CN212811317U - Bidirectional charging circuit and electronic cigarette - Google Patents
Bidirectional charging circuit and electronic cigarette Download PDFInfo
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- CN212811317U CN212811317U CN202021514401.6U CN202021514401U CN212811317U CN 212811317 U CN212811317 U CN 212811317U CN 202021514401 U CN202021514401 U CN 202021514401U CN 212811317 U CN212811317 U CN 212811317U
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Abstract
The utility model provides a two-way charging circuit and electron cigarette, this two-way charging circuit includes first charging port, second charging port, first transistor, second transistor, third transistor, fourth transistor and charging management module; the first charging port is connected to one end of the battery, the first end of the first transistor, the third end of the second transistor, the first end of the third transistor and the second end of the fourth transistor; the second charging port is connected to the other end of the battery, the third end of the first transistor, the first end of the second transistor, the second end of the third transistor and the first end of the fourth transistor; the output end of the charging management module is connected to the second end of the first transistor and the second end of the second transistor; the third terminal of the third transistor and the third terminal of the fourth transistor are grounded. The technical scheme of the utility model, aim at realizing that the battery is positive and negative to connect the structure of simplifying two-way charging circuit when all chargeable, reduce circuit cost.
Description
Technical Field
The utility model relates to a technical field that charges, in particular to two-way charging circuit and electron cigarette.
Background
Currently, most portable electronic products such as electronic cigarettes are powered by rechargeable batteries such as lithium batteries. The rechargeable battery usually adopts a direct current charging mode, but the direct current charging mode only realizes one-way charging and cannot realize two-way charging. Therefore, when a user charges the rechargeable battery, safety accidents are easy to happen once the rechargeable battery is reversely connected. If the control circuit composed of the micro control unit is used for realizing bidirectional charging, the bidirectional charging circuit has potential safety hazards due to the fact that the micro control unit possibly has an out-of-control phenomenon; if the purpose of bidirectional charging is realized by adopting a plurality of circuit modules, the problems of complex circuit structure and high cost exist.
SUMMERY OF THE UTILITY MODEL
The utility model provides a two-way charging circuit and electron cigarette aims at realizing that the structure of simplifying two-way charging circuit when the battery is positive and negative to connect equal chargeable, reduces circuit cost.
In order to achieve the above object, the present invention provides a bidirectional charging circuit for charging a battery, the bidirectional charging circuit includes a first charging port, a second charging port, a first transistor, a second transistor, a third transistor, a fourth transistor and a charging management module;
the first charging port is connected to one end of the battery, the first end of the first transistor, the third end of the second transistor, the first end of the third transistor and the second end of the fourth transistor;
the second charging port is connected to the other end of the battery, the third end of the first transistor, the first end of the second transistor, the second end of the third transistor and the first end of the fourth transistor;
the output end of the charging management module is connected to the second end of the first transistor and the second end of the second transistor; and the third end of the third transistor and the third end of the fourth transistor are grounded.
Optionally, the first transistor and the second transistor are P-channel enhancement type field effect transistors; the third transistor and the fourth transistor are N-channel enhancement type field effect transistors.
Optionally, the bidirectional charging circuit further includes a first resistor and a second resistor;
the first charging port is connected to a first end of the first transistor and a first end of the third transistor through the first resistor;
the second charging port is connected to the first end of the second transistor and the first end of the fourth transistor through the second resistor;
the first transistor and the second transistor are PNP triodes; the third transistor and the fourth transistor are NPN triodes.
Optionally, the bidirectional charging circuit further includes a surge suppression circuit;
the surge suppression circuit is connected in parallel with the battery.
Optionally, the surge suppression circuit includes a bidirectional transient diode;
the bi-directional transient diode is connected in parallel with the battery.
Optionally, the surge suppression circuit further includes a first capacitor;
the first capacitor is connected in parallel with the bidirectional transient diode.
