CN208001163U - A kind of battery charge-discharge circuit with short circuit and reversal connection protection function - Google Patents
A kind of battery charge-discharge circuit with short circuit and reversal connection protection function Download PDFInfo
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- CN208001163U CN208001163U CN201721497321.2U CN201721497321U CN208001163U CN 208001163 U CN208001163 U CN 208001163U CN 201721497321 U CN201721497321 U CN 201721497321U CN 208001163 U CN208001163 U CN 208001163U
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- switch pipe
- comparator
- discharge
- circuit
- partial pressure
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model is related to a kind of battery charge-discharge circuits with short circuit and reversal connection protection function, including discharge switch pipe(Q1)With charge switch pipe(Q2), two switching tube direction differential concatenations are together;It further include comparator(U1), comparator(U1)In-phase input end connection input voltage divide branch;Comparator(U1)Inverting input connecting valve tube voltage divide branch;The input voltage partial pressure branch is used for input voltage in parallel;The switch tube voltage partial pressure branch is used for two switch tube voltages in parallel;Comparator(U1)Output end and discharge switch pipe(Q1)Grid be connected.In moment reversal connection or short circuit in the case of caused high current, according to the output of comparator, discharge switch pipe is made to end, to be damaged to battery and interface, the power attenuation of battery will not be caused, so as to ensure normal operation circuit.
Description
Technical field
The utility model is related to a kind of battery charge-discharge circuits with short circuit and reversal connection protection function.
Background technology
Many batteries do not allow reversal connection, and short circuit is even more the situation that most circuits needs are absolutely avoided, because short
Immediate current is very big under road or reversal connection state, is easy to damage out splice going splice and battery, not in the case where electric current is excessive
Moment, in real time protection can be realized, to cause fault, cisco unity malfunction even can cause the situations such as fire.Cause
How this, reach the developing direction that battery and circuit protection under aforesaid state are always industry.Currently, general for short circuit
It is by the way of fuse, the instantaneous large-current meeting fuse wire generated in the short-circuit state reaches the mesh of protection circuit
's.However, this mode has also cut off circuit while protecting circuit so that circuit can not work normally, and need replacing
Fuse circuit could work.
Utility model content
The purpose of this utility model is to provide a kind of battery charge-discharge circuit with short circuit and reversal connection protection function, to
It solves the problems, such as to damage circuit when short circuit and reversal connection.
To achieve the above object, a kind of scheme of the utility model is:
A kind of battery charge-discharge circuit with short circuit and reversal connection protection function, main circuit includes discharge switch pipe(Q1)With
Charge switch pipe(Q2), two switching tube direction differential concatenations are together;Two switching tubes be connected to direct current input cathode with it is straight
Between stream output negative pole;Further include a control unit, control unit includes comparator(U1);Comparator(U1)Homophase input
End connection input voltage divides branch;Comparator(U1)Inverting input connecting valve tube voltage divide branch;The input
Voltage branch is used for input voltage in parallel;The switch tube voltage partial pressure branch is used for two switch tube voltages in parallel;Compare
Device(U1)Output end and discharge switch pipe(Q1)Grid be connected.
Discharge switch pipe as a further improvement of the utility model,(Q1)Connect direct current input cathode and charge switch pipe
(Q2);Charge switch pipe(Q2)It respectively connected direct current output cathode and discharge switch pipe(Q1).
The switch tube voltage partial pressure branch route first resistor as a further improvement of the utility model,(R1), second
Resistance(R2)It is in series;The input voltage partial pressure branch route 3rd resistor(R3), the 4th resistance(R4)It is in series;Compare
Device(U1)In-phase input end connect 3rd resistor(R3), the 4th resistance(R4)Series connection point(a);Comparator(U1)Reverse phase it is defeated
Enter end connection first resistor(R1), second resistance(R2)Series connection point(b).
The discharge switch pipe, charge switch pipe are metal-oxide-semiconductor as a further improvement of the utility model,.
