Matched device for calibrating cylindrical battery charging and discharging tester and calibration method

Abstract

The invention belongs to the technical field of instrument calibration equipment, and provides a matching device for calibrating a cylindrical battery charging and discharging tester and a calibration method. Comprising an upper copper wafer, an upper-end anode wiring terminal, an upper-end insulator, a lower-end insulating sleeve, a compression spring, a lower-end cathode wiring terminal and a lower copper wafer, and the upper-end insulator is arranged at the top of the lower-end insulating sleeve in a sliding manner. The matching device and the calibration method are suitable for calibration work of the cylindrical battery charging and discharging tester, data reading is stable in calibration, contact points are firm, mounting and dismounting are easy, calibration of a multi-channel battery charging and discharging tester is particularly convenient, wiring time is greatly saved, and reading stability and reliability are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of instrument calibration equipment, and specifically is a matching device and a calibration method for calibrating a cylindrical battery charge and discharge tester. Background Art

[0002] According to the JJF2039-2023 battery charge and discharge tester calibration specification and JJG (military industry) 108-2015 battery charge and discharge tester calibration specification, constant current charge and discharge current indication error calibration and constant voltage charge and discharge voltage indication error calibration are carried out.

[0003] Constant current charge and discharge current indication error calibration:

[0004] according to Figure 2 wiring;

[0005] Select the calibration points according to the corresponding items;

[0006] Set the battery charge and discharge tester to constant current charging mode, and set the charging current value I0 according to the calibration point;

[0007] Set the charging termination voltage V of the battery charge and discharge tester to be calibrated to be greater than the positive and negative terminal voltages of the battery simulation device or battery pack, so that the battery charge and discharge tester to be calibrated does not stop working during the calibration process;

[0008] Connect the battery simulation device or battery pack, pneumatically operate the battery charge and discharge tester to be calibrated, and after the charging current stabilizes, record the DC current measuring instrument reading I1 and the setting value I2 and measured value I3 of the charging current of the battery charge and discharge tester to be calibrated;

[0009] The constant current charging current setting value indication error is calculated as follows:

[0010] ΔI=I0-I1(1)

[0011] The constant current charging current measurement value indication error is calculated as follows:

[0012] ΔI=I3-I1(2)

[0013] Constant voltage charging voltage indication error calibration:

[0014] In constant voltage charging mode, the calibration method for voltage setting value adopts standard meter method; the calibration methods for voltage measurement value include standard meter method and standard source method. For example, the standard meter method is used to calibrate the indication error of constant voltage charging voltage setting value and measurement value;

[0015] according to Figure 2 Connect the wires; select the calibration point according to the corresponding item;

[0016] Set the battery charge and discharge tester to constant voltage charging mode, and set the charging voltage value V according to the calibration point.S ;

[0017] Set the charging current value of the battery simulation device or battery pack to be greater than the charging termination current I of the battery charge and discharge tester being calibrated. e , so that the battery charge and discharge tester being calibrated does not stop working during the calibration process;

[0018] First, connect the battery simulation device or battery pack, then start the battery charge and discharge tester to be calibrated. After the charging voltage stabilizes, record the DC digital voltmeter reading V and the setting value V of the charging voltage of the battery charge and discharge tester to be calibrated. s and the measured value V R ;

[0019] The constant voltage charging voltage setting value indication error is calculated as follows:

[0020] ΔV S =V S -V0

[0021] The constant voltage charging voltage measurement indication error is calculated as follows:

[0022] ΔV R =V R -V0

[0023] When calibrating the constant current charge and discharge current and constant voltage charge and discharge voltage parameters, the tester needs to connect the standard ammeter in series in the circuit and the standard voltmeter in parallel in the circuit while performing charge and discharge tests on cylindrical batteries. Because the current tester uses a cylindrical battery fixture, the positive and negative poles of the fixture directly clamp the cylindrical battery in the loop, and the voltage sampling line is on the fixture, the contact point is small, the stroke is short, and it cannot be fixed. When the tester performs charge and discharge tests on cylindrical batteries, it is impossible to connect the standard ammeter in series and the standard voltmeter in parallel. If a clamp ammeter is used to measure the loop current, the accuracy level of the clamp ammeter is too low to meet the requirements of the regulations; if an alligator clip is clamped on the battery fixture to measure the voltage parameters, the limited space and unstable contact points will cause inaccurate voltage readings and easy fluctuations, affecting the calibration of the tester's voltage parameters. Summary of the invention

[0024] In order to overcome the wiring shortcomings in the process of calibrating the tester, the inventor designed a supporting device for calibrating the cylindrical battery charge and discharge tester, which can simplify the wiring process and has firm and stable wiring. Without affecting the normal charging and discharging of the tester, the constant current charging and discharging current and constant voltage charging and discharging voltage parameters of the tester can be calibrated.

