CN206559081U - The anti-battery reversal connection electric current recharge protection circuit of charger - Google Patents
The anti-battery reversal connection electric current recharge protection circuit of charger Download PDFInfo
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- CN206559081U CN206559081U CN201720136419.9U CN201720136419U CN206559081U CN 206559081 U CN206559081 U CN 206559081U CN 201720136419 U CN201720136419 U CN 201720136419U CN 206559081 U CN206559081 U CN 206559081U
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Abstract
The utility model provides a kind of anti-battery reversal connection electric current recharge protection circuit of charger, including NMOS tube Q1, Q2, PNP triode Q3, NPN triode Q4, electric capacity C1, voltage-regulator diode D1 and D3, diode D2, photoelectrical coupler U1, resistance R1, R2, R3, R4, R5, R6, R7, R8, R9；An electric capacity C1 termination charger positive output end and NMOS tube Q1 drain electrode, another termination charger negative output terminal, charger GND_S and battery bear terminals；NMOS tube Q1 source electrode connects NMOS tube Q2 source electrode, and NMOS tube Q1 grid connects NMOS tube Q2 grid；NMOS tube Q2 drain electrode connects the positive terminals of battery, and voltage-regulator diode D3 negative electrode；The resistance R7 other end is used to export reversal connection error signal；The resistance R8 other end is used to input charging start signal；The utility model can automatic decision battery whether reversal connection, it is to avoid battery and charger are damaged caused by manual operation mistake；Reaction is fast, voiceless sound.
Description
Technical field
The utility model is related to a kind of protection circuit, especially a kind of reverse connection prevention protection circuit.
Background technology
Battery charger can be used for the charging of automobile storage battery；What current battery charger had does not have anti-reverse
Defencive function, once accumulator polarity is reversed may to damage battery；
Some chargers use break-make relay reverse connecting protection, and reaction is slow, there is sound, and relay contact is easily damaged,
Poor reliability.
The content of the invention
For the deficiencies in the prior art, the utility model provides a kind of anti-battery reversal connection electric current recharge of charger and protected
Protection circuit, can automatic decision battery whether reversal connection, it is to avoid battery and charger are damaged caused by manual operation mistake.This practicality is new
Type use technical scheme be：
A kind of anti-battery reversal connection electric current recharge protection circuit of charger, including NMOS tube Q1, Q2, PNP triode Q3, NPN
Triode Q4, electric capacity C1, voltage-regulator diode D1 and D3, diode D2, photoelectrical coupler U1, resistance R1, R2, R3, R4, R5, R6,
R8、R9；
An electric capacity C1 termination charger positive output end and NMOS tube Q1 drain electrode, another termination charger negative output terminal,
Charger GND_S and battery bear terminals；
NMOS tube Q1 source electrode connects NMOS tube Q2 source electrode, and NMOS tube Q1 grid connects NMOS tube Q2 grid；NMOS tube
Q2 drain electrode connects the positive terminals of battery, and voltage-regulator diode D3 negative electrode；The one of voltage-regulator diode D3 anode connecting resistance R6
End, resistance R6 another termination triode Q4 base stage, diode D2 negative electrode, resistance R8, R9 one end；Resistance R8's is another
Hold for inputting charging start signal；The resistance R9 other end, diode D2 anode, triode Q4 emitter stage connects charger
Ground GND_S；
Triode Q4 colelctor electrode connecting resistance R5 one end and photoelectrical coupler U1 input negative electrode, resistance R5's is another
Terminate photoelectrical coupler U1 input anode, photoelectrical coupler U1 input anode connects optocoupler by resistance R4 and powered electricity
Pressure；Photoelectrical coupler U1 output end emitter stage with connecing metal-oxide-semiconductor MOS_GND, output end colelctor electrode connecting resistance R2 one end, resistance
R2 another termination triode Q3 base stage and resistance R3 one end, resistance R3 another termination triode Q3 emitter stage and
Metal-oxide-semiconductor supply voltage；Triode Q3 colelctor electrode connects NMOS tube Q1 and Q2 grid, and voltage-regulator diode D1 negative electrode and electricity
Hinder R1 one end；Voltage-regulator diode D1 anode meets NMOS tube Q1 and Q2 source electrode, and with connecting metal-oxide-semiconductor MOS_GND；Resistance R1
Another termination metal-oxide-semiconductor ground MOS_GND.
