Detection device and detection method of portable battery charge and discharge tester

Abstract

The detection device and detection method of a portable battery charge and discharge tester include components such as a battery pack, a digital DC voltmeter, a DC shunt, a DC circuit breaker, a timer and a panel. A DC shunt and a DC circuit breaker are connected in series on the current circuit of the battery charge and discharge tester, and a digital DC voltmeter is connected in parallel to the voltage collection end of the battery charge and discharge tester. The device can ensure the accuracy and reliability of the DC voltage value, DC current value and charge and discharge time of the battery charge and discharge tester when it is working. It is also portable and easy to carry, which can well meet the needs of on-site testing.

Description

Technical Field

[0001] The invention relates to the field of battery charging and discharging, in particular to a detection device and a detection method of a portable battery charging and discharging tester. Background Art

[0002] The principle of the detection device of the existing battery charge and discharge tester is to simulate the discharge of the battery pack. The detection device of the battery charge and discharge tester acts as a source with a strong load capacity, outputs voltage and current to the battery charge and discharge tester, and the battery charge and discharge tester acts as a load. Because the device simulates the discharge of the battery, it cannot detect the charging function of the battery charge and discharge tester. Summary of the invention

[0003] The purpose of the present invention is to provide a detection device and a detection method for a portable battery charge and discharge tester, which can monitor the DC voltage and DC current value of the system in real time, and can also monitor the charge and discharge time of the battery pack, as well as the DC current protection.

[0004] To achieve the above object, the technical solution of the present invention is: a detection device of a portable battery charge and discharge tester, the components of which include a battery pack, a first digital DC voltmeter, a DC shunt, a DC circuit breaker, a timer, a second digital DC voltmeter, a battery charge and discharge tester and a panel, characterized in that the specific structure and connection relationship of the components are as follows:

[0005] The first digital DC voltmeter, DC shunt, DC circuit breaker, timer, and second digital DC voltmeter are installed on a panel. The panel is provided with current access terminals of a battery charge and discharge tester and current access terminals of a battery pack. A DC shunt and a DC circuit breaker are connected in series between the positive end of the current access terminal of the battery charge and discharge tester and the positive end of the current access terminal of the battery pack. The first digital DC voltmeter is connected in parallel to the positive and negative ends of the current of the battery charge and discharge tester, the second digital DC voltmeter is connected in parallel to the two ends of the DC shunt, and the voltage acquisition line of the battery charge and discharge tester is also connected in parallel to the positive and negative ends of the current of the battery charge and discharge tester.

[0006] The positive end and the negative end of the battery pack current access terminal on the panel are connected to the positive end and the negative end of the battery pack respectively.

[0007] The positive end and the negative end of the current access terminal of the battery charge and discharge tester on the panel are respectively connected to the positive current terminal and the negative current terminal of the battery charge and discharge tester.

[0008] The detection method of the detection device of the portable battery charge and discharge tester, which can detect the charging and discharging functions of the battery charge and discharge tester, comprises the following steps:

[0009] Detect charging function:

[0010] ⑴Connect the circuit: turn the DC circuit breaker to the OFF position and connect the equipment according to the connection diagram;

[0011] ⑵ Turn on the battery charge and discharge tester and turn the DC circuit breaker to the ON position;

[0012] ⑶ Enter the setting interface of the battery charge and discharge tester, set the terminal voltage upper limit of the battery pack, set the charging current, charging time and other parameters, save and exit;

[0013] ⑷ Enter the charging interface of the battery charge and discharge tester, click OK to start charging;

[0014] (5) The charging interface of the battery charge and discharge tester displays the DC current value of the charging, the DC voltage value of the battery pack, and the charging time value. The charging current flows through the detection device of the portable battery charge and discharge tester, and the terminal voltage of the battery pack is displayed on the digital DC voltmeter. After the DC current flows through the DC shunt, a DC voltage will be generated in the DC shunt, and the voltage is displayed on the digital DC voltmeter. The DC current value can be calculated by the voltage value. When the charging current reaches the set value, press the timer to record the charging time. In this way, the detection device of the portable battery charge and discharge tester will obtain the terminal voltage value of the battery pack, the charging current value of the battery charge and discharge tester, and the charging time. The battery charge and discharge tester also displays the terminal voltage value of the battery pack, the charging current value of the battery charge and discharge tester, and the charging time value. The two sets of data can be compared;