Another scheme of the utility model is:A kind of battery charge-discharge circuit with short circuit and reversal connection protection function,
Main circuit includes discharge switch pipe(Q1)With charge switch pipe(Q2), two switching tube direction differential concatenations are together;Two are opened
Pipe is closed to be connected between direct current input anode and direct current output anode;Further include a control unit, control unit includes comparing
Device(U1);Comparator(U1)In-phase input end connecting valve tube voltage divide branch;Comparator(U1)Inverting input connect
Connect input voltage partial pressure branch;The input voltage partial pressure branch is used for input voltage in parallel;The switch tube voltage partial pressure branch
Road is used for two switch tube voltages in parallel;Comparator(U1)Output end and discharge switch pipe(Q1)Grid be connected.
Discharge switch pipe as a further improvement of the utility model,(Q1)Connect direct current output anode and charge switch pipe
(Q2);Charge switch pipe(Q2)Connect direct current input anode and discharge switch pipe(Q1).
The switch tube voltage partial pressure branch route first resistor as a further improvement of the utility model,(R1), second
Resistance(R2)It is in series;The input voltage partial pressure branch route 3rd resistor(R3), the 4th resistance(R4)It is in series;Compare
Device(U1)In-phase input end connect first resistor(R1), second resistance(R2)Series connection point(b);Comparator(U1)Reverse phase it is defeated
Enter end connection 3rd resistor(R3), the 4th resistance(R4)Series connection point(a).
The discharge switch pipe, charge switch pipe are metal-oxide-semiconductor as a further improvement of the utility model,.
The utility model in the case of caused high current, according to the output of comparator, makes in moment reversal connection or short circuit
Discharge switch pipe ends, and to be damaged to battery and interface, will not cause the power attenuation of battery, so as to
Ensure normal operation circuit.
Description of the drawings
Fig. 1 is the circuit diagram of embodiment 1;
Fig. 2 is the circuit diagram of embodiment 2.
Specific implementation mode
The utility model is described in more detail below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figure 1, a kind of battery charge-discharge circuit with short circuit and reversal connection protection function, main circuit includes electric discharge
Metal-oxide-semiconductor Q1 and charging metal-oxide-semiconductor Q2, two metal-oxide-semiconductor direction differential concatenations are together.Each metal-oxide-semiconductor is included, and there are one parasitisms two
Pole pipe.Two metal-oxide-semiconductors are connected to direct current input cathode(That is battery cathode)Between direct current output cathode;The metal-oxide-semiconductor Q1 that discharges connects
Connect direct current input cathode and charging metal-oxide-semiconductor Q2;Charging metal-oxide-semiconductor Q2 respectively connected direct current output cathode and electric discharge metal-oxide-semiconductor Q1.
Further include a control unit, control unit includes comparator U1, resistance R1, resistance R2, resistance R3, resistance R4.
A points between the in-phase input end connection R3 and R4 of comparator U1, the inverting input of comparator U1 connect the b between R1 and R2
Point;R3, R4 constitute series arm, and and cell parallel;R1, R2 also constitute series arm, in parallel with two metal-oxide-semiconductors.Comparator
The output end of U1 is connected with the grid of electric discharge metal-oxide-semiconductor Q1.
Circuit operation principle is as follows:
Under normal wiring state, direct current input positive and negative anodes have normal power supply, and it is defeated that U1 in-phase input ends a point voltages are more than reverse phase
It is high level to enter to hold b point voltages, U1 outputs, and electric discharge metal-oxide-semiconductor Q1 is opened.
Under direct current output positive and negative anodes short-circuit condition, the voltage of a points is equal with the voltage swing of b points, and comparator exports low electricity
It is flat, electric discharge metal-oxide-semiconductor Q1 is closed, realizes short-circuit protection function.
When reversal connection state, that is, when exporting positive and negative anodes with external connection battery or error-polarity connection of power supply, output negative pole current potential is more than defeated
Go out anode, the voltage of a points is less than the voltage of b points at this time, and comparator exports low level, closes electric discharge metal-oxide-semiconductor Q1, realizes that short circuit is protected
Protective function.
