CN209200707U - A kind of emergency light charging circuit with charging protection function - Google Patents

Abstract

The utility model provides a kind of emergency light charging circuit with charging protection function, including switching power circuit and charging control circuit, rechargeable battery working condition is analyzed by singlechip control chip U3 sample detecting charge circuit voltage when circuit works and by program, when rechargable battery is overcharged by the on off operating mode of single-chip microcontroller control triode Q1 and triode Q3, to realize charging protection function when emergency light charging, the utility model solves the function that existing emergency light charging circuit does not have charge protection, it is easy to appear and overcharges, the problem of so as to cause circuit components damage, circuit has stability good, high reliability.

Description

A kind of emergency light charging circuit with charging protection function

Technical field

The utility model is a kind of emergency light charging circuit with charging protection function, belongs to emergency light apparatus field.

Background technique

The general name of the lamps and lanterns of emergency lighting when emergency light, fire emergency system mainly include accident emergency illumination, Escape hatch mark and indicator light are guidance trapped person evacuation or expansion in the case of fire after normal illumination dump Fire fighting and rescue action and be arranged, existing emergency light charging circuit does not have the function of charge protection, is easy to appear and overcharges Situation, so as to cause circuit components damage.

Utility model content

In view of the deficienciess of the prior art, the utility model aim is to provide a kind of emergency with charging protection function Lamp charging circuit, to solve the problems mentioned in the above background technology, the utility model is easy to use, realizes emergency light charging When charging protection function, stability is good, high reliablity.

To achieve the goals above, the utility model is achieved through the following technical solutions: a kind of have charger The emergency light charging circuit of protective function, including switching power circuit and charging control circuit, the switching power circuit include opening No. 1 of powered-down source chip U1, the switching power source chip U1, No. 2 pin connected by conducting wire and be connected to full-wave rectification No. 3 pins of No. 4 pins of bridge, the switching power source chip U1 are connected by No. 4 pins of capacitor C3 and full-wave rectification bridge, institute No. 4 the 1st branches of pin for stating switching power source chip U1 are connected by No. 4 pins of capacitor C4 and full-wave rectification bridge, and the 2nd branch is logical It crosses resistance R2, diode D6 to connect with No. 4 pin of high frequency transformer T2 primary side, No. 2 pins of high frequency transformer T2 primary side It is connect with No. 4 pins of full-wave rectification bridge, No. 5 pins of the switching power source chip U1 pass through resistance R3 and the 4 of wave rectifier bridge The connection of number pin, No. 6 of the switching power source chip U1, No. 7, No. 8 pins are connected by conducting wire and are connected to the sun of diode D5 Pole, No. 1 pin of the full-wave rectification bridge connect the end L of industrial-frequency alternating current by fuse FUSE, and No. 3 of the full-wave rectification bridge Pin connects the N-terminal of industrial-frequency alternating current by conducting wire, and No. 2 the 1st branches of pin of the full-wave rectification bridge connect all-wave by capacitor C1 No. 4 pins of rectifier bridge, the 2nd branch connect the cathode of diode D5 by resistance R1, and the 3rd branch meets diode D5 by capacitor C2 Cathode, the 4th branch connects No. 1 pin of high frequency transformer T2 primary side, and No. 3 pins of high frequency transformer T2 primary side connect two poles The anode of pipe D5, described No. 7 pins of high frequency transformer T2 secondary side connect the anode of diode D7, high frequency transformer T2 secondary side 5 Number the 1st branch of pin connects the cathode of diode D7 by capacitor C5, and the 2nd branch connects singlechip chip by zener diode ZD1 No. 4 pins of U3, the 3rd branch pass through wired earth；The charging control circuit includes singlechip chip U3, the monolithic machine core No. 1 pin of piece U3 connects ground terminal and the ground connection of three terminal regulator chip U2, No. 4 pins of the singlechip chip U3 the 1st Road connects the cathode of zener diode DZ1, and the 2nd branch connects the cathode of diode D7 by resistance R4 and is connected to three terminal regulator chip No. 6 pins of the input terminal of U2, the singlechip chip U3 are grounded by switch SW1, No. 7 pins of the singlechip chip U3 It is grounded by resistance R5, light emitting diode KED1, No. 10 pins of the singlechip chip U3 meet triode Q3 by resistance R8 Base stage, the emitter of triode Q3 is grounded by Light-emitting diode LED 2, resistance R7, and triode Q3 collector passes through fuse FUSE connects the anode of rechargeable battery BATT, the cathode ground connection of rechargeable battery BATT, and No. 11 pins of the singlechip chip U3 lead to The base stage that resistance R6 meets triode Q1 is crossed, the emitter of triode Q1 connects the collector of triode Q3, the collector of triode Q1 The cathode of diode D7 is connect, No. 13 the 1st branches of pin of the singlechip chip U3 are grounded by resistance R9, and the 2nd branch passes through Resistance R10 connects the collector of triode Q3, and No. 16 pins of the singlechip chip U3 connect three terminal regulator chip by conducting wire The output end of U2, three terminal regulator core U2 piece output end are grounded by capacitor C6, and three terminal regulator core U2 piece input terminal is by leading Line connects the cathode of diode D7.

