CN104518541A - Reverse-connection-preventive charging circuit and lamp - Google Patents
Reverse-connection-preventive charging circuit and lamp Download PDFInfo
- Publication number
- CN104518541A CN104518541A CN201310459365.6A CN201310459365A CN104518541A CN 104518541 A CN104518541 A CN 104518541A CN 201310459365 A CN201310459365 A CN 201310459365A CN 104518541 A CN104518541 A CN 104518541A
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- China
- Prior art keywords
- resistance
- charging
- module
- power supply
- charge power
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
Abstract
An embodiment of the invention discloses a reverse-connection-preventive charging circuit and a lamp. The reverse-connection-preventive charging circuit comprises a control module, a charging current supply module and a charging module, the control module is connected with the charging current supply module, one end of the charging current supply module is connected with an anode of a charging power source while the other end of the same is connected with an anode input end of the charging module, and a cathode input end of the charging module is connected with a cathode of the charging power source. By the reverse-connection-preventive charging circuit, when the charging power source is in reverse connection, charging can be stopped to achieve the objective of protecting the charging circuit. The reverse-connection-preventive charging circuit is simple in structure and high in efficiency.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of anti-reverse charging circuit and light fixture.
Background technology
Electric energy and our life closely bound up, the normal operation of the various electronic product such as electronic equipment, electronic instrument all be unable to do without electric energy, and a variety of electronic product can charge to electronic product by being connected with external power source, electric energy supplement.Such as, existing Chargeable torch, the electronic product such as mobile phone and calculator, can charge to electronic product by connecting external power source.In the process that these electronic products are charged; often there will be the charging positive pole negative input reversal connection of charge power supply and electronic product; during situation if there is charge power supply reversal connection; often burn out the battery in electronic product; or more seriously cause leakage of current; there is electric shock accidents, make troubles to user.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of anti-reverse charging circuit and light fixture, can realize when charge power supply reversal connection simply, stops charging, protection charging circuit.
In order to solve the problems of the technologies described above, embodiments provide a kind of anti-reverse charging circuit, comprising control module, charging current provides module and charging module; Described control module and described charging current provide wired in parallel, described charging current provides one end of module to connect the positive pole of charge power supply, described charging current provides the other end of module to connect the electrode input end of described charging module, and the negative input of described charging module connects the negative pole of charge power supply; If when charge power supply just connects, described control module controls described charging current and provides module place in circuit, and described charging current provides module to provide charging current for described charging module, and described charging module charges; If during charge power supply reversal connection, described control module controls described charging current and provides module short circuit, and described charging current provides module to stop providing charging current for described charging module, and described charging module stops charging
Wherein, described charging current provides module to comprise the first resistance; Described first resistance is in parallel with described control module, and one end of described first resistance connects the positive pole of charge power supply, and the other end of described first resistance connects the electrode input end of described charging module; If described first resistance access circuit, described first resistance provides charging current for described charging module, if described first resistive short, described first resistance stops providing charging current for described charging module.
Wherein, described control module comprises field effect transistor and the second resistance; The source electrode of described field effect transistor is connected with one end of described first resistance and the electrode input end of described charging module respectively, the drain electrode of described field effect transistor is connected with the other end of described first resistance and one end of described second resistance respectively, and the other end of described second resistance is connected with the grid of described field effect transistor and the negative pole of charge power supply respectively;
Wherein, described charging module comprises battery and the 3rd resistance; Described battery and described 3rd resistor coupled in parallel, the positive pole of described battery is connected with the source electrode of described field effect transistor, and the negative pole of described battery is connected with the negative pole of described charge power supply;
Wherein, described anti-reverse charging circuit also comprises triode and the 4th resistance, described second resistance connects charge power supply negative pole by described triode, the emitter of described triode is connected with the grid of described field effect transistor and described second resistance respectively, the collector electrode of described triode is connected with described charge power supply negative pole, the base stage of described triode is connected with one end of described 3rd resistance and one end of described 4th resistance respectively, described 3rd resistance connects charge power supply negative pole by described 4th resistance, the other end of described 3rd resistance is connected with the positive pole of described battery, the other end of described 4th resistance is connected with the negative pole of described battery and charge power supply negative pole respectively.