Further, the anti-battery reversal connection electric current recharge protection circuit of the charger, in addition to resistance R7, resistance R7 one end
Connect diode D2 negative electrode；The resistance R7 other end is used to export reversal connection error signal.
The utility model has the advantage of：
1）Can automatic decision battery whether reversal connection, it is to avoid battery and charger are damaged caused by manual operation mistake.
2）Switched using FET, reaction is fast, voiceless sound, and durability is good, is hardly damaged.
Brief description of the drawings
Fig. 1 is electrical schematic diagram of the present utility model.
Embodiment
With reference to specific drawings and examples, the utility model is described in further detail.
The utility model proposes the anti-battery reversal connection electric current recharge protection circuit of charger, as shown in figure 1, including NMOS tube
Q1, Q2, PNP triode Q3, NPN triode Q4, electric capacity C1, voltage-regulator diode D1 and D3, diode D2, photoelectrical coupler U1,
Resistance R1, R2, R3, R4, R5, R6, R7, R8, R9；
An electric capacity C1 termination charger positive output end and NMOS tube Q1 drain electrode, another termination charger negative output terminal,
Charger GND_S and battery bear terminals；Charger of the present utility model GND_S and metal-oxide-semiconductor MOS_GND be independent
's；
NMOS tube Q1 source electrode connects NMOS tube Q2 source electrode, and NMOS tube Q1 grid connects NMOS tube Q2 grid；NMOS tube
Q2 drain electrode connects the positive terminals of battery, and voltage-regulator diode D3 negative electrode；The one of voltage-regulator diode D3 anode connecting resistance R6
End, resistance R6 another termination triode Q4 base stage, diode D2 negative electrode, resistance R7, R8, R9 one end；Resistance R7's
The other end is used to export reversal connection error signal；The resistance R8 other end is used to input charging start signal；The resistance R9 other end,
Diode D2 anode, triode Q4 emitter stage with connecing charger GND_S；
Triode Q4 colelctor electrode connecting resistance R5 one end and photoelectrical coupler U1 input negative electrode, resistance R5's is another
Photoelectrical coupler U1 input anode is terminated, photoelectrical coupler U1 input anode connects optocoupler supply voltage by resistance R4
+12V5B；Photoelectrical coupler U1 output end emitter stage with connecing metal-oxide-semiconductor MOS_GND, output end colelctor electrode connecting resistance R2 one end,
Resistance R2 another termination triode Q3 base stage and resistance R3 one end, resistance R3 another termination triode Q3 emitter stage
With metal-oxide-semiconductor supply voltage+12V_MOS；Triode Q3 colelctor electrode meets NMOS tube Q1 and Q2 grid, and voltage-regulator diode D1
Negative electrode and resistance R1 one end；Voltage-regulator diode D1 anode meets NMOS tube Q1 and Q2 source electrode, and with connecting metal-oxide-semiconductor MOS_
GND；Resistance R1 another termination metal-oxide-semiconductor ground MOS_GND；
Operation principle of the present utility model is that, when battery connection is normal, single-chip microcomputer sends charging start signal+3.3V, warp
Cross after resistance R8, open triode Q4, turn on photoelectrical coupler U1, triode Q3 and then be also switched on, in voltage-regulator diode D1 two
End produces pressure drop so that NMOS tube Q1 and Q2 VGSFor positive bias-voltage so that main switch FET Q1 and Q2 are turned on, to load
Battery charges；
If battery wire incorrect polarity, when single-chip microcomputer sends charging start signal+3.3V, the electric current after resistance R8
- 12V is connected to by R6 and D3, triode Q4 base stages are by D2 clampers to -0.7V, it is impossible to turn on, and photoelectrical coupler U1 can not
Transmit signal（It is not turned on）, triode Q3 can not also turn on, NMOS tube Q1 and Q2 VGSPositive bias-voltage, NMOS tube Q1 can not be formed
It can not be turned on Q2, battery can not form current loop, so as to protect charger and battery.
In battery wire incorrect polarity, diode D2 clamp voltage -0.7V can also feed back to list by resistance R7
Piece machine, produces a reversal connection error signal.