[0025] In order to achieve its purpose, the technical solution adopted by the present invention is to design a matching device for calibrating a cylindrical battery charge and discharge tester, including an upper copper disc, an upper positive terminal, an upper insulator, a lower insulating sleeve, a compression spring, a lower negative terminal, and a lower copper disc; the upper insulator is slidably arranged on the top of the lower insulating sleeve, a limit block is arranged at the bottom of the upper insulator, the compression spring is arranged inside the lower insulating sleeve, and the two ends of the compression spring are respectively connected to the upper insulator and the lower insulating sleeve; the upper copper disc is arranged on the top of the upper insulator, the upper positive terminal is arranged between the upper copper disc and the upper insulator, and is electrically connected to the upper copper disc; the lower copper disc is arranged at the bottom of the lower insulating sleeve, the lower negative terminal is arranged between the lower insulating sleeve and the lower copper disc, and is electrically connected to the lower copper disc.

[0026] Furthermore, the centers of the upper copper disc and the lower copper disc are provided with concave points.

[0027] Furthermore, the lower end insulating sleeve includes an upper section and a lower section, and the upper section is connected to the lower section by threads.

[0028] Furthermore, the upper positive terminal and the lower negative terminal both include copper terminals and one-to-two test holes, and the one-to-two test holes are electrically connected to the copper terminals.

[0029] In addition, the invention also proposes a calibration method for a supporting device of a cylindrical battery charge and discharge tester, which is characterized in that it includes the following steps: when calibrating the constant current charge and discharge current indication error of the tester, the supporting device is clamped on the universal fixture of the tester, that is, the upper copper disc and the lower copper disc are respectively in contact with the positive and negative electrodes of the universal fixture, the positive terminal at the upper end of the supporting device is connected to the positive electrode of the battery simulation device or the battery pack, the negative electrode of the battery simulation device or the battery pack is connected to the positive electrode of the DC standard ammeter, and the negative electrode of the standard ammeter is connected to the negative terminal at the lower end of the supporting device. The tester performs constant current charging and discharging. The charging current enters the positive electrode of the battery simulation device or battery pack through the positive terminal at the upper end of the supporting device, and then enters the positive electrode of the standard ammeter from the negative terminal of the battery simulation device or battery pack, and then returns to the negative terminal at the lower end of the supporting device from the negative terminal of the standard ammeter. The value of the standard ammeter and the current setting value and display value on the tester are read, and the current error is calculated according to formulas (1) and (2). That is, the constant current charging current setting value indication error is calculated as follows: (1) ΔI = I0-I1; the constant current charging current measurement value indication error is calculated as follows: (2) ΔI = I3-I1;

[0030] When calibrating the constant voltage charge and discharge voltage indication error of the tester, clamp the supporting device on the universal fixture of the tester, connect the positive terminal of the upper end of the supporting device to the positive terminal of the battery simulation device or battery pack, and connect the negative terminal of the battery simulation device or battery pack to the negative terminal of the lower end of the supporting device; connect the positive terminal of the standard voltmeter to the positive terminal of the battery simulation device, and connect the negative terminal of the standard voltmeter to the negative terminal of the battery simulation device. During calibration, the tester performs constant voltage charge and discharge, reads the value of the standard voltmeter and the setting value and display value of the tester, and calculates the voltage error according to formulas (3) and (4), that is, the constant voltage charging voltage setting value indication error is calculated as follows: (3)ΔV S =V S -V0; The constant voltage charging voltage measurement value indication error is calculated as follows: (4)ΔV R =V R -V0.

[0031] The invention adopts the above technical solution. The supporting device and calibration method are suitable for the calibration of cylindrical battery charge and discharge testers. The data reading during calibration is stable, the contact points are firm, and it is easy to install and remove. It is particularly convenient when calibrating battery charge and discharge testers with more channels, which greatly saves wiring time and improves reading stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is the calibration principle diagram of the constant current charge and discharge current indication error and constant voltage charge and discharge voltage indication error of the battery charge and discharge tester;

[0034] Figure 3 A working principle diagram created for the present invention;

[0035] Figure 4 It is a schematic structural diagram of the upper insulator in the present invention. DETAILED DESCRIPTION