Wherein, described triode is NPN type triode.
Wherein, described field effect transistor is nmos type field effect transistor.
Correspondingly, the embodiment of the present invention additionally provides a kind of light fixture, comprises above-mentioned anti-reverse charging circuit.
Implement the embodiment of the present invention, there is following beneficial effect:
Anti-reverse charging circuit of the present invention when charge power supply reversal connection, can control charging current and provides module short circuit, stop providing electric current to charging module; charging module stops charging; reach the object protecting charging circuit when charge power supply reversal connection, circuit structure is simple, and efficiency is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the block diagram of a kind of anti-reverse charging circuit that the embodiment of the present invention provides;
Fig. 2 is the circuit theory diagrams of a kind of anti-reverse charging circuit that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, in subsequent embodiment of the present invention, first resistance can adopt resistance R4 to represent, second resistance can adopt resistance R1 to represent, 3rd resistance can adopt resistance R3 to represent, the 4th resistance can adopt resistance R2 to represent, triode can adopt triode Q1 to represent, field effect transistor can adopt field effect transistor Q2 to represent, battery can adopt battery BT to represent.
Please refer to Fig. 1, be the block diagram of a kind of anti-reverse charging circuit that the embodiment of the present invention provides, comprise control module, charging current provides module and charging module; Described control module and described charging current provide model calling, described charging current provides one end of module to connect the positive pole of charge power supply, described charging current provides the other end of module to connect the electrode input end of described charging module, and the negative input of described charging module connects the negative pole of charge power supply; If when charge power supply just connects, described control module controls described charging current and provides module place in circuit, and described charging current provides module to provide charging current for described charging module, and described charging module charges; If during charge power supply reversal connection, described control module controls described charging current and provides module short circuit, and described charging current provides module to stop providing charging current for described charging module, and described charging module stops charging.
Referring to Fig. 2, is the circuit theory diagrams of a kind of anti-reverse charging circuit that the embodiment of the present invention provides.
In the present embodiment, charging current provides module to comprise resistance R4, and resistance R4 is connected with control module, and one end of resistance R4 is connected with the electrode input end of charge power supply, and the other end of resistance R4 is connected with the electrode input end of charging module.
If when charge power supply just connects, control module controlling resistance R4 place in circuit, charging current flows to from the electrode input end of charge power supply, flow through resistance R4, flow to charging module again, resistance R4 provides charging current, to realize charging to charging module for charging module; If during charge power supply reversal connection; then control module controlling resistance R4 short circuit; when resistance R4 short circuit; then not having electric current to flow through resistance R4, is namely that resistance R4 can not provide charging current for charging module, and charging module stops charging; protection charging circuit; when preventing charge power supply reversal connection, charging current is excessive, burns out battery.
In the present embodiment, control module comprises field effect transistor Q2 and resistance R1, the drain electrode of field effect transistor Q2 is connected with one end of resistance R4 and one end of resistance R1 respectively, one end of resistance R4 is connected with the positive pole of charge power supply, the other end of resistance R1 is connected with the negative pole of charge power supply and the grid of field effect transistor Q2 respectively, and the source electrode of field effect transistor Q2 is connected with the other end of resistance R4 and charging module respectively.
If when charge power supply just connects, that is to say that the drain electrode of field effect transistor Q2 connects the positive pole of charge power supply, the grid of field effect transistor Q2 connects the negative pole of charge power supply, field effect transistor Q2 ends, charging current flows to from charge power supply electrode input end, and flow to charging current the R4 of the resistance in module is provided, then flow to charging module, charging module is charged, if during charge power supply reversal connection, that is to say that the negative pole of charge power supply connects the drain electrode of field effect transistor Q2, the grid of field effect transistor Q2 connects the positive pole of charge power supply, the grid of field effect transistor Q2 is owing to there being grid voltage, so field effect transistor Q2 conducting, resistance R1 provides grid voltage for field effect transistor Q2, field effect transistor Q2 conducting, charging current is provided the short circuit of the resistance R4 in module, but charging module two ends are made to have voltage not have charging current, charging module stops charging owing to losing charging current, the place in circuit of field effect transistor Q2 major control resistance R4 or short circuit reach the charging or stopping charging that control charging module.