[0015] Detection of discharge function:

[0016] ⑴Connect the circuit: turn the DC circuit breaker to the OFF position and connect the equipment according to the connection diagram;

[0017] ⑵ Turn on the battery charge and discharge tester and turn the DC circuit breaker to the ON position;

[0018] ⑶ Enter the setting interface of the battery charge and discharge tester, set the upper and lower limits of the terminal voltage of the battery pack, set the discharge current, discharge time and other parameters, save and exit;

[0019] ⑷ Enter the discharge interface of the battery charge and discharge tester, click OK to start discharging;

[0020] ⑸ The discharge interface of the battery charge and discharge tester displays the DC current value of the discharge, the DC voltage value of the battery pack, and the discharge time value. The discharge current flows through the detection device of the portable battery charge and discharge tester, and the terminal voltage of the battery pack is displayed on the digital DC voltmeter. After the DC current flows through the DC shunt, a DC voltage will be generated in the DC shunt, and the voltage is displayed on the digital DC voltmeter. The DC current value can be calculated by the voltage value. When the discharge current reaches the set value, press the timer to record the discharge time to obtain the battery pack terminal voltage value, the battery pack discharge current value and the discharge time. The battery pack terminal voltage value, the battery pack discharge current value and the discharge time value are also displayed on the discharge interface of the battery charge and discharge tester. The two sets of data can be compared. Data processing:

[0021]

[0022] Where: γ is the relative error of the DC current or DC voltage of the battery charge and discharge tester under test;

[0023] χ N ——The displayed value of DC current or DC voltage of the battery charge and discharge tester;

[0024] χ0——the converted value of DC current or the displayed value of DC voltage of the detection device of the portable battery charge and discharge tester,

[0025] The relative error of DC current or DC voltage calculated by the above formula can be used to determine the accuracy level of the battery charge and discharge tester.

[0026] The detection method of the detection device of the portable battery charge and discharge tester, when detecting the charging function: the battery charge and discharge tester is used as the source, and the battery pack is used as the load. At this time, the battery charge and discharge tester outputs voltage and current to the battery pack, and the magnitude of the voltage and current is the voltage and current display value of the "charging" interface of the battery charge and discharge tester.

[0027] The detection method of the detection device of the portable battery charge and discharge tester, when detecting the discharge function: the battery charge and discharge tester is used as a load, and the battery pack is used as a source. At this time, the battery pack outputs voltage and current to the battery charge and discharge tester, and the magnitude of the voltage and current is the voltage and current display value of the "discharge" interface of the battery charge and discharge tester.

[0028] The outstanding advantages of the present invention are:

[0029] 1. The device is simple to trace the source. It only needs to trace the source of the monitored digital DC voltmeter, DC shunt and timer to ensure the accuracy and reliability of the voltage value, current value and charge and discharge time when the battery charge and discharge tester is working.

[0030] 2. It can detect the charging and discharging functions of the battery charge and discharge tester. The device uses a battery pack as a load and can be used for battery charge and discharge testers with different voltage values ​​by adjusting the number of battery packs.

[0031] 3. It is easy to carry, movable, and has low production cost. It can well meet the needs of on-site testing of battery charge and discharge testers and is of great significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a planar block diagram of a detection device of a portable battery charge and discharge tester.

