CN108226687B - Portable PDVD decoding plate charge-discharge function detection circuit - Google Patents

Portable PDVD decoding plate charge-discharge function detection circuit Download PDF

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Publication number
CN108226687B
CN108226687B CN201810267128.2A CN201810267128A CN108226687B CN 108226687 B CN108226687 B CN 108226687B CN 201810267128 A CN201810267128 A CN 201810267128A CN 108226687 B CN108226687 B CN 108226687B
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detection
battery
charging
charge
switch
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CN108226687A (en
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陈付民
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Shenzhen Hcn Electrical Appliance Co ltd
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Shenzhen Hcn Electrical Appliance 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a portable PDVD decoding plate charge and discharge function detection circuit, which is provided with a decoding plate central control unit, a battery charge protection unit and a status indicator lamp, wherein a decoding plate working power supply supplies power to the decoding plate central control unit and the battery charge protection unit through a power switch (SW 5); the detection module selects a discharge detection power supply or a charge detection battery through a detection mode selection switch (SW 3); the detection circuit is provided with a charging detection mode and a discharging detection mode, wherein in the charging detection mode, the decoding plate working power supply forms a detection loop from a power switch, a battery charging protection unit, a detection module and a detection mode selection switch to a charging detection battery, and in the discharging detection mode, the discharging detection power supply forms a detection loop from the detection mode selection switch, the detection module and the battery charging protection unit; compared with the prior art, the invention has the advantages of simple structure, simple and convenient operation, reliable detection result and flexible adjustment.

