CN210577920U

CN210577920U - Charging circuit and portable power source

Info

Publication number: CN210577920U
Application number: CN201921742295.4U
Authority: CN
Inventors: 叶镇隆
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-05-19
Anticipated expiration: 2029-10-16

Abstract

The utility model discloses a charging circuit, it includes rechargeable battery, a controller, super capacitor, electronic switch and the chip that steps up, rechargeable battery forms the output port behind the chip that steps up, a charging device for waiting charges, one end after super capacitor and the electronic switch series connection is connected to rechargeable battery and steps up between the chip, other end ground connection after the series connection, the controller has first sense terminal and control end, first sense terminal is connected between rechargeable battery and the chip that steps up, an electric quantity information for detecting rechargeable battery, the control end is connected to electronic switch's enable end, a time for when electric quantity information is less than the threshold value, control electronic switch switches on. The utility model also discloses a portable power source including above-mentioned charging circuit. The utility model discloses a rechargeable battery and super capacitor's cooperation for rechargeable battery's energy is fully developed.

Description

Charging circuit and portable power source

Technical Field

The utility model relates to a technical field that charges, concretely relates to charging circuit and portable power source.

Background

The existing mobile power supply is internally provided with a lithium battery, and is mainly used for charging equipment to be charged (such as a mobile phone, a tablet personal computer, an intelligent watch and the like), and the output voltage (generally 3.7V) of the mobile power supply needs to be increased to 9V or even above in a boosting mode at many times, so that the purpose of quick charging is achieved. In this way, the capacity marked by the portable power source is difficult to achieve, and the reason for this is, on the one hand, various consumptions during the charging process, and more importantly, that when the electric quantity of the portable power source is less than a certain level, the voltage thereof is also reduced, and after the electric quantity is reduced to a certain value, even if the capacity of the boost chip is stronger, the boost conversion is not enough, so that the portable power source cannot continue to output, and the energy of the rechargeable battery cannot be fully developed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the objects of the present invention is to provide a charging circuit, which is matched with a rechargeable battery and a super capacitor, so that the energy of the rechargeable battery is fully developed.

The second objective of the present invention is to provide a portable power source including the above charging circuit.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

the utility model provides a charging circuit, its includes rechargeable battery, controller, super capacitor, electronic switch and the chip that steps up, wherein, rechargeable battery forms the output port behind the chip that steps up for waiting to charge equipment charges, the one end after super capacitor and electronic switch establish ties is connected to rechargeable battery and steps up between the chip, and the other end ground connection after establishing ties, the controller has first sense terminal and control end, first sense terminal is connected between rechargeable battery and the chip that steps up for detecting rechargeable battery's electric quantity information, the control end is connected to electronic switch's enable end, is used for when electric quantity information is less than the threshold value, control electronic switch switches on.

Further, the electronic switch is an NPN triode, a base of the NPN triode is connected to the control end, a collector of the NPN triode is grounded through the super capacitor, and an emitter of the NPN triode is connected between the rechargeable battery and the boost chip.

Further, the rechargeable battery is charged through an external direct current source, and the direct current source also charges the super capacitor.

Further, a first filter circuit is arranged between the direct current source and the rechargeable battery, the first filter circuit comprises a capacitor C1 and a capacitor C2, one ends of the capacitor C1 and one end of the capacitor C2 are both connected between the direct current source and the rechargeable battery, and the other ends of the capacitor C1 and the other ends of the capacitor C2 are grounded.

Further, the controller also has a second detection terminal, the second detection terminal is connected between the direct current source and the rechargeable battery through a voltage division circuit, the voltage division circuit includes a resistor R2 and a resistor R3, the resistor R2 is connected between the direct current source and the second detection terminal, one end of the resistor R3 is grounded, and the other end of the resistor R3 is connected between the resistor R2 and the second detection terminal.

Further, the controller is a chip HR8P506 FHNK.

Further, a filter capacitor C3 is arranged between the rechargeable battery and the boost chip, one end of the filter capacitor C3 is connected between the rechargeable battery and the boost chip, and the other end of the filter capacitor C3 is grounded.

Further, the boost chip is a chip MC 34063.

Further, a filter capacitor C5 is further arranged between the boost chip and the output port, one end of the filter capacitor C5 is connected between the boost chip and the output port, and the other end of the filter capacitor C5 is grounded.

The second purpose of the utility model is realized by adopting the following technical scheme:

a portable power source, it includes one of the purposes of the utility model charging circuit.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a rechargeable battery and super capacitor's cooperation, when rechargeable battery's voltage is less than the threshold value (this threshold value is set for according to the boost capability of the chip that steps up, generally when rechargeable battery is less than this threshold value, then the unable normal output of chip that steps up), start super capacitor and cooperate with rechargeable battery, the two is chip output voltage that steps up jointly to the realization is to the abundant development of rechargeable battery energy, in the emergent scene of specially adapted.

Drawings

Fig. 1 is a circuit schematic diagram of a charging circuit of embodiment 1;

fig. 2 is a schematic block diagram of a direct current source of embodiment 1;

fig. 3 is a schematic block diagram of the booster chip of embodiment 1.

In the figure: 10. a direct current source; 11. commercial power; 12. a first rectifying and filtering circuit; 13. a voltage transformation circuit; 14. A second rectifying and filtering circuit; 15. a voltage stabilizing circuit; 20. a rechargeable battery; 30. a controller; 40. a boost chip; 50. and (6) an output port.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available.