Embodiment 2
As shown in Fig. 2, a kind of battery charge-discharge circuit with short circuit and reversal connection protection function, main circuit includes electric discharge
Metal-oxide-semiconductor Q1 and charging metal-oxide-semiconductor Q2, two metal-oxide-semiconductor direction differential concatenations are together.Each metal-oxide-semiconductor is included, and there are one parasitisms two
Pole pipe.
Difference lies in two metal-oxide-semiconductors are connected to direct current input anode with embodiment 1(That is anode)Just with direct current output
Between pole;I.e.:Discharge metal-oxide-semiconductor Q1 connection direct current output anodes and charging metal-oxide-semiconductor Q2;Charging metal-oxide-semiconductor Q2 respectively connected direct current
Input anode and charging metal-oxide-semiconductor Q1.
The present embodiment also further includes a control unit, and control unit includes comparator U1, resistance R1, resistance R2, resistance
R3, resistance R4.
It is with 1 difference of embodiment, the b points between the in-phase input end connection R1 and R2 of comparator U1, comparator U1's
Inverting input connects a points between R3 and R4.R3, R4 constitute series arm, and and cell parallel;R1, R2 also constitute series connection
Branch, it is in parallel with two metal-oxide-semiconductors.The output end of comparator U1 is connected with the grid of electric discharge metal-oxide-semiconductor Q1.
Circuit operation principle is as follows:
Under normal wiring state, direct current input positive and negative anodes have normal power supply, and it is defeated that U1 in-phase input ends b point voltages are more than reverse phase
It is high level to enter to hold a point voltages, U1 outputs, and electric discharge metal-oxide-semiconductor Q1 is opened.
Under direct current output positive and negative anodes short-circuit condition, the voltage of a points is equal with the voltage swing of b points, and comparator exports low electricity
It is flat, electric discharge metal-oxide-semiconductor Q1 is closed, realizes short-circuit protection function.
When reversal connection state, that is, when exporting positive and negative anodes with external connection battery or error-polarity connection of power supply, output negative pole current potential is more than defeated
Go out anode, the voltage of b points is less than the voltage of a points at this time, and comparator exports low level, closes electric discharge metal-oxide-semiconductor Q1, realizes that short circuit is protected
Protective function.
With embodiment 2, charge-discharge circuit is controlled embodiment 1 using MOS, can also as other embodiment
Using other kinds of switching tube.
Be presented above the utility model is related to specific implementation mode, but the utility model is not limited to described reality
Apply mode.Under the thinking that the utility model provides, to above-mentioned by the way of being readily apparent that those skilled in the art
Technological means in embodiment is converted, is replaced, is changed, and play the role of and the utility model in relevant art hand
The purpose of utility model that section is essentially identical, realizes is also essentially identical, and the technical solution formed in this way is carried out to above-described embodiment
What fine tuning was formed, this technical solution is still fallen in the scope of protection of the utility model.
Claims (8)
1. a kind of battery charge-discharge circuit with short circuit and reversal connection protection function, which is characterized in that including discharge switch pipe
(Q1)With charge switch pipe(Q2), two switching tube direction differential concatenations are together;It is negative that two switching tubes are connected to direct current input
Between pole and direct current output cathode;Further include a control unit, control unit includes comparator(U1);Comparator(U1)It is same
Phase input terminal connects input voltage and divides branch;Comparator(U1)Inverting input connecting valve tube voltage divide branch;Institute
It states input voltage partial pressure branch and is used for input voltage in parallel;The switch tube voltage partial pressure branch is used for two switching tubes electricity in parallel
Pressure;Comparator(U1)Output end and discharge switch pipe(Q1)Grid be connected.
2. a kind of battery charge-discharge circuit with short circuit and reversal connection protection function according to claim 1, feature exist
In discharge switch pipe(Q1)Connect direct current input cathode and charge switch pipe(Q2);Charge switch pipe(Q2)Connect direct current output
Cathode and discharge switch pipe(Q1).
