CN210985704U

CN210985704U - Charger charging auxiliary circuit with prevent function of striking sparks

Info

Publication number: CN210985704U
Application number: CN201922345197.3U
Authority: CN
Inventors: 黄少成
Original assignee: Dongguan Fuyuan Electronic Co ltd
Current assignee: Dongguan Fuyuan Electronic Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-07-10
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a charger charging auxiliary circuit with anti-sparking function, which comprises a power output V + end connected with the positive and negative electrodes of a charger output interface, a power output V-end, a load interface, a MOS tube switch unit and a starting circuit unit for controlling the conduction work of the MOS tube switch unit, wherein the load interface is provided with a V + end and a switch control end which are respectively connected with the positive and negative electrodes of a battery load, the V + end is connected with the power output V + end, the switch control end is connected with the MOS tube switch unit, the starting circuit unit comprises a first triode, a second triode for controlling the conduction of the first triode and a first capacitor connected between the e electrode and the b electrode of the first triode, the e electrode of the first triode is connected with the power output V + end, the c electrode of the first triode is connected with the MOS tube switch unit, the b electrode of the second triode is connected with the switch control end, the c pole of the second triode is connected with the b pole of the first triode, and the e pole of the second triode is connected with the V-end of the power output.

Description

Charger charging auxiliary circuit with prevent function of striking sparks

The technical field is as follows:

the utility model relates to a charger technical field refers in particular to a charger auxiliary circuit that charges with prevent function of striking sparks.

Background art:

a charger is a device for charging various electronic products, is widely used, and becomes an essential component of the electronic products.

When the existing charger is connected with a battery terminal, sparks are easy to generate, the charger is not suitable for charging in special occasions such as fuel, and otherwise, safety accidents are easy to happen when the charger is charged forcibly.

In view of the above, the present inventors propose the following.

The utility model has the following contents:

an object of the utility model is to overcome prior art's not enough, provide a charger auxiliary circuit that charges with prevent function of striking sparks.

In order to solve the technical problem, the utility model discloses a following technical scheme: the charger charging auxiliary circuit with the ignition prevention function comprises a power output V + end, a power output V-end, a load interface, an MOS tube switch unit and a starting circuit unit, wherein the power output V + end and the power output V-end are connected with the positive and negative poles of a charger output interface, the load interface and the MOS tube switch unit are connected between the power output V + end and the power output V-end, the starting circuit unit is used for controlling the conduction work of the MOS tube switch unit, the load interface is provided with a V + end and a switch control end which are respectively used for being connected with the positive and negative poles of a battery load, the V + end is connected with the power output V + end, the switch control end is connected with the MOS tube switch unit, the starting circuit unit comprises a first triode, a second triode and a first capacitor, the second triode is used for controlling the conduction of the first triode, the first capacitor is connected between the e pole and the b pole of the first triode and has, the c pole of the first triode is connected with the MOS tube switch unit, the b pole of the second triode is connected with the switch control end, the c pole of the second triode is connected with the b pole of the first triode, and the e pole of the second triode is connected with the power output V-end.

Further, in the above technical solution, a resistor R6 is further connected between the b-pole of the second triode and the switch control end, and a resistor R4 is further connected between the c-pole of the second triode and the b-pole of the first triode.

Furthermore, in the above technical solution, the MOS switch unit includes a first MOS and a second MOS, a G pole of the first MOS is connected to a c pole of the first triode, the G pole of the first MOS is further connected to a resistor R7 and then connected to a G pole of the second MOS, a D pole of the second MOS is connected to the switch control terminal, an S pole of the first MOS is connected to an S pole of the second MOS, and the D pole of the second MOS is connected to the power output V-terminal.

Further, in the above technical solution, the S pole and the G pole of the second MOS transistor are further connected to a second capacitor having a charging delay function; the G pole of the first MOS tube and the V-end of the power output are also connected with a voltage stabilizing diode.

Further, in the above technical solution, two ends of the first capacitor are further connected in parallel with a resistor R3.

Further, in the above technical solution, two ends of the second capacitor are further connected in parallel with a resistor R12.

Further, in the above technical solution, a resistor R11, a resistor R5, and a resistor R2 are further connected between the G-pole of the first MOS transistor and the c-pole of the first transistor.

Further, in the above technical solution, the model of the first triode is MMBT 5401; the model of the second triode is MMBT 5551.

Further, in the above technical solution, the model of the first MOS transistor is NCE 1540K; the model of the second MOS tube is NCE 1540K.