Claims (2)
1. a kind of anti-battery reversal connection electric current recharge protection circuit of charger, it is characterised in that including the pole of NMOS tube Q1, Q2, PNP tri-
Pipe Q3, NPN triode Q4, electric capacity C1, voltage-regulator diode D1 and D3, diode D2, photoelectrical coupler U1, resistance R1, R2, R3,
R4、R5、R6、R8、R9；
An electric capacity C1 termination charger positive output end and NMOS tube Q1 drain electrode, another termination charger negative output terminal, charging
Device GND_S and battery bear terminals；
NMOS tube Q1 source electrode connects NMOS tube Q2 source electrode, and NMOS tube Q1 grid connects NMOS tube Q2 grid；NMOS tube Q2's
Drain electrode connects the positive terminals of battery, and voltage-regulator diode D3 negative electrode；Voltage-regulator diode D3 anode connecting resistance R6 one end, electricity
Resistance R6 another termination triode Q4 base stage, diode D2 negative electrode, resistance R8, R9 one end；The resistance R8 other end is used
In input charging start signal；The resistance R9 other end, diode D2 anode, triode Q4 emitter stage are with connecing charger
GND_S；
Triode Q4 colelctor electrode connecting resistance R5 one end and photoelectrical coupler U1 input negative electrode, resistance R5 another termination
Photoelectrical coupler U1 input anode, photoelectrical coupler U1 input anode connects optocoupler supply voltage by resistance R4；Light
Electric coupler U1 output end emitter stage with connecing metal-oxide-semiconductor MOS_GND, output end colelctor electrode connecting resistance R2 one end, resistance R2's
Another termination triode Q3 base stage and resistance R3 one end, resistance R3 another termination triode Q3 emitter stage and metal-oxide-semiconductor
Supply voltage；Triode Q3 colelctor electrode connects NMOS tube Q1 and Q2 grid, and voltage-regulator diode D1 negative electrode and resistance R1
One end；Voltage-regulator diode D1 anode meets NMOS tube Q1 and Q2 source electrode, and with connecting metal-oxide-semiconductor MOS_GND；Resistance R1's is another
One termination metal-oxide-semiconductor ground MOS_GND.
2. a kind of anti-battery reversal connection electric current recharge protection circuit of charger, it is characterised in that
Also include resistance R7, resistance R7 terminating diode D2 negative electrode；The resistance R7 other end reports an error for exporting reversal connection
Signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720136419.9U CN206559081U (en) | 2017-02-15 | 2017-02-15 | The anti-battery reversal connection electric current recharge protection circuit of charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720136419.9U CN206559081U (en) | 2017-02-15 | 2017-02-15 | The anti-battery reversal connection electric current recharge protection circuit of charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206559081U true CN206559081U (en) | 2017-10-13 |
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ID=60011013
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720136419.9U Active CN206559081U (en) | 2017-02-15 | 2017-02-15 | The anti-battery reversal connection electric current recharge protection circuit of charger |
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| Country | Link |
|---|---|
| CN (1) | CN206559081U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512274A (en) * | 2018-04-20 | 2018-09-07 | 广州金升阳科技有限公司 | A kind of battery charger adaptive circuit |
| CN108539712A (en) * | 2018-04-10 | 2018-09-14 | 苏州南江乐博机器人有限公司 | A kind of robot power supply input control device and input guard method |
| CN110048680A (en) * | 2019-05-16 | 2019-07-23 | 武汉大学 | A kind of high-power compound PMOS tube equivalent circuit of high-performance low-voltage difference |
| CN110797937A (en) * | 2019-10-17 | 2020-02-14 | 南京金邦动力科技有限公司 | BMS charge and discharge management circuit |
| CN110854970A (en) * | 2019-12-23 | 2020-02-28 | 东莞市福洋电子有限公司 | Multi-stage protection charger charging auxiliary circuit |
-
2017
- 2017-02-15 CN CN201720136419.9U patent/CN206559081U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539712A (en) * | 2018-04-10 | 2018-09-14 | 苏州南江乐博机器人有限公司 | A kind of robot power supply input control device and input guard method |
| CN108512274A (en) * | 2018-04-20 | 2018-09-07 | 广州金升阳科技有限公司 | A kind of battery charger adaptive circuit |
| CN110048680A (en) * | 2019-05-16 | 2019-07-23 | 武汉大学 | A kind of high-power compound PMOS tube equivalent circuit of high-performance low-voltage difference |
| CN110797937A (en) * | 2019-10-17 | 2020-02-14 | 南京金邦动力科技有限公司 | BMS charge and discharge management circuit |
| CN110854970A (en) * | 2019-12-23 | 2020-02-28 | 东莞市福洋电子有限公司 | Multi-stage protection charger charging auxiliary circuit |
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