[0036] See also Figure 1-4, a matching device for calibrating a cylindrical battery charge and discharge tester, comprising an upper copper disc 1, an upper positive terminal 3, an upper insulator 4-1, a lower insulating sleeve, a compression spring 6, a lower negative terminal 7, and a lower copper disc 8; the upper insulator 4-1 is slidably arranged on the top of the lower insulating sleeve, a limit block 4-2 is arranged at the bottom of the upper insulator 4-1, the compression spring 6 is arranged inside the lower insulating sleeve, and the two ends of the compression spring 6 are respectively connected to the upper insulator 4-1 and the lower insulating sleeve; the upper copper disc 1 is arranged on the top of the upper insulator 4-1, the upper positive terminal 3 is arranged between the upper copper disc 1 and the upper insulator 4-1, and is electrically connected to the upper copper disc 1; the lower copper disc 8 is arranged at the bottom of the lower insulating sleeve, the lower negative terminal 7 is arranged between the lower insulating sleeve and the lower copper disc 8, and is electrically connected to the lower copper disc 8.

[0037] Furthermore, the centers of the upper copper disc 1 and the lower copper disc 8 are provided with concave points 2 and 9, so as to better contact with the electrodes of the universal fixture and prevent poor conduction.

[0038] Furthermore, the lower insulating sleeve includes an upper and lower section 5-1 and 5-2, and the upper section 5-1 and the lower section 5-2 are connected by threads. The purpose is to facilitate quick disassembly, maintenance and replacement of the compression spring 6. The upper and lower sections 5-1 and 5-2 are threadedly connected to form the lower insulating sleeve, and the compression spring 6 is enclosed inside the lower insulating sleeve. The upper insulator 4-1 is installed into the lower insulating sleeve together with the limit block 4-2. The limit block 4-2 prevents the upper insulator 4-1 from falling out from the top of the lower insulating sleeve. Specifically, the outer wall of the lower section 5-2 is provided with an external thread, and the inner wall of the upper section 5-1 is provided with an internal thread, and the internal and external threads match.

[0039] Furthermore, the upper positive terminal 3 and the lower negative terminal 7 both include copper terminals and one-to-two test holes, and the one-to-two test holes are electrically connected to the copper terminals. The upper copper disc 1 is soldered to the copper terminals of the upper positive terminal 3, and the copper terminals of the upper positive terminal 3 are bonded to the upper insulator 4-1. The one-to-two test holes can simultaneously connect the current and voltage test lines, and are more stable. The copper terminals of the lower negative terminal 7 are soldered to the lower copper disc 8, and the copper terminals of the lower negative terminal 7 are bonded to the bottom of the lower insulating sleeve.

[0040] In addition, see Figure 3The invention also proposes a calibration method for a supporting device of a cylindrical battery charge and discharge tester, comprising the following steps: when calibrating the constant current charge and discharge current indication error of the tester, the supporting device is clamped on the universal fixture of the tester, that is, the upper copper disc 1 and the lower copper disc 9 are respectively in contact with the positive and negative electrodes of the universal fixture, the positive terminal 3 at the upper end of the supporting device is connected to the positive electrode of the battery simulation device or the battery pack, the negative electrode of the battery simulation device or the battery pack is connected to the positive electrode of the DC standard ammeter, and the negative electrode of the standard ammeter is connected to the negative terminal 7 at the lower end of the supporting device. When calibrating the tester Perform constant current charging and discharging. The charging current enters the positive electrode of the battery simulation device or battery pack through the positive electrode terminal 3 at the upper end of the matching device, and then enters the positive electrode of the standard ammeter from the negative electrode of the battery simulation device or battery pack, and then returns to the negative electrode terminal 7 at the lower end of the matching device from the negative electrode of the standard ammeter. Read the value of the standard ammeter and the current setting value and display value on the tester. Calculate the current error according to formulas (1) and (2), that is, the constant current charging current setting value indication error is calculated as follows: (1) ΔI = I0-I1; the constant current charging current measurement value indication error is calculated as follows: (2) ΔI = I3-I1;

[0041] When calibrating the constant voltage charge and discharge voltage indication error of the tester, the supporting device is clamped on the universal fixture of the tester, and the positive terminal 3 at the upper end of the supporting device is connected to the positive terminal of the battery simulation device or the battery pack, and the negative terminal of the battery simulation device or the battery pack is connected to the negative terminal 7 at the lower end of the supporting device; the positive terminal of the standard voltmeter is connected to the positive terminal of the battery simulation device, and the negative terminal of the standard voltmeter is connected to the negative terminal of the battery simulation device. During calibration, the tester performs constant voltage charge and discharge, reads the value of the standard voltmeter and the setting value and display value of the tester, and calculates the voltage error according to formulas (3) and (4), that is, the constant voltage charging voltage setting value indication error is calculated as follows: (3)ΔV S =V S -V0; The constant voltage charging voltage measurement value indication error is calculated as follows: (4)ΔV R =V R -V0.

