and beneficial effects of the above technical solution: The stability or periodicity of the data is evaluated by comparing the sum of 10 consecutive subsequences in vector A with the sum of the 10 elements after or before them. For each position i in vector A (from 1 to M-9), it calculates a "local effective coefficient", which is the ratio of the sum of 10 consecutive elements to the sum of the next 10 elements. Take the sum of the absolute values ​​of all these local effective coefficients and divide it by a factor related to M. The final effective coefficient D reflects a certain "stability" or "consistency" of the data in vector A. The comparison module uses this effective coefficient D to compare with the preset effective coefficient. If D is greater than the preset value, the average operating temperature obtained based on M temperature sensing data is considered to be valid data; otherwise, it is invalid data. It is convenient to accurately judge whether the acquired data is valid.

[0079] According to some embodiments of the present invention, it also includes: a circuit line detection module, which is used to perform circuit line detection before testing the lead-acid battery charger, obtain detection information, and generate executable test instructions when it is determined that there is no abnormality based on the detection information.

[0080] The working principle and beneficial effects of the above technical solution: The circuit line detection module is first initialized and the preset detection parameters and thresholds are loaded. Configure the interface connected to the charger to ensure the stability and accuracy of signal transmission. Check whether the physical connection between the charger and the test system is firm, including power cord, signal cord, etc. Verify the integrity of the connecting wires and eliminate any possible damage or poor contact. Perform insulation resistance tests, short circuit and open circuit detection, and voltage and current detection to comprehensively evaluate whether there are any abnormalities in the circuit line. When it is determined that there are no abnormalities based on the detection information, an executable test instruction is generated to ensure the accuracy and reliability of the test results.

[0081] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A test circuit device for the normal operation of a lead-acid battery charger, characterized in that: include: Positive input terminal, negative input terminal, main power switch, electrical parameter measurement switch, capacitance measurement switch, capacitance measuring instrument, DC electronic load, several capacitors and corresponding single-stage switches; wherein, A positive input terminal, used to connect the positive terminal of the output terminal of the lead-acid battery charger; Negative input terminal, used to connect the negative pole of the output terminal of the lead-acid battery charger; The main power switch is connected to a capacitance measuring instrument and a DC electronic load; The single-pole switch is used to control the connection of the corresponding capacitor, one end of which is connected to the positive input terminal and the other end of which is connected to the capacitor; The capacitance measuring instrument is connected in series with the capacitor, and a capacitance measuring switch is arranged between the two; One end of the electrical parameter measurement switch is connected to the positive input terminal and the negative input terminal respectively, and the other end is connected to the DC electronic load.

2. The test circuit device for the normal operation of a lead-acid battery charger as claimed in claim 1, characterized in that: The capacitance measuring instrument comprises a first display module for displaying the total capacitance of each capacitor connected to the test circuit.

3. The test circuit device for the normal operation of a lead-acid battery charger as claimed in claim 1, characterized in that: The DC electronic load includes a second display module for displaying the voltage and load current at the output end of the lead-acid battery charger.

4. The test circuit device for the normal operation of a lead-acid battery charger as claimed in claim 1, characterized in that: The capacitances of several capacitors are not consistent.

5. The test circuit device for the normal operation of a lead-acid battery charger as claimed in claim 1, characterized in that: When the capacitance measurement switch is in a closed state, the electrical parameter measurement switch is in an open state; when the capacitance measurement switch is in an open state, the electrical parameter measurement switch is in a closed state.

6. The test circuit device for the normal operation of a lead-acid battery charger as claimed in claim 1, characterized in that: Also includes: A first temperature sensor, disposed inside the test circuit device, for detecting an average operating temperature of the test circuit device in a preset time period; A second temperature sensor is arranged outside the test circuit device and is used to detect the average ambient temperature of the environment in which the test circuit device is located; The first computing module is used for: Calculate the actual wear life of the test circuit device within a preset time period based on the average operating temperature and the average ambient temperature; Wherein, S is the actual loss life of the test circuit device within a preset time period; S0 is the standard loss life of the test circuit device within a preset time period; T1 is the average operating temperature; T2 is the average ambient temperature; T0 is the rated operating temperature of the test circuit device; Calculating a reliability coefficient of the test circuit device according to the actual wear life of the test circuit device within a preset time period; Wherein, L is the reliability coefficient of the test circuit device; e is a natural constant; The alarm module is used to compare the reliability coefficient with the preset reliability coefficient, and issue an alarm prompt when it is determined that the reliability coefficient is less than the preset reliability coefficient.

7. The test circuit device for the normal operation of a lead-acid battery charger as claimed in claim 6, characterized in that: Also includes: The data detection module is used to detect whether the average operating temperature and average ambient temperature obtained are all valid data before the first calculation module calculates the actual loss life of the test circuit device within a preset time period based on the average operating temperature and the average ambient temperature. When it is determined that the average operating temperature or the average ambient temperature is invalid data, the first temperature sensor and the second temperature sensor are controlled to re-acquire the corresponding temperature data.

8. The test circuit device for normal operation of a lead-acid battery charger as claimed in claim 7, characterized in that: The data detection module comprises: An acquisition module, used to acquire M temperature sensing data acquired by a first temperature sensor, where M is greater than or equal to 20; perform numerical processing on the M temperature sensing data, and form a vector A according to the numerically processed temperature sensing data; The second calculation module is used to calculate the effective coefficient of the average operating temperature; Where D is the effective coefficient of vector A; A i is the i-th value of vector A, i=1,2,3…M; sum() is the sum operation; The comparison module is used to compare the effective coefficient with the preset effective coefficient. When it is determined that the effective coefficient is greater than the preset effective coefficient, it means that the average operating temperature obtained based on the M temperature sensing data is valid data; otherwise, it means that the average operating temperature obtained based on the M temperature sensing data is invalid data.

9. The test circuit device for the normal operation of a lead-acid battery charger as claimed in claim 1, characterized in that: Also includes: The circuit line detection module is used to perform circuit line detection before testing the lead-acid battery charger, obtain detection information, and generate executable test instructions when it is determined that there is no abnormality based on the detection information.

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