Optionally, the bidirectional charging circuit further includes a first light emitting diode and a third resistor connected in series;
the output end of the charging management module is connected to the first input end of the charging management module through the first light emitting diode and the third resistor which are connected in series.
Optionally, the bidirectional charging circuit further includes a second light emitting diode and a fourth resistor connected in series;
the output end of the charging management module is connected to the second input end of the charging management module through the second light-emitting diode and the fourth resistor which are connected in series.
In order to achieve the above object, the present invention provides an electronic cigarette, which includes the bidirectional charging circuit as described above.
The technical scheme of the utility model, first charging port is positive, and when the second end of charging was for the burden, first transistor and fourth transistor were ended, and second transistor and third transistor switch on, and the electric current flowed from the output of the management module that charges to the ground end of the management module that charges is charged to the port flow direction of charging through second transistor, first charging port, battery, third transistor and second in proper order, charges for the battery. When the first charging port is negative and the second charging port is positive, the first transistor and the fourth transistor are turned on, the second transistor and the third transistor are turned off, and the current flows out from the output end of the charging management module, and flows to the ground end of the charging management module 10 through the first transistor, the second charging port, the battery, the fourth transistor and the first charging port in sequence to charge the battery. The utility model discloses utilize components and parts self characteristic among the two-way charging circuit to realize that the battery is positive and negative to connect two-way charging, stability and security that can effectual improvement circuit, and circuit structure is simple, and is with low costs.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a bidirectional charging circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an equivalent circuit of the bidirectional charging circuit of the present invention;
fig. 3 is another schematic diagram of an equivalent circuit of the bidirectional charging circuit of the present invention;
fig. 4 is a schematic circuit diagram of another embodiment of the bidirectional charging circuit of the present invention;
fig. 5 is a schematic circuit diagram of a bidirectional charging circuit according to another embodiment of the present invention;
FIG. 6 is a schematic diagram of an embodiment of the surge suppression circuit of FIG. 5;
fig. 7 is a schematic circuit diagram of a bidirectional charging circuit according to another embodiment of the present invention;
fig. 8 is a block diagram of an embodiment of the electronic cigarette of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 is a schematic circuit diagram of a bidirectional charging circuit according to an embodiment of the present invention.
Referring to fig. 1, the bidirectional charging circuit is used for charging a rechargeable battery such as a lithium battery, etc., wherein the bidirectional charging circuit includes a first charging port P1, a second charging port P2, a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, and a charging management module 10.
The first charging port P1 is connected to one end of the battery 100 to be charged, the first end of the first transistor Q1, the third end of the second transistor Q2, the first end of the third transistor Q3 and the second end of the fourth transistor Q4;
the second charging port P2 is connected to the other end of the battery 100, the third terminal of the first transistor Q1, the first terminal of the second transistor Q2, the second terminal of the third transistor Q3 and the first terminal of the fourth transistor Q4;
the output terminal OUT of the charge management module 10 is connected to the second terminal of the first transistor Q1 and the second terminal of the second transistor Q2; and the third terminal of the third transistor Q3 and the third terminal of the fourth transistor Q4 are grounded.
In this embodiment, the first transistor Q1 and the second transistor Q2 are both low-level conducting transistors, such as a P-channel enhancement mode fet or a PNP transistor. The third transistor Q3 and the fourth transistor Q4 are both transistors that are turned on at a high level, such as N-channel enhancement mode fets or NPN transistors. The charging management module 10 may be selected as a charging management chip.
The working principle of the bidirectional charging circuit is as follows:
1. if the first charging port P1 is positive and the second charging port P2 is negative, the first transistor Q1 and the fourth transistor Q4 are turned off, and the second transistor Q2 and the third transistor Q3 are turned on, so that the circuit can be equivalent to the circuit structure shown in fig. 2. At this time, the current flows OUT from the output terminal OUT of the charge management module 10, and flows to the ground terminal GND of the charge management module 10 through the second transistor Q2, the first charge port P1, the battery 100, the third transistor Q3 and the second charge port P2 in sequence, so as to charge the battery 100.