[0033] The figures are marked as: battery pack 1, first digital DC voltmeter 2, DC shunt 3, DC circuit breaker 4, timer 5, second digital DC voltmeter 6, battery charge and discharge tester 7, and panel 8. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments:

[0035] like Figure 1 As shown, the portable battery charge and discharge tester detection device of the present invention comprises components including a battery pack 1, a first digital DC voltmeter 2, a DC shunt 3, a DC circuit breaker 4, a timer 5, a second digital DC voltmeter 6, a battery charge and discharge tester 7 and a panel 8. The specific structure and connection relationship of the components are as follows:

[0036] The terminal on the left side of the panel 8 is the current access terminal of the battery pack 1, and the terminal on the right side of the panel 8 is the current access terminal of the battery charge and discharge tester 7; the positive current terminal of the battery charge and discharge tester 7 is connected to the positive current terminal of the battery charge and discharge tester 7 on the panel 8, the positive current terminal of the battery charge and discharge tester 7 on the panel 8 is connected to one end of the DC circuit breaker 4, the other end of the DC circuit breaker 4 is connected to one end of the DC shunt 3, the other end of the DC shunt 3 is connected to the positive current terminal of the battery pack 1 on the panel 8, the positive current terminal of the battery pack 1 on the panel 8 is connected to the positive end of the battery pack 1; the negative end of the battery pack 1 is connected to the panel 8 battery pack The negative end of the battery group 1 current, the negative end of the battery group 1 current of the panel 8 is connected to the negative terminal of the battery charge and discharge tester 7 of the panel 8, and the negative terminal of the battery charge and discharge tester 7 of the panel 8 is connected to the negative end of the current of the battery charge and discharge tester 7; the second digital DC voltmeter 6 is connected in parallel to both ends of the DC shunt 3; the first digital DC voltmeter 2 is connected in parallel to the positive and negative ends of the current of the battery charge and discharge tester 7 of the panel 8; the voltage acquisition line of the battery charge and discharge tester 7 is also connected in parallel to the positive and negative ends of the current of the battery charge and discharge tester 7 of the panel 8; the timer 5 is fixed on the panel, and the timer is manually started after the charging or discharging current reaches the set value.

[0037] The DC shunt 3 adopts a standard DC resistor.

[0038] Working principle and detection method

[0039] The detection device of the portable battery charge and discharge tester can detect the charging and discharging functions of the battery charge and discharge tester.

[0040] 1. When testing the charging function: the battery charge and discharge tester 7 is used as the source and the battery pack 1 is used as the load. At this time, the battery charge and discharge tester 7 outputs voltage and current to the battery pack 1. The magnitude of the voltage and current is the voltage and current display value of the "charging" interface of the battery charge and discharge tester 7.

[0041] 2. When testing the discharge function: the battery charge and discharge tester 7 is used as a load, and the battery pack 1 is used as a source. At this time, the battery pack 1 outputs voltage and current to the battery charge and discharge tester 7. The magnitude of the voltage and current is the voltage and current display value of the "discharge" interface of the battery charge and discharge tester 7.

[0042] When the detection device of the portable battery charge and discharge tester detects the charging or discharging of the battery charge and discharge tester, the DC voltage and DC current values ​​of the whole system are displayed on the "charging" or "discharging" interface.

[0043] The detection method of the portable battery charge and discharge tester detection device:

[0044] 1. Detect charging function:

[0045] ⑴Connect the circuit: Turn the DC circuit breaker to the OFF position and follow the Figure 1 Connect the devices according to the wiring diagram.

[0046] ⑵ Turn on the battery charge and discharge tester 7, turn the DC circuit breaker 4 to the ON position, turn the DC circuit breaker 7 of the battery charge and discharge tester 7 to the ON position, because some battery charge and discharge testers have DC circuit breakers, and some battery charge and discharge testers do not have DC circuit breakers. If the battery charge and discharge tester being tested has a DC circuit breaker, turn it to the ON position.

[0047] ⑶ Enter the setting interface of the battery charge and discharge tester 7, set the terminal voltage upper limit of the battery group 1, set the charging current, charging time and other parameters, save and exit.

[0048] (4) Enter the charging interface of the battery charge and discharge tester 7, click OK to start charging.

