CN107831389B - 0V charging function test method and circuit - Google Patents

0V charging function test method and circuit Download PDF

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Publication number
CN107831389B
CN107831389B CN201711071897.7A CN201711071897A CN107831389B CN 107831389 B CN107831389 B CN 107831389B CN 201711071897 A CN201711071897 A CN 201711071897A CN 107831389 B CN107831389 B CN 107831389B
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China
Prior art keywords
capacitor
voltage
charging
test
protection board
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CN107831389A (en
Inventor
龚珍
梁米华
杨亭亭
李武岐
袁唯
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Sunwoda Electronic Co Ltd
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Sunwoda Electronic Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere

Abstract

The invention discloses a 0V charging function test method and a circuit, which are used for testing the OV charging function of a battery protection board, and the test method comprises the following steps: s1, connecting the capacitor to the cell connecting end of the protection board; s2, applying a preset charging voltage to the protection plate; s3, monitoring the voltage value of the capacitor; and S4, determining the 0V charging function of the protection board to be enabled or disabled according to the voltage value. According to the embodiment of the invention, the capacitor is connected to the battery cell connecting end of the protection board, when a preset charging voltage is applied to the protection board, the change of the voltage values at the two ends of the capacitor is monitored, when the voltage at the two ends of the capacitor is close to the preset charging voltage, the 0V charging function of the protection board is allowed, and when the voltage at the two ends of the capacitor is close to 0V, the 0V charging function of the protection board is forbidden; the test method is simple and easy to implement, the capacitor can release charges to really reach 0V, and the accuracy of the 0V charging function of the test protection board can be effectively improved.