Description

Portable PDVD decoding plate charge-discharge function detection circuit
Technical Field
The invention relates to a charge and discharge function detection circuit, in particular to a charge and discharge function detection circuit for a portable PDVD decoding plate.
Background
When the PDVD decoding plate is manufactured into a semi-finished decoding plate, a central control unit, a battery charging protection unit, a status indicator lamp and the like are arranged on the plate, at the moment, the decoding plate is required to be subjected to charging and discharging function detection, and the semi-finished product after the detection is qualified is assembled with components such as a battery, a shell and the like. The existing detection technology realizes the detection of the charge and discharge function through the technologies of electronic technology, instruments and meters, and the like, so that the test scheme can not be changed once being fixed, the flexibility is insufficient, and the test scheme can not be customized and modified.
Therefore, there is a need in the art to develop a portable PDVD decoding board charge and discharge function detection circuit with simple structure, simple operation and flexible adjustment.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a portable PDVD decoding plate charge and discharge function detection circuit.
In order to solve the technical problems, the technical scheme provided by the invention is to design a portable PDVD decoding plate charge and discharge function detection circuit, wherein the PDVD decoding plate is provided with a decoding plate central control unit, a battery charge protection unit and a status indicator lamp for displaying the working mode of the battery charge protection unit, and the detection circuit is also provided with a decoding plate working power supply, a discharge detection power supply, a charge detection battery and a detection module, wherein the decoding plate working power supply supplies power to the decoding plate central control unit and the battery charge protection unit through a power switch; the detection module selects one of a discharge detection power supply and a charge detection battery through a detection mode selection switch; the detection circuit is provided with a charging detection mode and a discharging detection mode, wherein in the charging detection mode, the decoding plate working power supply forms a detection loop from a power switch, a battery charging protection unit, a detection module and a detection mode selection switch to a charging detection battery, and in the discharging detection mode, the discharging detection power supply forms a detection loop from the detection mode selection switch, the detection module and the battery charging protection unit.
The battery charging protection unit is provided with a charging and discharging protection chip, a discharging control end of the charging and discharging protection chip is connected with a first grid electrode of the double-grid field effect transistor, and a charging control end of the charging and discharging protection chip is connected with a second grid electrode of the double-grid field effect transistor; the detection module is provided with an anode bus and a cathode bus, the anode bus is coupled with a movable contact of the detection mode selection switch, a first static contact and a second static contact of the detection mode selection switch are respectively connected with the anode of the discharge detection power supply and the anode of the charge detection battery, the discharge detection power supply and the cathode of the charge detection battery are connected with the cathode bus, the cathode bus is connected with the source electrode of the double-grid field effect transistor and is grounded through an activation switch, and the drain electrode of the double-grid field effect transistor is grounded; the first resistor, the second resistor and the third resistor are connected in series between the positive bus and the negative bus, two ends of the second resistor are connected with a short-circuit switch in parallel, and a connection point of the first resistor and the second resistor is connected with a voltage detection end of the charge-discharge protection chip.
And a first switch is connected in series between the positive bus and the movable contact of the detection mode selection switch.
The detection circuit is provided with an automatic detection module, and the automatic detection module respectively controls the on-off of the power switch, the detection mode selection switch, the activation switch, the short-circuit switch and the first switch according to the time sequence to realize the charge detection mode and the discharge detection mode.
The first switch is connected in series with the ammeter.
And a voltmeter is connected between the positive bus and the negative bus.
And a filter capacitor is connected between the positive bus and the negative bus.
The voltage of the discharge detection power supply is 6.4 volts, and the voltage of the charge detection battery is in the range of 7 to 8.2 volts.
Compared with the prior art, the invention has the advantages of simple structure, simple and convenient operation, reliable detection result and flexible adjustment.
Drawings
FIG. 1 is a schematic block diagram of a preferred embodiment of the present invention;
FIG. 2 is a circuit diagram of a preferred embodiment of the present invention;
fig. 3 is a schematic block diagram of the inside of the charge-discharge protection chip.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention discloses a portable PDVD decoding plate charge and discharge function detection circuit, which is used for detecting the charge and discharge function of a decoding plate by an external power supply and a battery when the PDVD decoding plate is a semi-finished decoding plate. And after the test is qualified, the battery is assembled, and when the battery is used, the battery can be externally connected with a power supply and can also be powered by the battery in the PDVD.
Referring to fig. 1, the PDVD decoding board is provided with a decoding board central control unit, a battery charging protection unit, and a status indicator lamp for displaying the working mode of the battery charging protection unit, and the detection circuit is also provided with a decoding board working power supply, a discharge detection power supply, a charging detection battery, and a detection module, wherein the decoding board working power supply supplies power to the decoding board central control unit and the battery charging protection unit through a power switch SW 5; the detection module selects a discharge detection power supply or a charge detection battery through a detection mode selection switch SW 3; the detection circuit is provided with a charging detection mode and a discharging detection mode, wherein in the charging detection mode, the decoding plate working power supply forms a detection loop from a power switch, a battery charging protection unit, a detection module and a detection mode selection switch to a charging detection battery, and in the discharging detection mode, the discharging detection power supply forms a detection loop from the detection mode selection switch, the detection module and the battery charging protection unit.
And a voltage regulating circuit is arranged in the detection module. In the charging detection mode, firstly, a voltage regulating circuit outputs low level (representing that the battery is not fully charged) to a battery charging protection unit, and a decoding board working power supply charges a charging detection battery through the battery charging protection unit and a detection module, so that whether the charging is normal or not is detected; and then the voltage regulating circuit outputs a high level (indicating that the battery is full) to the battery charging protection unit, and the battery charging protection unit breaks the charging loop, so that whether the overcharge protection is normal is detected. In the discharge detection mode, firstly, a voltage regulating circuit outputs low level to a battery charging protection unit, and the battery charging protection unit continues to disconnect a discharge loop (the discharge loop means that a discharge detection power supply passes through a detection mode selection switch, a detection module, the battery charging protection unit and a decoding board load), so as to detect whether over-discharge protection is normal or not; and then the voltage regulating circuit outputs high level to the battery charging protection unit, and the battery charging protection unit is connected with the discharging loop, so that whether the overcharge protection is normal is detected.