2. If the first charging port P1 is negative and the second charging port P2 is positive, the first transistor Q1 and the fourth transistor Q4 are turned on, the second transistor Q2 and the third transistor Q3 are turned off, and the circuit can be equivalent to the circuit structure shown in fig. 3. At this time, the current flows OUT from the output terminal OUT of the charge management module 10, and flows to the ground terminal GND of the charge management module 10 through the first transistor Q1, the second charge port P2, the battery 100, the fourth transistor Q4 and the first charge port P1 in sequence, so as to charge the battery 100. In conclusion, the technical scheme of the embodiment realizes the positive and negative connection bidirectional charging of the battery completely through the self characteristics of the components in the circuit, effectively improves the stability and the safety of the circuit, and has simple circuit structure and low cost.
In one embodiment, the first transistor Q1 and the second transistor Q2 are P-channel enhancement mode fets; and the third transistor Q3 and the fourth transistor Q4 are N-channel enhancement mode field effect transistors.
The grid electrodes of the P-channel enhancement mode field effect transistors are used as the first end of the first transistor Q1 and the first end of the second transistor Q2; the source of the P-channel enhancement mode fet is taken as the second terminal of the first transistor Q1 and the second terminal of the second transistor Q2; the drain of the P-channel enhancement mode fet is the third terminal of the first transistor Q1 and the third terminal of the second transistor Q2.
The grid electrodes of the N-channel enhancement type field effect transistors are used as the first end of the third transistor Q3 and the first end of the fourth transistor Q4; the drain electrode of the N-channel enhancement mode field effect transistor is taken as a second end of the third transistor Q3 and a second end of the fourth transistor Q4; the source of the N-channel enhancement mode fet is the third terminal of the third transistor Q3 and the third terminal of the fourth transistor Q4.
The first transistor Q1 and the second transistor Q2 of the present embodiment are P-channel enhancement mode fets; and the third transistor Q3 and the fourth transistor Q4 employ N-channel enhancement mode field effect transistors. Because the enhancement type field effect transistor is adopted, the pressure difference between the input end and the output end of the rectifying circuit is very small and is close to 0, and the efficiency of the whole bidirectional charging circuit is very high. And, have circuit structure simply, advantage with low costs.
In one embodiment, referring to fig. 4, the bidirectional charging circuit further includes a first resistor R1 and a second resistor R2; the first charging port P1 is connected to the first terminal of the first transistor Q1 and the first terminal of the third transistor Q3 through the first resistor R1; the second charging port P2 is connected to the first terminal of the second transistor Q2 and the first terminal of the fourth transistor Q4 via the second resistor R2;
in this embodiment, the first transistor Q1 and the second transistor Q2 are both PNP triodes; and the third transistor Q3 and the fourth transistor Q4 are NPN transistors.
The base electrode of the PNP triode is taken as the first end of the first transistor Q1 and the first end of the second transistor Q2; a collector of the PNP transistor is a second terminal of the first transistor Q1 and a second terminal of the second transistor Q2; the emitter of the PNP transistor is the third terminal of the first transistor Q1 and the third terminal of the second transistor Q2.
The base electrodes of the NPN triodes are taken as the first end of the third transistor Q3 and the first end of the fourth transistor Q4; an emitter of the NPN triode is a second terminal of the third transistor Q3 and a second terminal of the fourth transistor Q4; collectors of NPN triodes are the third terminal of the third transistor Q3 and the third terminal of the fourth transistor Q4.
In this embodiment, the first transistor Q1 and the second transistor Q2 both use PNP triodes, and current is limited by a first resistor R1 to protect the first transistor Q1 and the second transistor Q2; the third transistor Q3 and the fourth transistor Q4 both use NPN transistors and are current limited by a second resistor R2 to protect the third transistor Q3 and the fourth transistor Q4.