In the present embodiment, charging module comprises battery BT and current-limiting resistance R3, and resistance R3 is in parallel with battery BT, and the positive pole of battery BT is connected with the source electrode of resistance R4 and field effect transistor Q2 respectively, and the negative pole of battery BT is connected with the negative pole of charge power supply.
If when charge power supply just connects, charging current provides the electric current that in module, resistance R4 provides to flow to charging module, because in charging module, the resistance value ratio of current-limiting resistance R3 is larger, so the electric current flowing to current-limiting resistance R3 is very little, charging current provides the electric current provided in module substantially all to flow to battery BT, charges to battery BT; If during charge power supply reversal connection, charging current provides the resistance R4 in module to be shorted, and charging module loses the charging current that charging current provides module to provide, and there is charging voltage at battery BT two ends, but lose charging current, stops charging.
Preferred further, on above-mentioned execution mode basis, please refer to Fig. 2, above-mentioned anti-reverse charging circuit can also comprise triode Q1 and resistance R2, resistance R1 is connected with the negative pole of charge power supply by triode Q1, resistance R3 is connected with charge power supply negative pole by resistance R2, the emitter of triode Q1 is connected with the grid of resistance R1 and field effect transistor Q2 respectively, the base stage of triode Q1 is connected with one end of resistance R3 and one end of resistance R2 respectively, the other end of resistance R3 is connected with the positive pole of battery BT, the other end of resistance R2 is connected with the negative pole of battery BT and the negative pole of charge power supply respectively.
If when charge power supply just connects, resistance R2 provides base voltage for triode Q1, if during charge power supply reversal connection, resistance R3 provides base voltage for triode Q1, and triode Q1 is mainly in order to improve the efficiency of this circuit working.
The circuit working process for anti-reverse charging circuit of the embodiment of the present invention is as follows:
When connecting charge power supply, charge power supply just connects, namely be charge power supply positive pole connect charging current module is provided, the negative pole of charge power supply connects the negative pole of battery, field effect transistor Q2 cut-off in control module, charging current flows to charging current and provides the R4 of the resistance in module, then flows to charging module by resistance R4, and charging module charges to battery BT owing to there being charging current.
If during charge power supply reversal connection, namely be charge power supply negative pole connect charging current module is provided, the positive pole of charge power supply connects the negative pole of battery, negative pole due to charge power supply connects the drain electrode of field effect transistor Q2, the grid of field effect transistor Q2 has voltage, so field effect transistor Q2 conducting, charging current is made to provide the short circuit of the resistance R4 in module, charging resistor R4 short circuit just makes charging module lack charging current, charging module is equivalent to open circuit, there is charging voltage at charging module two ends, but do not have charging current, and stop charging.
Anti-reverse charging circuit of the present invention when charge power supply reversal connection, can control charging current and provides module short circuit, stop providing electric current to charging module; charging module stops charging; reach the object protecting charging circuit when charge power supply reversal connection, circuit structure is simple, and efficiency is high.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (8)
1. an anti-reverse charging circuit, is characterized in that, comprises control module, charging current provides module and charging module;
Described control module and described charging current provide model calling, described charging current provides one end of module to connect the positive pole of charge power supply, described charging current provides the other end of module to connect the electrode input end of described charging module, and the negative input of described charging module connects the negative pole of charge power supply;
If when charge power supply just connects, described control module controls described charging current and provides module place in circuit, and described charging current provides module to provide charging current for described charging module, and described charging module charges; If during charge power supply reversal connection, described control module controls described charging current and provides module short circuit, and described charging current provides module to stop providing charging current for described charging module, and described charging module stops charging.