Referring to the preferred embodiment shown in fig. 2, the battery charging protection unit has a charging and discharging protection chip, a discharging control terminal DO of the charging and discharging protection chip is connected to a first gate of the double-gate fet Q1, and a charging control terminal CO of the charging and discharging protection chip is connected to a second gate of the double-gate fet Q1; the detection module is provided with an anode bus B+ and a cathode bus B-, the anode bus B+ is coupled with a movable contact of the detection mode selection switch SW3, the first static contact and the second static contact of the detection mode selection switch are respectively connected with the anode of the discharge detection power supply and the anode of the charge detection battery, the cathodes of the discharge detection power supply and the charge detection battery are connected with the cathode bus B-, the cathode bus is connected with the source electrode of the double-grid field effect transistor Q1 and grounded through the activation switch SW4, and the drain electrode of the double-grid field effect transistor is grounded; the first resistor R1, the second resistor R2 and the third resistor R3 are connected in series between the positive bus B+ and the negative bus, two ends of the second resistor are connected with a short-circuit switch SW2 in parallel, and the connection point of the first resistor and the second resistor is connected with a voltage detection end VC of the charge-discharge protection chip. The first resistor R1, the second resistor R2 and the third resistor R3 are connected in series, and the short-circuit switch SW2 forms the voltage regulating circuit, so as to output different levels to the battery charging protection unit (i.e. the charging and discharging protection chip), and the charging and discharging protection chip controls the double-grid field effect transistor Q1 to cut off or connect with the charging or discharging loop.
In a preferred embodiment, a first switch SW1 is connected in series between the positive bus b+ and the moving contact of the detection mode selection switch SW 3.
The power switch SW5, the detection mode selection switch SW3, the activation switch SW4, the shorting switch SW2, and the first switch SW1 may be mechanical switches, and the manual operation of these switches may perform a charge detection mode and a discharge detection mode. The switches can also adopt electronic switches, and in a preferred embodiment, the detection circuit is provided with an automatic detection module, and the automatic detection module respectively controls the on-off of the power switch SW5, the detection mode selection switch SW3, the activation switch SW4, the short-circuit switch SW2 and the first switch SW1 according to time sequence to realize the charge detection mode and the discharge detection mode. The automatic detection module can improve the automation degree and reduce the labor intensity.
In a preferred embodiment, the first switch SW1 is connected in series with the ammeter a for monitoring whether the charging and discharging currents are correct (the charging current is greater than 350mA is normal). And a voltmeter V is connected between the positive bus B+ and the negative bus B-and is used for monitoring whether the input voltages of the discharge detection power supply and the charge detection battery are correct. And a filter capacitor C1 is connected between the positive bus B+ and the negative bus B-. The voltage of the discharge detection power supply is 6.4 volts, and the voltage of the charge detection battery is in the range of 7 to 8.2 volts.
The operation of the charge detection mode and the discharge detection mode is described in detail below with reference to fig. 2 and 3:
1. the charging detection mode detects the charging function, the SW1 is opened, the SW3 is communicated with the charging detection battery, the SW2 is closed, the SW1 is closed, the SW5 is closed, and the electric energy is formed into a charging loop from the decoding plate working power supply, the battery charging protection unit and the detection module to the charging detection battery. The charging voltage of 7 to 8.2 volts is regulated by a voltage regulating circuit, a low level (about 4 volts is input to a voltage detection end VC of a charging and discharging protection chip (model S-8232) which is used for indicating that a battery is not full), the charging and discharging protection chip drives a double-grid field effect tube Q1 to be communicated with a ground wire through a discharging control end DO and a charging control end CO, whether the charging is normal or not can observe a state indicator lamp on a decoding board, and at the moment, the indicator lamp is red to indicate normal charging, and if the indicator lamp is green (or is not lighted), the indicator lamp cannot be charged normally.
2. The charging detection mode detects the overcharge function, the SW2 is disconnected, the charging voltage of 7 to 8.2 volts is regulated by the voltage regulating circuit, a high level (about 6 volts is used for indicating that the battery is full) is output to the VC terminal, the charging and discharging protection chip judges that the battery is full, the double-grid field effect transistor Q1 is driven to be disconnected through the charging control terminal CO, the charging circuit is disconnected, and charging is stopped, so that overcharge protection is realized. At this time, the indicator light is green (or no light is on) to indicate that the overcharge protection is normal, and if the indicator light is red, the indicator light indicates that the overcharge protection function is abnormal.
3. The discharge detection mode detects over-discharge protection, turns off SW1, turns on SW3 a discharge detection power supply, turns off SW5, and turns on SW1. The electric energy is from discharge detection power supply, SW3 to detection module, then through the voltage regulation of the voltage regulating circuit in the detection module, output a low level (about 3.2 volts, representing that the battery electricity has been put out) to the charging and discharging protection chip VC end, the charging and discharging protection chip drives the double grid field effect transistor Q1 to break through the discharging control end DO, and the discharging loop breaks, and can't discharge. At this time, the indicator lamp should be turned off to indicate that the over-discharge protection is normal, and if the indicator lamp is turned on, the indicator lamp indicates that the over-discharge protection is abnormal.
4. And the discharging detection mode detects whether the over-discharging protection can be recovered, and the SW3 is communicated with the charging detection battery. The electric energy is from the charge detection battery, SW3 to the detection module, then through the voltage regulation of the voltage regulating circuit in the detection module, a high level (about 4V, which indicates that the battery is still electrically chargeable) is output to the VC end of the charge-discharge protection chip, the DO end and the CO end of the charge-discharge protection chip both output conducting levels, at this time, the SW4 is pressed down, both ends of Q1 are grounded, Q1 is conducted, the electric energy is discharged back from the charge detection battery, the detection module and the battery charge protection unit to the central control unit of the decoding board, the decoding board is electrified again to start working, the blue lamp (the blue lamp is the power indicator of the decoding board) in the indicator lamp is lighted to indicate that normal power supply is restored, and if the lamp is not lighted yet, the normal power supply cannot be restored.
The above examples are illustrative only and are not intended to be limiting. Any equivalent modifications or variations to the present application without departing from the spirit and scope of the present application are intended to be included within the scope of the claims of the present application.