[0049] ⑸ The charging interface of the battery charge and discharge tester 7 displays the DC current value of the charging, the DC voltage value of the battery pack, the charging time value, etc. The charging current flows through the detection device of the portable battery charge and discharge tester, and the terminal voltage of the battery pack 1 is displayed on the first digital DC voltmeter 2. After the DC current flows through the DC shunt 3, a DC voltage will be generated in the DC shunt, and the voltage is displayed on the second digital DC voltmeter 6. The DC current value can be calculated by the voltage value. When the charging current reaches the set value, press the timer to record the charging time. In this way, the detection device of the portable battery charge and discharge tester will obtain the terminal voltage value of the battery pack 1, the charging current value and the charging time of the battery charge and discharge tester 7; the charging interface of the battery charge and discharge tester 7 also displays the terminal voltage value of the battery pack 1, the charging current value and the charging time value of the battery charge and discharge tester 7, and the two sets of data can be compared.

[0050] 2. Detect discharge function:

[0051] ⑴Connect the circuit: Turn the DC circuit breaker 4 to the OFF position and follow the Figure 1 Connect the devices according to the wiring diagram.

[0052] ⑵ Turn on the battery charge and discharge tester 7, and turn the DC circuit breaker 4 to the ON position. Turn the DC circuit breaker 4 of the battery charge and discharge tester 7 to the ON position. Because some battery charge and discharge testers have DC circuit breakers, and some battery charge and discharge testers do not have DC circuit breakers. If the battery charge and discharge tester being tested has a DC circuit breaker, turn it to the ON position.

[0053] ⑶ Enter the setting interface of the battery charge and discharge tester 7, set the upper and lower limits of the terminal voltage of the battery group 1, set the discharge current, discharge time and other parameters, save and exit.

[0054] (4) Enter the discharge interface of the battery charge and discharge tester 7, click OK to start discharging.

[0055] ⑸ The discharge interface of the battery charge and discharge tester 7 displays the DC current value of the discharge, the DC voltage value of the battery pack 1, the discharge time value, etc. The discharge current flows through the detection device of the portable battery charge and discharge tester, and the terminal voltage of the battery pack 1 is displayed on the first digital DC voltmeter 2. After the DC current flows through the DC shunt, it will generate a DC voltage in the DC shunt 3. The voltage is displayed on the second digital DC voltmeter 6. The DC current value can be calculated based on the voltage value. When the discharge current reaches the set value, press the timer to record the discharge time. In this way, the detection device of the portable battery charge and discharge tester will obtain the terminal voltage value of the battery pack 1, the discharge current value and the discharge time of the battery pack 1; the terminal voltage value of the battery pack, the discharge current value and the discharge time value of the battery pack 1 are also displayed on the discharge interface of the battery charge and discharge tester 7, and the two sets of data can be compared. Data processing:

[0056]

[0057] Where: γ is the relative error of the DC current or DC voltage of the battery charge and discharge tester under test;

[0058] χ N ——The displayed value of DC current or DC voltage of the battery charge and discharge tester;

[0059] χ0——The converted value of DC current or the displayed value of DC voltage of the detection device of the portable battery charge and discharge tester.

[0060] The relative error of DC current or DC voltage calculated by the above formula can be used to determine the accuracy level of the battery charge and discharge tester.

Claims

1. A portable battery charge and discharge tester detection device, comprising a battery pack, a digital DC voltmeter, a DC shunt, a DC circuit breaker, a timer and a panel, characterized in that: The specific structure and connection relationship of the components are as follows: The digital DC voltmeter, DC shunt, DC circuit breaker and timer are installed on a panel. The panel is provided with a current access terminal of a battery charge and discharge tester and a current access terminal of a battery pack. A DC shunt and a DC circuit breaker are connected in series between the positive end of the current access terminal of the battery charge and discharge tester and the positive end of the current access terminal of the battery pack. A digital DC voltmeter is connected in parallel at both ends of the DC shunt. A digital DC voltmeter is also connected in parallel at the positive and negative ends of the current of the panel battery charge and discharge tester. The voltage collection line of the battery charge and discharge tester is also connected in parallel to the positive and negative ends of the current of the panel battery charge and discharge tester.

2. The detection device of the portable battery charge and discharge tester according to claim 1, characterized in that: The positive end and the negative end of the battery pack current access terminal on the panel are connected to the positive end and the negative end of the battery pack respectively.