Further, the full-wave rectification bridge is made of diode D1, diode D2, diode D3 and diode D4.

Further, the chip model of the power supply control chip U1 is SDH8030, the three terminal regulator chip U2's Chip model is 7330, and the chip model of the singlechip chip U3 is AT89C52.

The electricity the utility model has the beneficial effects that a kind of emergency light with charging protection function of the utility model charges Singlechip chip U3 is arranged in road, charging control circuit, passes through singlechip control chip U3 sample detecting rechargeable battery work shape State is controlled by single-chip microcontroller when rechargable battery is overcharged and disconnects triode Q1 stopping charging, and controls LED2 by triode Q3 Luminous alarm, the design achieves charging protection functions when emergency light charging, solve existing emergency light charging circuit not The problem of having the function of charge protection, be easy to appear the case where overcharging, being damaged so as to cause circuit components.

Detailed description of the invention

Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model Sign, objects and advantages will become more apparent upon:

Fig. 1 is a kind of circuit diagram of the emergency light charging circuit with charging protection function of the utility model.

Specific embodiment

To be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, below In conjunction with specific embodiment, the utility model is further described.

Referring to Fig. 1, the utility model provides a kind of technical solution: a kind of emergency light charging with charging protection function Circuit, including switching power circuit and charging control circuit, the switching power circuit includes switching power source chip U1, described to open No. 1 of powered-down source chip U1, No. 2 pin connected by conducting wire and be connected to No. 4 pins of full-wave rectification bridge, the switch No. 3 pins of power supply chip U1 are connected by No. 4 pins of capacitor C3 and full-wave rectification bridge, and the 4 of the switching power source chip U1 Number the 1st branch of pin is connected by No. 4 pins of capacitor C4 and full-wave rectification bridge, the 2nd branch by resistance R2, diode D6 with No. 4 of No. 4 pin connection of high frequency transformer T2 primary side, No. 2 pins of high frequency transformer T2 primary side and full-wave rectification bridge are drawn No. 5 pins of foot connection, the switching power source chip U1 are connect by resistance R3 with No. 4 pins of wave rectifier bridge, the switch No. 6 of power supply chip U1, No. 7, No. 8 pins connect and be connected to the anode of diode D5 by conducting wire, the 1 of the full-wave rectification bridge Number pin connects the end L of industrial-frequency alternating current by fuse FUSE, and No. 3 pins of the full-wave rectification bridge connect power frequency by conducting wire and hand over The N-terminal of galvanic electricity, No. 2 the 1st branches of pin of the full-wave rectification bridge connect No. 4 pins of full-wave rectification bridge by capacitor C1, and the 2nd Road connects the cathode of diode D5 by resistance R1, and the 3rd branch connects the cathode of diode D5 by capacitor C2, and the 4th branch connects high frequency No. 1 pin of transformer T2 primary side, No. 3 pins of high frequency transformer T2 primary side connect the anode of diode D5, the high frequency No. 7 pins of transformer T2 secondary side connect the anode of diode D7, and No. 5 the 1st branches of pin of high frequency transformer T2 secondary side pass through electricity Hold the cathode that C5 meets diode D7, the 2nd branch connects No. 4 pins of singlechip chip U3, the 3rd branch by zener diode ZD1 Pass through wired earth；The charging control circuit includes singlechip chip U3, and No. 1 pin of the singlechip chip U3 connects three ends The ground terminal and ground connection, No. 4 the 1st branches of pin of the singlechip chip U3 of voltage regulator chip U2 connects zener diode DZ1's Cathode, the 2nd branch connect the cathode of diode D7 by resistance R4 and are connected to the input terminal of three terminal regulator chip U2, the monolithic No. 6 pins of machine core piece U3 are grounded by switch SW1, and No. 7 pins of the singlechip chip U3 pass through resistance R5, light-emitting diodes Pipe KED1 ground connection, No. 10 pins of the singlechip chip U3 connect the base stage of triode Q3, the hair of triode Q3 by resistance R8 Emitter-base bandgap grading is grounded by Light-emitting diode LED 2, resistance R7, and triode Q3 collector meets rechargeable battery BATT by fuse FUSE Anode, the cathode ground connection of rechargeable battery BATT, No. 11 pins of the singlechip chip U3 meet triode Q1 by resistance R6 Base stage, the emitter of triode Q1 connects the collector of triode Q3, and the collector of triode Q1 meets the cathode of diode D7, institute No. 13 the 1st branches of pin for stating singlechip chip U3 are grounded by resistance R9, and the 2nd branch connects triode Q3's by resistance R10 Collector, No. 16 pins of the singlechip chip U3 connect the output end of three terminal regulator chip U2, three-terminal voltage-stabilizing by conducting wire Device core U2 piece output end is grounded by capacitor C6, and three terminal regulator core U2 piece input terminal connects the cathode of diode D7 by conducting wire, When circuit works, singlechip chip U3 acquires charge circuit voltage signal, and then the program inside singlechip chip U3 is to acquisition To voltage signal analyzed and handled, then singlechip chip U3 outputs level signals are to triode Q1 and triode The conducting and shutdown of Q3 is controlled, to realize charging protection function when emergency light charging.