Claims (8)

1. The utility model provides a portable PDVD decoding plate charge-discharge function detection circuitry, PDVD decoding plate has the control unit in the decoding plate, battery charge protection unit, shows the status indicator lamp of battery charge protection unit mode of operation, its characterized in that: the detection circuit is also provided with a decoding plate working power supply, a discharge detection power supply, a charge detection battery and a detection module, wherein
The decoding plate working power supply supplies power to the decoding plate central control unit and the battery charging protection unit through a power switch (SW 5);
the detection module is connected with a discharge detection power supply or a charge detection battery through a detection mode selection switch (SW 3);
the detection module is internally provided with a voltage regulating circuit, the detection circuit is provided with a charging detection mode and a discharging detection mode, a decoding plate working power supply forms a detection loop from a power switch, a battery charging protection unit, a detection module and a detection mode selection switch to a charging detection battery in the charging detection mode, and the discharging detection power supply forms a detection loop from the detecting mode selection switch, the detection module and the battery charging protection unit in the discharging detection mode;
the battery charging protection unit is provided with a charging and discharging protection chip, a discharging control end (DO) of the charging and discharging protection chip is connected with a first grid electrode of the double-grid field effect transistor (Q1), and a charging control end (CO) of the charging and discharging protection chip is connected with a second grid electrode of the double-grid field effect transistor (Q1).
2. The portable PDVD decoding board charge and discharge function detection circuit according to claim 1, wherein:
the detection module is provided with an anode bus (B+) and a cathode bus (B-), the anode bus (B+) is coupled with a movable contact of the detection mode selection switch (SW 3), a first static contact and a second static contact of the detection mode selection switch are respectively connected with the anode of the discharge detection power supply and the anode of the charge detection battery, the cathodes of the discharge detection power supply and the charge detection battery are connected with the cathode bus (B-), the cathode bus is connected with the source electrode of the double-grid field effect transistor (Q1) and is grounded through an activation switch (SW 4), and the drain electrode of the double-grid field effect transistor is grounded;
the battery is characterized in that a first resistor (R1), a second resistor (R2) and a third resistor (R3) are connected in series between the positive bus (B+) and the negative bus, two ends of the second resistor are connected with a short-circuit switch (SW 2) in parallel, and a connection point of the first resistor and the second resistor is connected with a voltage detection end (VC) of the charge-discharge protection chip.
3. The portable PDVD decoding board charge and discharge function detection circuit according to claim 2, wherein: and a first switch (SW 1) is connected in series between the positive bus (B+) and the movable contact of the detection mode selection switch (SW 3).
4. The portable PDVD decoding board charge and discharge function detection circuit according to claim 3, wherein: the detection circuit is provided with an automatic detection module, and the automatic detection module respectively controls the on-off of a power switch (SW 5), a detection mode selection switch (SW 3), an activation switch (SW 4), a short-circuit switch (SW 2) and a first switch (SW 1) according to time sequences to realize a charging detection mode and a discharging detection mode.
5. The portable PDVD decoding board charge and discharge function detection circuit according to any of claims 3 or 4, wherein: the first switch (SW 1) is connected in series with an ammeter (A).
6. The portable PDVD decoding board charge and discharge function detection circuit according to claim 5, wherein: and a voltmeter (V) is connected between the positive bus (B+) and the negative bus (B-).
7. The portable PDVD decoding board charge and discharge function detection circuit according to claim 6, wherein: and a filter capacitor (C1) is connected between the positive bus (B+) and the negative bus (B-).
8. The portable PDVD decoding board charge and discharge function detection circuit according to claim 7, wherein: the voltage of the discharge detection power supply is 6.4 volts, and the voltage of the charge detection battery is in the range of 7 to 8.2 volts.
CN201810267128.2A 2018-03-28 2018-03-28 Portable PDVD decoding plate charge-discharge function detection circuit Active CN108226687B (en)