In one embodiment, referring to fig. 5, the bidirectional charging circuit further includes a surge suppression circuit 20; and surge suppressing circuit 20 is provided in parallel with battery 100, that is, one end of surge suppressing circuit 20 is connected to first charging port P1, and the other end of surge suppressing circuit 20 is connected to second charging port P2.
The surge suppressing circuit 20 may be implemented by a circuit composed of a single or two unidirectional transient diodes, or may be implemented by a circuit composed of bidirectional transient diodes. The surge suppression circuit 20 is used to prevent surge shock or electrostatic interference from damaging components of the circuit.
In one embodiment, referring to fig. 6, the surge suppression circuit 20 includes a bidirectional transient diode TVS; the bidirectional transient diode TVS is connected to the battery 100 in parallel, that is, one end of the bidirectional transient diode TVS is connected to the first charging port P1, and the other end of the bidirectional transient diode TVS is connected to the second charging port P2.
Specifically, when the circuit receives surge impact or electrostatic interference, the bidirectional transient diode TVS is turned on to filter the surge impact and the electrostatic interference, and the voltages at the two ends of the diode are clamped at the voltage stabilizing value of the diode to protect components in the circuit.
In one embodiment, referring to fig. 6, the surge suppression circuit 20 further includes a first capacitor C1; and the first capacitor C1 is arranged in parallel with the bi-directional transient diode TVS.
The first capacitor C1 is used for preventing surge impact and electrostatic interference, and has a filtering function, so that the stability of the circuit is improved.
In one embodiment, referring to fig. 7, the bidirectional charging circuit further includes a first light emitting diode D1 and a third resistor R3 connected in series;
and the output terminal OUT of the charge management module 10 is connected to the first input terminal CHRG of the charge management module 10 via the first light emitting diode D1 and the third resistor R3 connected in series.
The first light emitting diode D1 may be selected as one of a red light emitting diode, a green light emitting diode, or a blue light emitting diode. The first light emitting diode D1 is used to indicate the state of charge of the battery 100. Specifically, during the charging process, the first light emitting diode D1 lights up to indicate that the battery 100 is being charged; when the battery 100 is fully charged, the first light emitting diode D1 is extinguished.
In one embodiment, referring to fig. 7, the bidirectional charging circuit further includes a second light emitting diode D2 and a fourth resistor R4 connected in series;
and the output terminal OUT of the charge management module 10 is connected to the second input terminal STDBY of the charge management module 10 via the second light emitting diode D2 and the fourth resistor R4 connected in series.
The second light emitting diode D2 can be selected as one of a red light emitting diode, a green light emitting diode or a blue light emitting diode; it is preferable that the first light emitting diode D1 emit light of a different color from the second light emitting diode D2.
The second light emitting diode D2 is used to indicate the state of charge of the battery 100. Specifically, during the charging process of the battery 100, the second light emitting diode D2 is in the off state, and when the battery 100 is fully charged, the second light emitting diode D1 is lit to remind the user that the charging process is completed.
The utility model also provides an electronic cigarette, this electronic cigarette includes as above any one two-way charging circuit, the detailed structure of this two-way charging circuit can refer to above-mentioned embodiment, and the description is omitted here; it can be understood that, because the utility model discloses an above-mentioned two-way charging circuit has been used in the electron cigarette, consequently, the utility model discloses the embodiment of electron cigarette includes all technical scheme of the whole embodiments of above-mentioned two-way charging circuit, and the technical effect who reaches is also identical, no longer gives details here.
In one embodiment, referring to fig. 8, the electronic cigarette further includes a battery 100, a sampling circuit 200, a controller 300, a driving circuit 400, and an atomizer 500; the bi-directional charging circuit is used to charge the battery 100.
The battery 100 is electrically connected to the sampling circuit 200, the controller 300 and the atomizer 500, and supplies power to the sampling circuit 200, the controller 300 and the atomizer 500.