Description

0V charging function test method and circuit
Technical Field
The invention relates to the technical field of battery testing, in particular to a 0V charging function testing method and a circuit.
Background
A battery refers to a device that converts chemical energy into electrical energy in a portion of the space of a cup, tank, or other container or composite container that holds an electrolyte solution and metal electrodes to produce an electrical current. The existing battery comprises an electric core and a battery protection board, wherein the protection board can play a role in protecting the electric core, in the production process of the battery, various tests need to be carried out on the protection board, wherein the 0V charging function comprising the test protection board is adopted, and the protection board is usually connected with the electric core close to 0V for testing when the 0V charging function of the battery protection board is tested.
However, the test method has the disadvantages that the time consumed by the battery cell discharging is long and the operation is not easy, and in addition, the battery cell cannot be completely discharged to 0V, so that the 0V charging function of the protection board cannot be accurately measured, and the error of the test result is large.
Disclosure of Invention
The invention aims to solve the technical problem of providing a 0V charging function test method aiming at the defects in the prior art. A0V capacitor is connected to the battery cell connecting end of the protection plate to replace a battery cell, and the 0V charging function of the protection plate can be accurately measured.
The invention further aims to solve the technical problem of providing a 0V charging function test circuit. A0V capacitor is connected to the battery cell connecting end of the protection plate to replace a battery cell, and the 0V charging function of the protection plate can be accurately measured.
The technical means adopted by the invention for solving the technical problem is to provide a 0V charging function testing method for testing the OV charging function of a battery protection board, which comprises the following steps:
s1, connecting the capacitor to the cell connecting end of the protection board;
s2, applying a preset charging voltage to the protection plate;
s3, monitoring the voltage value of the capacitor;
and S4, determining the 0V charging function of the protection board to be enabled or disabled according to the voltage value.
Further, the step S1 specifically includes:
s11, discharging the capacitor to 0V;
s12, connecting the two ends of the capacitor to the positive electrode connecting end B + of the battery cell of the protection board and the battery cell respectively
The negative pole is connected with a terminal B-.
Further, the monitoring the voltage value of the capacitor specifically includes connecting a voltage monitor in parallel at two ends of the capacitor and reading the voltage value at two ends of the capacitor through the voltage monitor.
Further, the step S4 specifically includes:
s41, judging whether the voltage value of the capacitor is close to the preset charging voltage or not;
s42, if yes, the 0V charging function of the protection board is judged to be allowed, otherwise, the protection board is judged to be allowed
The 0V charging function of (1) is disabled.
In another aspect, an embodiment of the present invention further provides a 0V charging function testing circuit, configured to test an OV charging function of a battery protection board, where the circuit includes a test power module configured to provide a preset charging voltage for the protection board and a monitoring module configured to monitor a voltage at a cell connection terminal of the protection board, and the monitoring module includes a test capacitor C1 connected to the cell connection terminal of the protection board and a voltage monitor configured to monitor a voltage value of the test capacitor C1.
Further, the battery cell connecting end of the protection board comprises a battery cell positive connecting end B + and a battery cell negative connecting end B-, and two ends of the test capacitor C1 are respectively connected to the battery cell positive connecting end B + and the battery cell negative connecting end B-.
Further, the monitoring module further comprises a discharge switch connected in parallel with the test capacitor C1 for discharging the test capacitor C1 to 0V.
Furthermore, the protection board is provided with a positive charging end P + and a negative charging end P-, and the positive output end and the negative output end of the test power supply module are respectively connected with the positive charging end P + and the negative charging end P-.
Further, the test power supply module comprises a direct current stabilized power supply for outputting the preset charging voltage.
Further, the voltage monitor comprises any one of the following: voltmeter, universal meter and voltmeter.
By adopting the technical scheme, the invention at least has the following beneficial effects: according to the invention, the capacitor is connected to the battery cell connecting end of the protection board, when a preset charging voltage is applied to the protection board, by monitoring the change of the voltage values at the two ends of the capacitor, when the voltage at the two ends of the capacitor is close to the preset charging voltage, the 0V charging function of the protection board is allowed, and when the voltage at the two ends of the capacitor is close to 0V, the 0V charging function of the protection board is forbidden; the test method is simple and easy to implement, the capacitor can quickly release charges so as to really reach 0V, the accuracy of the 0V charging function of the test protection board can be effectively improved, and the test efficiency is improved.
Drawings
Fig. 1 is a flow chart of the 0V charging function test method of the present invention.
Fig. 2 is a detailed flowchart of step S1 of the 0V charging function testing method according to the present invention.
Fig. 3 is a detailed flowchart of step S4 of the 0V charging function testing method according to the present invention.
FIG. 4 is a block diagram of the 0V charging function test circuit according to the present invention.
FIG. 5 is a schematic diagram of a specific circuit structure of the 0V charging function test circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: A0V charging function test method is used for testing OV charging function of a battery protection board and comprises the following steps:
s1, connecting the capacitor to the cell connecting end of the protection board;
s2, applying a preset charging voltage to the protection plate;
s3, monitoring the voltage value of the capacitor;
and S4, determining the 0V charging function of the protection board to be enabled or disabled according to the voltage value.
In implementation, the capacitor simulation cell is connected to the cell connection end of the protection board, the preset charging voltage is a standard charging voltage of a battery, in this embodiment, a capacitor is connected to the cell connection end of the protection board, when the preset charging voltage is applied to the protection board, the protection board outputs voltage through the cell connection end, at this time, by monitoring a change in voltage values at two ends of the capacitor, when the voltage at two ends of the capacitor is close to the preset charging voltage, the 0V charging function of the protection board is allowed, and when the voltage at two ends of the capacitor is close to 0V, the 0V charging function of the protection board is determined to be forbidden; the method for testing the 0V charging function is simple and easy to implement, the capacitor can quickly release charges so as to really reach 0V, the accuracy of testing the 0V charging function of the protection board can be effectively improved, and the testing efficiency is improved.