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Publication number Priority date Publication date Assignee Title
CN110515010B (en) * 2019-08-30 2021-07-23 联动天翼新能源有限公司 Power battery test control device

Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2001136665A (en) * 1999-11-02 2001-05-18 Ricoh Co Ltd Charging and discharging protective circuit and battery pack therewith
CN103618353A (en) * 2013-11-28 2014-03-05 深圳市劲力思特科技有限公司 Battery monitoring circuit
CN104880635A (en) * 2015-06-10 2015-09-02 宁波力芯科信息科技有限公司 Detection apparatus for wireless charging receiver
WO2017030321A1 (en) * 2015-08-20 2017-02-23 주식회사 아이티엠반도체 Battery protection circuit module and battery pack comprising same
CN208270663U (en) * 2018-03-28 2018-12-21 深圳市恒晨电器有限公司 A kind of portable PDVD decoding deck charging/discharging function detection circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001136665A (en) * 1999-11-02 2001-05-18 Ricoh Co Ltd Charging and discharging protective circuit and battery pack therewith
CN103618353A (en) * 2013-11-28 2014-03-05 深圳市劲力思特科技有限公司 Battery monitoring circuit
CN104880635A (en) * 2015-06-10 2015-09-02 宁波力芯科信息科技有限公司 Detection apparatus for wireless charging receiver
WO2017030321A1 (en) * 2015-08-20 2017-02-23 주식회사 아이티엠반도체 Battery protection circuit module and battery pack comprising same
CN208270663U (en) * 2018-03-28 2018-12-21 深圳市恒晨电器有限公司 A kind of portable PDVD decoding deck charging/discharging function detection circuit

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