The sampling circuit 200 is further electrically connected to the controller 300 and the atomizer 500, and the sampling circuit 200 is configured to collect a core voltage value of the atomizer 500 and feed the core voltage value back to the controller 300;
the controller 300 is further electrically connected to the driving circuit 400, and the controller 300 is configured to generate a driving signal to the driving circuit 400 according to the voltage value fed back by the sampling circuit 200;
the driving circuit 400 is further electrically connected to the atomizer 500, and the driving circuit 400 is configured to drive the atomizer 500 to operate according to a driving signal of the controller 300.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (9)
1. A bidirectional charging circuit is used for charging a battery and is characterized by comprising a first charging port, a second charging port, a first transistor, a second transistor, a third transistor, a fourth transistor and a charging management module;
the first charging port is connected to one end of the battery, the first end of the first transistor, the third end of the second transistor, the first end of the third transistor and the second end of the fourth transistor;
the second charging port is connected to the other end of the battery, the third end of the first transistor, the first end of the second transistor, the second end of the third transistor and the first end of the fourth transistor;
the output end of the charging management module is connected to the second end of the first transistor and the second end of the second transistor; and the third end of the third transistor and the third end of the fourth transistor are grounded.
2. The bidirectional charging circuit of claim 1, wherein said first transistor and said second transistor are P-channel enhancement mode field effect transistors; the third transistor and the fourth transistor are N-channel enhancement type field effect transistors.
3. The bidirectional charging circuit of claim 1, further comprising a first resistor and a second resistor;
the first charging port is connected to a first end of the first transistor and a first end of the third transistor through the first resistor;
the second charging port is connected to the first end of the second transistor and the first end of the fourth transistor through the second resistor;
the first transistor and the second transistor are PNP triodes; the third transistor and the fourth transistor are NPN triodes.
4. A bidirectional charging circuit as set forth in any of claims 1-3 further comprising a surge suppression circuit;
the surge suppression circuit is connected in parallel with the battery.
5. The bidirectional charging circuit of claim 4, wherein said surge suppression circuit comprises a bidirectional transient diode;
the bi-directional transient diode is connected in parallel with the battery.
6. The bidirectional charging circuit of claim 5, wherein said surge suppression circuit further comprises a first capacitor;
the first capacitor is connected in parallel with the bidirectional transient diode.
7. The bidirectional charging circuit of claim 6 further comprising a first light emitting diode and a third resistor in series;
the output end of the charging management module is connected to the first input end of the charging management module through the first light emitting diode and the third resistor which are connected in series.
8. The bidirectional charging circuit of claim 7, further comprising a second light emitting diode and a fourth resistor connected in series;
the output end of the charging management module is connected to the second input end of the charging management module through the second light-emitting diode and the fourth resistor which are connected in series.
9. An electronic cigarette, characterized in that the electronic cigarette comprises a bidirectional charging circuit according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021514401.6U CN212811317U (en) | 2020-07-27 | 2020-07-27 | Bidirectional charging circuit and electronic cigarette |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021514401.6U CN212811317U (en) | 2020-07-27 | 2020-07-27 | Bidirectional charging circuit and electronic cigarette |
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| Publication Number | Publication Date |
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| CN212811317U true CN212811317U (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021514401.6U Active CN212811317U (en) | 2020-07-27 | 2020-07-27 | Bidirectional charging circuit and electronic cigarette |
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| CN (1) | CN212811317U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115001117A (en) * | 2022-08-02 | 2022-09-02 | 荣耀终端有限公司 | Charging circuit, battery module, battery and electronic equipment |
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2020
- 2020-07-27 CN CN202021514401.6U patent/CN212811317U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115001117A (en) * | 2022-08-02 | 2022-09-02 | 荣耀终端有限公司 | Charging circuit, battery module, battery and electronic equipment |
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