3. a kind of battery charge-discharge circuit with short circuit and reversal connection protection function according to claim 2, feature exist
In the switch tube voltage partial pressure branch route first resistor(R1), second resistance(R2)It is in series;The input voltage partial pressure
Branch route 3rd resistor(R3), the 4th resistance(R4)It is in series;Comparator(U1)In-phase input end connect 3rd resistor
(R3), the 4th resistance(R4)Series connection point(a);Comparator(U1)Inverting input connect first resistor(R1), second resistance
(R2)Series connection point(b).
4. a kind of battery charge-discharge circuit with short circuit and reversal connection protection function according to claim 1 or 2 or 3,
It is characterized in that, the discharge switch pipe, charge switch pipe are metal-oxide-semiconductor.
5. a kind of battery charge-discharge circuit with short circuit and reversal connection protection function, which is characterized in that main circuit includes that electric discharge is opened
Guan Guan(Q1)With charge switch pipe(Q2), two switching tube direction differential concatenations are together;It is defeated that two switching tubes are connected to direct current
Enter between anode and direct current output anode;Further include a control unit, control unit includes comparator(U1);Comparator(U1)
In-phase input end connecting valve tube voltage divide branch;Comparator(U1)Inverting input connection input voltage partial pressure branch
Road;The input voltage partial pressure branch is used for input voltage in parallel;The switch tube voltage partial pressure branch is switched for parallel connection two
Tube voltage;Comparator(U1)Output end and discharge switch pipe(Q1)Grid be connected.
6. a kind of battery charge-discharge circuit with short circuit and reversal connection protection function according to claim 5, feature exist
In discharge switch pipe(Q1)Connect direct current output anode and charge switch pipe(Q2);Charge switch pipe(Q2)Connect direct current input
Anode and discharge switch pipe(Q1).
7. a kind of battery charge-discharge circuit with short circuit and reversal connection protection function according to claim 6, feature exist
In the switch tube voltage partial pressure branch route first resistor(R1), second resistance(R2)It is in series;The input voltage partial pressure
Branch route 3rd resistor(R3), the 4th resistance(R4)It is in series;Comparator(U1)In-phase input end connect first resistor
(R1), second resistance(R2)Series connection point(b);Comparator(U1)Inverting input connect 3rd resistor(R3), the 4th resistance
(R4)Series connection point(a).
8. a kind of battery charge-discharge circuit with short circuit and reversal connection protection function according to claim 5 or 6 or 7,
It is characterized in that, the discharge switch pipe, charge switch pipe are metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721497321.2U CN208001163U (en) | 2017-11-11 | 2017-11-11 | A kind of battery charge-discharge circuit with short circuit and reversal connection protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721497321.2U CN208001163U (en) | 2017-11-11 | 2017-11-11 | A kind of battery charge-discharge circuit with short circuit and reversal connection protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208001163U true CN208001163U (en) | 2018-10-23 |
Family
ID=63836416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721497321.2U Active CN208001163U (en) | 2017-11-11 | 2017-11-11 | A kind of battery charge-discharge circuit with short circuit and reversal connection protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208001163U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111245235A (en) * | 2020-03-05 | 2020-06-05 | 广州市星翼电子科技有限公司 | Bidirectional power supply circuit supporting reverse connection protection and short circuit protection |
| CN112994188A (en) * | 2021-04-27 | 2021-06-18 | 上海南麟电子股份有限公司 | Reverse connection protection circuit for rechargeable battery and battery protection chip |
-
2017
- 2017-11-11 CN CN201721497321.2U patent/CN208001163U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111245235A (en) * | 2020-03-05 | 2020-06-05 | 广州市星翼电子科技有限公司 | Bidirectional power supply circuit supporting reverse connection protection and short circuit protection |
| CN112994188A (en) * | 2021-04-27 | 2021-06-18 | 上海南麟电子股份有限公司 | Reverse connection protection circuit for rechargeable battery and battery protection chip |
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