3. The detection device of the portable battery charge and discharge tester according to claim 1, characterized in that: The positive end and the negative end of the current access terminal of the battery charge and discharge tester on the panel are respectively connected to the positive current terminal and the negative current terminal of the battery charge and discharge tester.

4. The detection method of the detection device of the portable battery charge and discharge tester according to claim 1, characterized in that: The detection device can detect the charging and discharging functions of the battery charge and discharge tester, including the following steps: Detect charging function: ⑴Connect the circuit: turn the DC circuit breaker to the OFF position and connect the equipment according to the connection diagram; ⑵ Turn on the battery charge and discharge tester and turn the DC circuit breaker to the ON position; ⑶ Enter the setting interface of the battery charge and discharge tester, set the terminal voltage upper limit of the battery pack, set the charging current, charging time and other parameters, save and exit; ⑷ Enter the charging interface of the battery charge and discharge tester, click OK to start charging; (5) The charging interface of the battery charge and discharge tester displays the DC current value of the charging, the DC voltage value of the battery pack, and the charging time value. The charging current flows through the detection device of the portable battery charge and discharge tester, and the terminal voltage of the battery pack is displayed on the digital DC voltmeter. After the DC current flows through the DC shunt, a DC voltage will be generated in the DC shunt, and the voltage is displayed on the digital DC voltmeter. The DC current value can be calculated by the voltage value. When the charging current reaches the set value, press the timer to record the charging time. In this way, the detection device of the portable battery charge and discharge tester will obtain the terminal voltage value of the battery pack, the charging current value of the battery charge and discharge tester, and the charging time. The battery charge and discharge tester also displays the terminal voltage value of the battery pack, the charging current value of the battery charge and discharge tester, and the charging time value. The two sets of data can be compared; Detection of discharge function: ⑴Connect the circuit: turn the DC circuit breaker to the OFF position and connect the equipment according to the connection diagram; ⑵ Turn on the battery charge and discharge tester and turn the DC circuit breaker to the ON position; ⑶ Enter the setting interface of the battery charge and discharge tester, set the upper and lower limits of the terminal voltage of the battery pack, set the discharge current, discharge time and other parameters, save and exit; ⑷ Enter the discharge interface of the battery charge and discharge tester, click OK to start discharging; ⑸ The discharge interface of the battery charge and discharge tester displays the DC current value of the discharge, the DC voltage value of the battery pack, and the discharge time value. The discharge current flows through the detection device of the portable battery charge and discharge tester, and the terminal voltage of the battery pack is displayed on the digital DC voltmeter. After the DC current flows through the DC shunt, a DC voltage will be generated in the DC shunt, and the voltage is displayed on the digital DC voltmeter. The DC current value can be calculated based on the voltage value. When the discharge current reaches the set value, press the timer to record the discharge time to obtain the battery pack terminal voltage value, the battery pack discharge current value and the discharge time. The battery pack terminal voltage value, the battery pack discharge current value and the discharge time value are also displayed on the discharge interface of the battery charge and discharge tester. The two sets of data can be compared. Data processing: Where: γ is the relative error of the DC current or DC voltage of the battery charge and discharge tester under test; χ N ——The displayed value of DC current or DC voltage of the battery charge and discharge tester; χ0——the converted value of DC current or the displayed value of DC voltage of the detection device of the portable battery charge and discharge tester, The relative error of DC current or DC voltage calculated by the above formula can be used to determine the accuracy level of the battery charge and discharge tester.

5. The detection method of the detection device of the portable battery charge and discharge tester according to claim 4, characterized in that: When testing the charging function: the battery charge and discharge tester acts as the source and the battery pack acts as the load. At this time, the battery charge and discharge tester outputs voltage and current to the battery pack. The voltage and current are the voltage and current display values ​​on the "charging" interface of the battery charge and discharge tester.

6. The detection method of the detection device of the portable battery charge and discharge tester according to claim 4, characterized in that: When testing the discharge function: the battery charge and discharge tester acts as a load and the battery pack acts as a source. At this time, the battery pack outputs voltage and current to the battery charge and discharge tester. The magnitude of the voltage and current is the voltage and current displayed on the "discharge" interface of the battery charge and discharge tester.

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