After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect:

1. when the utility model is used, the power output V + end and the power output V-end are respectively connected with the positive electrode and the negative electrode of the charger output interface to be electrified, so that the load interface of the utility model is equivalent to the charger output interface and is used for connecting a load battery; when the charger is connected with a mains supply and is electrified, and then the load interface is connected with the load battery, the starting circuit unit and the load battery form a complete loop, at the moment, the negative electrode of the load battery provides the potential of the b pole in the second triode to conduct and amplify the second triode, and the c pole of the second triode pulls down the potential of the b pole in the first triode to conduct the first triode, so that the loop formed by the starting circuit unit and the load battery can be conducted, at the moment, the c pole of the first triode provides a high level for the MOS tube switch unit to drive the MOS tube switch unit to conduct, so that the power output V + end, the power output V-end, the load battery and the MOS tube switch unit form a passage, thereby realizing the charging of the load battery, and because the first capacitor can be charged and delayed, the potential of the b pole in the first triode is slowly reduced, play the purpose of time delay to can not switch on in the twinkling of an eye that load interface and load battery are connected, but delay earlier, switch on again to this prevents to produce the spark in the twinkling of an eye when being connected with load battery's terminal, in order to have the function of preventing striking sparks, makes the charger use safer, the order the utility model discloses extremely strong market competition has. Additionally, the utility model discloses be applied to a little PCB board, with the charger independent design, additionally add little PCB board on the charger promptly, make the charger have the function of preventing striking sparks to supplementary charger charging work.

2. Because of charger the inside device has a plurality of electrolytic capacitor, the charger is not connected city electric conduction, when load interface connection load battery, establish ties because of resistance R7 and second electric capacity, load battery charges to the second, voltage can slowly rise, the G utmost point of second electric capacity and second MOS pipe promptly, the S utmost point is parallelly connected, lead to the second MOS pipe also to postpone to switch on, MOS pipe switch unit postpones to switch on, during load battery and load interface contact period, load battery can not contact in the twinkling of an eye and charge a plurality of electrolytic capacitor in the charger the inside like this, in order to have the function of preventing striking sparks, it is safer to make the charger use, the order the utility model discloses extremely strong market competition has.

Description of the drawings:

fig. 1 is a circuit diagram of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

As shown in fig. 1, the charging auxiliary circuit of a charger with an anti-sparking function includes: a power output V + end 1 connected with the positive and negative electrodes of the charger output interface, a power output V-end 2, a load interface 3 and a MOS tube switch unit 4 connected between the power output V + end 1 and the power output V-end 2, and a start circuit unit 5 for controlling the conduction of the MOS tube switch unit 4, wherein the load interface 3 has a V + end 31 and a switch control end 32 respectively connected with the positive and negative electrodes of a battery load 6, the V + end 31 is connected with the power output V + end 1, the switch control end 32 is connected with the MOS tube switch unit 4, the start circuit unit 5 comprises a first triode 51, a second triode 52 for controlling the conduction of the first triode 51, and a first capacitor 53 connected between the e electrode and the b electrode of the first triode 51 and having a charging delay function, the e electrode of the first triode 51 is connected with the power output V + end 1, the c pole of the first transistor 51 is connected to the MOS switch unit 4, the b pole of the second transistor 52 is connected to the switch control terminal 32, the c pole of the second transistor 52 is connected to the b pole of the first transistor 51, and the e pole of the second transistor 52 is connected to the power output V-terminal 2. When the utility model is used, the power output V + end 1 and the power output V-end 2 are respectively connected with the positive electrode and the negative electrode of the charger output interface to be electrified, so that the load interface 3 in the utility model is equivalent to the charger output interface and is used for connecting a load battery; when the charger is connected with the mains supply and powered on, and then the load interface 3 is connected with the load battery 6, the starting circuit unit 5 and the load battery form a complete loop, at this time, the negative electrode of the load battery 6 provides the b-pole potential in the second triode 52, so that the second triode 52 is conducted and amplified, and the c-pole of the second triode pulls down the b-pole potential in the first triode 51, so that the first triode 51 is also conducted, and the loop formed by the starting circuit unit 5 and the load battery can be conducted, at this time, the c-pole of the first triode 51 provides a high level for the MOS tube switch unit 4 to drive the MOS tube switch unit 4 to be conducted, so that the power output V + end 1, the power output V-end 2, the load battery 6 and the MOS tube switch unit 4 form a path, thereby realizing the charging of the load battery 6, and because the first capacitor 53 can be charged with time delay, make the slow step-down of b utmost point electric potential in the first triode 51, play the purpose of delay to can not switch on in the twinkling of an eye that load interface 3 and load battery 6 are connected, but delay earlier, switch on again, prevent to produce the spark in the twinkling of an eye when being connected with load battery 6 with this, with having the function of preventing striking sparks, make the charger use safer, the order the utility model discloses extremely strong market competition has. Additionally, the utility model discloses be applied to a little PCB board, with the charger independent design, additionally add little PCB board on the charger promptly, make the charger have the function of preventing striking sparks to supplementary charger charging work.