2. anti-reverse charging circuit as claimed in claim 1, is characterized in that, described charging current provides module to comprise the first resistance;
Described first resistance is connected with described control module, and one end of described first resistance connects the positive pole of charge power supply, and the other end of described first resistance connects the electrode input end of described charging module;
If described first resistance access circuit, described first resistance provides charging current for described charging module, if described first resistive short, described first resistance stops providing charging current for described charging module.
3. anti-reverse charging circuit as claimed in claim 2, is characterized in that, described control module comprises field effect transistor and the second resistance;
The source electrode of described field effect transistor is connected with one end of described first resistance and the electrode input end of described charging module respectively, the drain electrode of described field effect transistor is connected with the other end of described first resistance and one end of described second resistance respectively, and the other end of described second resistance is connected with the grid of described field effect transistor and the negative pole of charge power supply respectively.
4. anti-reverse charging circuit as claimed in claim 2, is characterized in that, described charging module comprises battery and the 3rd resistance;
Described battery and described 3rd resistor coupled in parallel, the positive pole of described battery is connected with the source electrode of described field effect transistor, and the negative pole of described battery is connected with the negative pole of described charge power supply.
5. anti-reverse charging circuit as claimed in claim 4, is characterized in that, described circuit also comprises triode and the 4th resistance;
Described second resistance connects charge power supply negative pole by described triode, the emitter of described triode is connected with the grid of described field effect transistor and described second resistance respectively, the collector electrode of described triode is connected with described charge power supply negative pole, the base stage of described triode is connected with one end of described 3rd resistance and one end of described 4th resistance respectively, described 3rd resistance connects charge power supply negative pole by described 4th resistance, the other end of described 3rd resistance is connected with the positive pole of described battery, the other end of described 4th resistance is connected with the negative pole of described battery and charge power supply negative pole respectively.
6. anti-reverse charging circuit as claimed in claim 5, is characterized in that, described triode is NPN type triode.
7. anti-reverse charging circuit as claimed in claim 6, is characterized in that, described field effect transistor is nmos type field effect transistor.
8. a light fixture, is characterized in that, comprises the anti-reverse charging circuit described in 1 to 7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310459365.6A CN104518541A (en) | 2013-09-26 | 2013-09-26 | Reverse-connection-preventive charging circuit and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310459365.6A CN104518541A (en) | 2013-09-26 | 2013-09-26 | Reverse-connection-preventive charging circuit and lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104518541A true CN104518541A (en) | 2015-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310459365.6A Pending CN104518541A (en) | 2013-09-26 | 2013-09-26 | Reverse-connection-preventive charging circuit and lamp |
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| Country | Link |
|---|---|
| CN (1) | CN104518541A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656117A (en) * | 2016-01-18 | 2016-06-08 | 深圳市中孚能电气设备有限公司 | Charging circuit and charging method thereof |
| CN114825598A (en) * | 2022-06-29 | 2022-07-29 | 卧安科技(深圳)有限公司 | Low-power-consumption intelligent lock and anti-reverse-heating standby circuit and anti-reverse-connecting method of intelligent equipment |
-
2013
- 2013-09-26 CN CN201310459365.6A patent/CN104518541A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656117A (en) * | 2016-01-18 | 2016-06-08 | 深圳市中孚能电气设备有限公司 | Charging circuit and charging method thereof |
| CN114825598A (en) * | 2022-06-29 | 2022-07-29 | 卧安科技(深圳)有限公司 | Low-power-consumption intelligent lock and anti-reverse-heating standby circuit and anti-reverse-connecting method of intelligent equipment |
| CN114825598B (en) * | 2022-06-29 | 2022-10-14 | 卧安科技(深圳)有限公司 | Low-power-consumption intelligent lock and anti-reverse-heating standby circuit and anti-reverse-connecting method of intelligent equipment |
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Application publication date: 20150415 |