Full-wave rectification bridge is made of diode D1, diode D2, diode D3 and diode D4.

The chip model of power supply control chip U1 is SDH8030, and the chip model of three terminal regulator chip U2 is 7330, single The chip model of piece machine core piece U3 is AT89C52.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, for For those skilled in the art, it is clear that the present invention is not limited to the details of the above exemplary embodiments, and without departing substantially from this In the case where the spirit or essential attributes of utility model, the utility model can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is by institute Attached claim rather than above description limit, it is intended that will fall within the meaning and scope of the equivalent elements of the claims All changes are embraced therein.It should not treat any reference in the claims as limiting related right It is required that.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (2)

1. a kind of emergency light charging circuit with charging protection function, including switching power circuit and charging control circuit, Be characterized in that: the switching power circuit includes switching power source chip U1, and No. 1, No. 2 of the switching power source chip U1 is drawn Foot connects by conducting wire and is connected to No. 4 pins of full-wave rectification bridge, and No. 3 pins of the switching power source chip U1 pass through capacitor The connection of No. 4 pins of C3 and full-wave rectification bridge, No. 4 the 1st branches of pin of the switching power source chip U1 are by capacitor C4 and entirely No. 4 pins of wave rectifier bridge connect, and the 2nd branch passes through resistance R2, diode D6 and No. 4 pin of high frequency transformer T2 primary side No. 4 pins of connection, No. 2 pins of high frequency transformer T2 primary side and full-wave rectification bridge connect, and the 5 of the switching power source chip U1 Number pin is connect by resistance R3 with No. 4 pins of wave rectifier bridge, No. 6 of the switching power source chip U1, No. 7, No. 8 pins lead to The anode that conducting wire connects and is connected to diode D5 is crossed, No. 1 pin of the full-wave rectification bridge connects power frequency by fuse FUSE1 and hands over The end L of galvanic electricity, No. 3 pins of the full-wave rectification bridge connect the N-terminal of industrial-frequency alternating current by conducting wire, and the 2 of the full-wave rectification bridge Number the 1st branch of pin connects No. 4 pins of full-wave rectification bridge by capacitor C1, and the 2nd branch connects the yin of diode D5 by resistance R1 Pole, the 3rd branch connect the cathode of diode D5 by capacitor C2, and the 4th branch connects No. 1 pin of high frequency transformer T2 primary side, high No. 3 pins of frequency power transformer T2 primary side connect the anode of diode D5, and No. 7 pins of the high frequency transformer T2 secondary side connect two poles The anode of pipe D7, No. 5 the 1st branches of pin of high frequency transformer T2 secondary side connect the cathode of diode D7, the 2nd branch by capacitor C5 No. 4 pins of singlechip chip U3 are connect by zener diode ZD1, the 3rd branch passes through wired earth；

The charging control circuit includes singlechip chip U3, and No. 1 pin of the singlechip chip U3 connects three terminal regulator core The ground terminal of piece U2 and ground connection, No. 4 the 1st branches of pin of the singlechip chip U3 connect the cathode of zener diode DZ1, and the 2nd Branch connects the cathode of diode D7 by resistance R4 and is connected to the input terminal of three terminal regulator chip U2, the singlechip chip U3 No. 6 pins be grounded by switch SW1, No. 7 pins of the singlechip chip U3 are connect by resistance R5, light emitting diode KED1 Ground, No. 10 pins of the singlechip chip U3 connect the base stage of triode Q3 by resistance R8, and the emitter of triode Q3 passes through Light-emitting diode LED 2, resistance R7 ground connection, triode Q3 collector connect the anode of rechargeable battery BATT by fuse FUSE2, The cathode of rechargeable battery BATT is grounded, and No. 11 pins of the singlechip chip U3 connect the base stage of triode Q1 by resistance R6, The emitter of triode Q1 connects the collector of triode Q3, and the collector of triode Q1 connects the cathode of diode D7, the monolithic No. 13 the 1st branches of pin of machine core piece U3 are grounded by resistance R9, and the 2nd branch connects the collector of triode Q3 by resistance R10, No. 16 pins of the singlechip chip U3 connect the output end of three terminal regulator chip U2, three terminal regulator core U2 piece by conducting wire Output end is grounded by capacitor C6, and three terminal regulator core U2 piece input terminal connects the cathode of diode D7 by conducting wire.

2. a kind of emergency light charging circuit with charging protection function according to claim 1, it is characterised in that: described The chip model of power supply control chip U1 is SDH8030, and the chip model of the three terminal regulator chip U2 is 7330, the list The chip model of piece machine core piece U3 is AT89C52.