[0042] The invention adopts the above technical solution. The supporting device and calibration method are suitable for the calibration of cylindrical battery charge and discharge testers. The data reading during calibration is stable, the contact points are firm, and it is easy to install and remove. It is particularly convenient when calibrating battery charge and discharge testers with more channels, which greatly saves wiring time and improves reading stability and reliability.

[0043] Although the present invention is described in detail above, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention and without departing from the purpose of the present invention, those skilled in the art can also make many variations, which all fall within the protection of the present invention.

Claims

1. A supporting device for calibrating a cylindrical battery charge and discharge tester, characterized in that: It includes an upper copper disc, an upper positive terminal, an upper insulator, a lower insulating sleeve, a compression spring, a lower negative terminal, and a lower copper disc; the upper insulator is slidably arranged on the top of the lower insulating sleeve, a limit block is arranged at the bottom of the upper insulator, the compression spring is arranged inside the lower insulating sleeve, and the two ends of the compression spring are respectively connected to the upper insulator and the lower insulating sleeve; the upper copper disc is arranged on the top of the upper insulator, the upper positive terminal is arranged between the upper copper disc and the upper insulator, and is electrically connected to the upper copper disc; the lower copper disc is arranged at the bottom of the lower insulating sleeve, the lower negative terminal is arranged between the lower insulating sleeve and the lower copper disc, and is electrically connected to the lower copper disc.

2. The supporting device for calibrating a cylindrical battery charge and discharge tester as claimed in claim 1, characterized in that: Concave points are arranged at the centers of the upper copper disc and the lower copper disc.

3. The supporting device for calibrating a cylindrical battery charge and discharge tester as claimed in claim 1, characterized in that: The lower end insulating sleeve comprises an upper section and a lower section, and the upper section is connected with the lower section by threads.

4. The supporting device for calibrating a cylindrical battery charge and discharge tester as claimed in claim 1, characterized in that: The upper positive terminal and the lower terminal both include copper terminals and one-to-two test holes, and the one-to-two test holes are electrically connected to the copper terminals.

5. The calibration method of a supporting device for calibrating a cylindrical battery charge and discharge tester according to claim 1, characterized in that: The following steps are involved: When calibrating the current indication error of the constant current charge and discharge tester, the supporting device is clamped on the universal fixture of the tester, that is, the upper copper disc and the lower copper disc are respectively in contact with the positive and negative electrodes of the universal fixture, the positive terminal at the upper end of the supporting device is connected to the positive electrode of the battery simulation device or the battery pack, the negative electrode of the battery simulation device or the battery pack is connected to the positive electrode of the DC standard ammeter, and the negative electrode of the standard ammeter is connected to the negative terminal at the lower end of the supporting device. During calibration, the tester performs constant current charge and discharge, and the charging current is connected to the positive electrode at the upper end of the supporting device. The terminal enters the positive pole of the battery simulation device or battery pack, and then enters the positive pole of the standard ammeter from the negative pole of the battery simulation device or battery pack, and then returns from the negative pole of the standard ammeter to the negative pole terminal at the lower end of the supporting device, reads the value of the standard ammeter and the current setting value and display value on the tester, and calculates the current error according to formulas (1) and (2), that is, the constant current charging current setting value indication error is calculated as follows: (1) ΔI = I0-I1; the constant current charging current measurement value indication error is calculated as follows: (2) ΔI = I3-I1; When calibrating the constant voltage charge and discharge voltage indication error of the tester, clamp the supporting device on the universal fixture of the tester, connect the positive terminal of the upper end of the supporting device to the positive terminal of the battery simulation device or battery pack, and connect the negative terminal of the battery simulation device or battery pack to the negative terminal of the lower end of the supporting device; connect the positive terminal of the standard voltmeter to the positive terminal of the battery simulation device, and connect the negative terminal of the standard voltmeter to the negative terminal of the battery simulation device. During calibration, the tester performs constant voltage charge and discharge, reads the value of the standard voltmeter and the setting value and display value of the tester, and calculates the voltage error according to formulas (3) and (4). That is, the constant voltage charging voltage setting value indication error is calculated as follows: (3)ΔV S =V S -V0; The constant voltage charging voltage measurement value indication error is calculated as follows: (4) ΔV R =V R -V0.

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