In an optional embodiment, the step S1 specifically includes:
s11, discharging the capacitor to 0V;
s12, the two ends of the capacitor are respectively connected to the battery cell positive electrode connecting end B + and the battery cell negative electrode connecting end B-of the protection board.
In the embodiment, the capacitor is discharged firstly, so that the capacitor really reaches 0V, and then the capacitor is connected to the battery cell positive electrode connecting end B + and the battery cell negative electrode connecting end B-of the protection board to replace the battery cell for testing, and the accuracy of the 0V charging function of the test protection board can be effectively improved.
In an alternative embodiment, the monitoring the voltage value of the capacitor specifically includes connecting a voltage monitor in parallel across the capacitor and reading the voltage value across the capacitor through the voltage monitor.
In the embodiment, the voltage monitors are connected in parallel at the two ends of the capacitor, so that the voltage change conditions at the two ends of the capacitor can be visually obtained through the voltage monitors, the monitoring operation on the voltage of the capacitor is simplified, and the testing method is simple and easy to implement.
In an optional embodiment, the step S4 specifically includes:
s41, judging whether the voltage value of the capacitor is close to the preset charging voltage or not;
and S42, if yes, judging that the 0V charging function of the protection plate is allowed, otherwise, judging that the 0V charging function of the protection plate is forbidden.
In the embodiment, whether the protection board allows the 0V charging function is judged by observing the change of the voltage values at the two ends of the capacitor and according to the voltage values, the judging method is simple and reliable, and the accuracy of testing the 0V charging function of the protection board is improved.
On the other hand, as shown in fig. 4 and 5, the present invention further provides a 0V charging function testing circuit for testing the OV charging function of the battery protection board U1, the circuit includes a testing power module U2 for providing a preset charging voltage to the protection board U1 and a monitoring module U3 for monitoring the voltage at the cell connection end of the protection board U1, and the monitoring module U3 includes a testing capacitor C1 connected to the cell connection end of the protection board U1 and a voltage monitor V1 for monitoring the voltage value of the testing capacitor C1.
In specific implementation, the voltage monitor V1 may be a voltmeter, a multimeter or a voltage measuring instrument or other instrument capable of measuring the voltage across the test capacitor C1.
The voltage of monitoring module U3 in order to monitor the electric core link of protection shield U1 is passed through to this embodiment, when test power module U2 provides for the protection shield and predetermines charging voltage, and monitoring module U3 can detect the voltage variation of the electric core link of protection shield U1, specifically is the voltage variation through voltage monitor V1 monitoring test electric capacity C1 both ends, if the voltage at test electric capacity C1 both ends is close predetermine charging voltage, then the protection shield allows 0V function of charging, if the voltage at test electric capacity C1 both ends is close 0V, then the protection shield does not allow 0V function of charging, and the circuit is simple and reliable, can effectively improve the accuracy of test protection shield 0V function of charging.
In an optional embodiment, the cell connection end of the protection board U1 includes a cell positive connection end B + and a cell negative connection end B-, and both ends of the test capacitor C1 are respectively connected to the cell positive connection end B + and the cell negative connection end B-.
In this embodiment, the test capacitor C1 is used to replace a cell to be connected to the cell positive connection end B + and the cell negative connection end B-of the protection board U1, the voltage value at the two ends of the test capacitor C1 is detected by the voltage monitor V1, and whether the 0V charging function of the protection board U1 is allowable is determined according to the voltage value change of the test capacitor C1, so that the test capacitor C1 can actually discharge to 0V, thereby improving the test accuracy.
In an alternative embodiment, the monitoring module U3 further includes a discharge switch KI connected in parallel with the test capacitor C1 for discharging the test capacitor C1 to 0V.
In this embodiment, by providing the discharge switch KI connected in parallel with the test capacitor, before the test, the two ends of the test capacitor C1 are connected to each other to discharge by closing the discharge switch KI, the discharge switch KI is disconnected after discharging for a preset time, at this time, the voltage of the test capacitor C1 is about 0V, the test capacitor C1 can be discharged to 0V without detaching the test capacitor C1 from the circuit, the test efficiency can be effectively improved, and in the specific implementation, the discharge switch K1 can be further connected in series with a resistor (not shown in the figure) to prevent the test capacitor C1 from being lost.
In an alternative embodiment, the protection board U1 has a positive charging terminal P + and a negative charging terminal P-, and the positive output terminal and the negative output terminal of the test power module U2 are connected to the positive charging terminal P + and the negative charging terminal P-, respectively.
In one embodiment, the test power module U2 includes a regulated dc power supply VSS for outputting the preset charging voltage, a positive electrode of the regulated dc power supply VSS is connected to the positive charging terminal P +, a negative electrode of the regulated dc power supply VSS is connected to the negative charging terminal P-, the regulated dc power supply VSS outputs the preset charging voltage, although in specific implementations, the test power module U2 may also adopt other power supplies capable of outputting the preset charging voltage, such as: the voltage conversion unit is used for converting the voltage output by the mains supply or other voltage power supplies into a preset charging voltage.
The 0V charging function test method and the circuit of the invention have the following working principles:
taking the voltage monitor V1 as an example of a universal meter, the invention utilizes the characteristic that the capacitor can rapidly store and release electric charges, and uses the test capacitor C1 to simulate that a battery cell is connected with the battery cell anode connecting end B + and the battery cell cathode connecting end B-of the protection board U1, and simultaneously connects the anode end and the cathode end of the universal meter with the battery cell anode connecting end B + and the battery cell cathode connecting end B-of the protection board U1 respectively to monitor the voltage of the test capacitor C1.
The test power supply module U2 adopts direct current regulated power supply VSS to output preset charging voltage to be connected with a positive charging end P + and a negative charging end P-of the protection board U1 for charging, the change situation of the voltage at two ends of the test capacitor C1 is obtained by observing the reading of the universal meter, when the reading of the universal meter is close to the preset charging voltage, the 0V charging function of the protection board U1 is allowed, otherwise, when the reading of the universal meter is close to 0V, the 0V charging function of the protection board U1 is forbidden.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (6)