A resistor R6 is further connected between the b-pole of the second transistor 52 and the switch control terminal 32, and a resistor R4 is further connected between the c-pole of the second transistor 52 and the b-pole of the first transistor 51.

The MOS switch unit 4 includes a first MOS transistor 41 and a second MOS transistor 42, the G pole of the first MOS transistor 41 is connected to the c pole of the first triode 51, the G pole of the first MOS transistor 41 is further connected to a resistor R7 and then connected to the G pole of the second MOS transistor 42, the D pole of the second MOS transistor 42 is connected to the switch control terminal 32, the S pole of the first MOS transistor 41 is connected to the S pole of the second MOS transistor 42, and the D pole of the second MOS transistor 42 is connected to the power output V-terminal 2. When the c-pole of the first transistor 51 outputs a high level, the high level is provided to the G-pole of the first MOS transistor 41 and the G-pole of the second MOS transistor 42, so as to control the first MOS transistor 41 and the second MOS transistor 42 to be simultaneously turned on.

The S pole and the G pole of the second MOS transistor 42 are further connected to a second capacitor 421 having a charging delay function; the G pole of the first MOS tube 41 and the power output V-end 2 are also connected with a voltage stabilizing diode 43. Because of charger the inside device has a plurality of electrolytic capacitor, the charger is not connected city electric conduction, when connecting load battery 6 with load interface 3, establish ties because of resistance R7 and second electric capacity 421, load battery 6 charges to second electric capacity 421, voltage can slowly rise, second electric capacity 421 and second MOS pipe 42' S the G utmost point promptly, the S utmost point is parallelly connected, lead to second MOS pipe 42 also can postpone to switch on, MOS pipe switch unit 4 postpones to switch on, in load battery 6 and load interface 3 contact period like this, load battery 6 can not contact in the twinkling of an eye and charge to a plurality of electrolytic capacitor in the charger, in order to have the function of preventing striking sparks, make the charger use safelyr, the order the utility model discloses extremely strong market competition has.

A resistor R3 is further connected in parallel across the first capacitor 53. A resistor R12 is further connected in parallel across the second capacitor 421. A resistor R11, a resistor R5 and a resistor R2 are further connected between the G electrode of the first MOS transistor 41 and the c electrode of the first triode 51. The model of the first triode 51 is MMBT 5401; the second triode 52 is of the type MMBT 5551. The model of the first MOS transistor 41 is NCE 1540K; the second MOS transistor 42 is of the type NCE 1540K.

To sum up, when the utility model is used, the power output V + end 1 and the power output V-end 2 are respectively connected with the positive electrode and the negative electrode of the charger output interface to be electrified, so that the load interface 3 in the utility model is equivalent to the charger output interface and is used for connecting a load battery; when the charger is connected with the mains supply and powered on, and then the load interface 3 is connected with the load battery 6, the starting circuit unit 5 and the load battery form a complete loop, at this time, the negative electrode of the load battery 6 provides the b-pole potential in the second triode 52, so that the second triode 52 is conducted and amplified, and the c-pole of the second triode pulls down the b-pole potential in the first triode 51, so that the first triode 51 is also conducted, and the loop formed by the starting circuit unit 5 and the load battery can be conducted, at this time, the c-pole of the first triode 51 provides a high level for the MOS tube switch unit 4 to drive the MOS tube switch unit 4 to be conducted, so that the power output V + end 1, the power output V-end 2, the load battery 6 and the MOS tube switch unit 4 form a path, thereby realizing the charging of the load battery 6, and because the first capacitor 53 can be charged with time delay, make the slow step-down of b utmost point electric potential in the first triode 51, play the purpose of delay to can not switch on in the twinkling of an eye that load interface 3 and load battery 6 are connected, but delay earlier, switch on again, prevent to produce the spark in the twinkling of an eye when being connected with load battery 6 with this, with having the function of preventing striking sparks, make the charger use safer, the order the utility model discloses extremely strong market competition has. Additionally, the utility model discloses be applied to a little PCB board, with the charger independent design, additionally add little PCB board on the charger promptly, make the charger have the function of preventing striking sparks to supplementary charger charging work. In addition, because of the charger the inside device has a plurality of electrolytic capacitor, the charger is not connected city electric conduction, when connecting load battery 6 with load interface 3, establish ties because of resistance R7 and second electric capacity 421, load battery 6 charges to second electric capacity 421, voltage can slowly rise, second electric capacity 421 and second MOS pipe 42' S the G utmost point promptly, the S utmost point is parallelly connected, lead to second MOS pipe 42 also can postpone to switch on, MOS pipe switch unit 4 postpones to switch on, in load battery 6 and load interface 3 contact period like this, load battery 6 can not contact in the twinkling of an eye and charge to a plurality of electrolytic capacitor in the charger the inside, in order to have the function of preventing striking sparks, make the charger use safelyr, the order the utility model discloses extremely strong market competition has.

Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a charger auxiliary circuit that charges with prevent function of striking sparks which characterized in that: the charger comprises a power output V + end (1) connected with the positive pole and the negative pole of a charger output interface, a power output V-end (2), a load interface (3) and an MOS (metal oxide semiconductor) tube switch unit (4) which are connected between the power output V + end (1) and the power output V-end (2), and a starting circuit unit (5) for controlling the conduction work of the MOS tube switch unit (4), wherein the load interface (3) is provided with a V + end (31) and a switch control end (32) which are respectively used for being connected with the positive pole and the negative pole of a battery load (6), the V + end (31) is connected with the power output V + end (1), the switch control end (32) is connected with the MOS tube switch unit (4), the starting circuit unit (5) comprises a first triode (51), a second triode (52) for controlling the conduction of the first triode (51), and a first capacitor (53) which is connected between the e pole and the b pole of the first triode (51) and has a charging delay function The e pole of the first triode (51) is connected with the V + end (1) of the power output, the c pole of the first triode (51) is connected with the MOS tube switch unit (4), the b pole of the second triode (52) is connected with the switch control end (32), the c pole of the second triode (52) is connected with the b pole of the first triode (51), and the e pole of the second triode (52) is connected with the V-end (2) of the power output.

2. The charging auxiliary circuit of a charger with an anti-sparking function according to claim 1, characterized in that: a resistor R6 is connected between the b pole of the second triode (52) and the switch control end (32), and a resistor R4 is connected between the c pole of the second triode (52) and the b pole of the first triode (51).

3. The charging auxiliary circuit of a charger with an anti-sparking function according to claim 1, characterized in that: the MOS tube switch unit (4) comprises a first MOS tube (41) and a second MOS tube (42), the G pole of the first MOS tube (41) is connected with the c pole of the first triode (51), the G pole of the first MOS tube (41) is also connected with the G pole of the second MOS tube (42) after being connected with a resistor R7, the D pole of the second MOS tube (42) is connected with the switch control end (32), the S pole of the first MOS tube (41) is connected with the S pole of the second MOS tube (42), and the D pole of the second MOS tube (42) is connected with the power output V-end (2).

4. A charger charging auxiliary circuit with an anti-sparking function according to claim 3, characterized in that: the S pole and the G pole of the second MOS tube (42) are also connected with a second capacitor (421) with a charging time delay function; the G pole of the first MOS tube (41) and the power output V-end (2) are also connected with a voltage stabilizing diode (43).

5. The charging auxiliary circuit of a charger with an anti-sparking function according to claim 4, characterized in that: and a resistor R3 is also connected in parallel at two ends of the first capacitor (53).

6. The charging auxiliary circuit of a charger with an anti-sparking function according to claim 4, characterized in that: and a resistor R12 is also connected in parallel at two ends of the second capacitor (421).

7. The charging auxiliary circuit of a charger with an anti-sparking function according to claim 4, characterized in that: and a resistor R11, a resistor R5 and a resistor R2 are also connected between the G pole of the first MOS transistor (41) and the c pole of the first triode (51).

8. A charger charging auxiliary circuit with an anti-sparking function according to any one of claims 1-6, characterized in that: the model of the first triode (51) is MMBT 5401; the model of the second triode (52) is MMBT 5551.

9. A charger charging auxiliary circuit with an anti-sparking function according to any one of claims 3-6, characterized in that: the model of the first MOS tube (41) is NCE 1540K; the model of the second MOS tube (42) is NCE 1540K.