1. A0V charging function test method is used for testing the 0V charging function of a battery protection plate and is characterized by comprising the following steps:
s1, connecting the capacitor to the cell connecting end of the protection board;
s2, applying a preset charging voltage to the protection plate;
s3, monitoring the voltage value of the capacitor;
s4, determining the 0V charging function of the protection board to be allowed or forbidden according to the voltage value;
wherein, the S1 specifically includes:
s11, discharging the capacitor to 0V;
s12, connecting the two ends of the capacitor to the battery cell positive electrode connecting end B + and the battery cell negative electrode connecting end B-of the protection board respectively;
the S4 specifically includes:
s41, judging whether the voltage value of the capacitor is close to the preset charging voltage or not;
and S42, if yes, judging that the 0V charging function of the protection plate is allowed, otherwise, judging that the 0V charging function of the protection plate is forbidden.
2. The 0V charging function test method according to claim 1, characterized in that: the monitoring of the voltage value of the capacitor specifically comprises the steps of connecting voltage monitors at two ends of the capacitor in parallel and reading the voltage value at two ends of the capacitor through the voltage monitors.
3. The utility model provides a 0V function test circuit that charges for the 0V function of charging of test battery protection shield, its characterized in that: the circuit comprises a test power supply module for providing a preset charging voltage for the protection board and a monitoring module for monitoring the voltage of the cell connecting end of the protection board, wherein the monitoring module comprises a test capacitor C1 connected to the cell connecting end of the protection board and a voltage monitor for monitoring the voltage value of the test capacitor C1;
the battery cell connecting end of the protection board comprises a battery cell positive connecting end B + and a battery cell negative connecting end B-, and two ends of the test capacitor C1 are respectively connected to the battery cell positive connecting end B + and the battery cell negative connecting end B-; the monitoring module further comprises a discharge switch connected in parallel with the test capacitor C1 for discharging the test capacitor C1 to 0V.
4. The 0V charging function test circuit according to claim 3, wherein: the protection board is provided with a positive charging end P + and a negative charging end P-, and the positive output end and the negative output end of the test power supply module are respectively connected with the positive charging end P + and the negative charging end P-.
5. The 0V charging function test circuit according to claim 4, wherein: the test power supply module comprises a direct current stabilized power supply for outputting the preset charging voltage.
6. The 0V charging function test circuit according to any one of claims 3 to 5, wherein: the voltage monitor comprises any one of the following components: voltmeter, universal meter and voltmeter.
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