Example 1:

referring to fig. 1, a charging circuit mainly includes a rechargeable battery 20, a controller 30, a super capacitor C4, an electronic switch, and a boost chip 40. The output port 50 is formed by the rechargeable battery via the boost chip, and the output port may be, for example, a USB interface, and the external device to be charged is connected to the USB interface through a USB data line, so that charging can be achieved. The external device to be charged can be a smart device such as a mobile phone, a tablet computer, a smart watch, and the like, and can also be other devices such as a flashlight, a desk lamp, a shaver, and the like. The one end after super capacitor C4 and electronic switch establish ties is connected to between rechargeable battery and the chip that steps up, and the other end ground connection after establishing ties, controller have first sense terminal and control end, and first sense terminal is connected between rechargeable battery and the chip that steps up for detect rechargeable battery's electric quantity information, and the control end is connected to electronic switch's enable end, is used for when electric quantity information is less than the threshold value, controls electronic switch and switches on.

When the electric quantity information (mainly voltage information) of the rechargeable battery is lower than the threshold value, the boosting chip cannot normally output, so that even if part of energy of the rechargeable battery is still output, the rechargeable battery cannot be charged for equipment to be charged, the energy of the rechargeable battery cannot be fully utilized, and the full utilization of the energy of the rechargeable battery is particularly important in some emergency situations.

In the preferred embodiment of the present invention, in this case, the controller controls the electronic switch to be turned on, so as to implement that the super capacitor C4 and the rechargeable battery jointly provide voltage for the boost chip, and the boost chip can still continue outputting, and certainly, this case cannot ensure that the energy of the rechargeable battery is fully utilized.

Electronic switch can be in triode, MOS pipe, silicon controlled rectifier, relay etc. the utility model discloses in the embodiment of preferred, electronic switch adopts NPN triode Q1 (of course, also can be the PNP triode), and NPN triode Q1's base is connected to the control end, and NPN triode Q1's collecting electrode passes through super capacitor C4 ground connection, and NPN triode Q1's projecting pole is connected to rechargeable battery and steps up between the chip. When the charge information is lower than the threshold value, the control terminal outputs a high level to turn on the electronic switch, and of course, in this case, the output voltage of the super capacitor C4 is required to be greater than the output voltage of the rechargeable battery (at least 0.7V greater than the output voltage of the rechargeable battery).

The charging of the rechargeable battery and the super capacitor C4 can be completed by an external direct current source, and the output end of the direct current source is connected between the rechargeable battery and the super capacitor C4 circuit (the super capacitor C4 and the electronic switch are connected in series). The controller also has a second detection terminal, the second detection terminal is connected between the direct current source and the rechargeable battery through a voltage division circuit, the voltage division circuit comprises a resistor R2 and a resistor R3, the resistor R2 is connected between the direct current source and the second detection terminal, one end of the resistor R3 is grounded, and the other end of the resistor R3 is connected between the resistor R2 and the second detection terminal. When the controller detects that the controller is connected with an external direct current source, namely when the second detection end inputs a high level signal, the control end outputs a high level, so that the electronic switch is switched on, and the direct current source charges the rechargeable battery and the super capacitor C4.

In addition, in order to guarantee the output stability of direct current source, guarantee rechargeable battery and super capacitor C4's life, in the utility model discloses the embodiment of preferred is provided with first filter circuit at the output of direct current source, and first filter circuit includes electric capacity C1 and electric capacity C2, and electric capacity C1 and electric capacity C2's one end all are connected to between direct current source and the rechargeable battery, and electric capacity C1 and electric capacity C2's the other end ground connection.

The DC source may adopt an existing AC-DC circuit, for example, a circuit manner shown in fig. 2 may be adopted, and the AC-DC source includes a first rectifying and filtering circuit 12, a transforming circuit 13, a second rectifying and filtering circuit 14, and a voltage stabilizing circuit 15, an input end of the first rectifying and filtering circuit is connected to the commercial power 11, an output end of the first rectifying and filtering circuit outputs a DC voltage through the transforming circuit, the second rectifying and filtering circuit, and the voltage stabilizing circuit in sequence, and of course, in some cases, the DC source may further include a feedback circuit, a PFC circuit, and the like.

In the preferred embodiment of the present invention, the controller is implemented by a single chip, for example, by using chip HR8P506FHNK, and of course, chips of other models can be used.

In the preferred embodiment of the present invention, a filter capacitor C3 is further disposed between the rechargeable battery and the boost chip, one end of the filter capacitor C3 is connected between the rechargeable battery and the boost chip, and the other end of the filter capacitor C3 is grounded. Similarly, the filter capacitor C3 is used to ensure the stability of the output value boost chip voltage.

In the preferred embodiment of the present invention, the boost chip can be implemented by the chip MC 34063. Referring to fig. 3, a structure of a chip MC34063 and a peripheral circuit thereof is shown, where the peripheral circuit mainly includes a resistor R4, a resistor R5, a resistor R6, a capacitor C6, a capacitor C7 and an inductor L1, two ends of the resistor R4 are respectively connected to a sixth pin and a seventh pin of the chip MC34063, the sixth pin of the chip MC34063 is further connected between an emitter of an NPN transistor Q1 and a rechargeable battery, one end of the capacitor C6 is grounded, the other end is connected to the sixth pin of the chip MC34063, the second pin, the fourth pin and the fifth pin of the chip MC34063 are grounded, the third pin of the chip MC34063 is grounded through the capacitor C7, the eighth pin of the chip MC34063 is connected to the seventh pin of the chip MC34063 through a resistor R45, one end of the inductor L1 is connected to the resistor R4, the seventh pin of the chip MC34063, the resistor R5 is connected between the other end of the inductor L1 and the first pin of the chip MC34063, the other end of the resistor R6 is grounded; the output port is connected to a first pin of the chip MC 34063.

Similarly, a filter capacitor C5 is further disposed between the boost chip and the output port, one end of the filter capacitor C5 is connected between the boost chip and the output port (specifically, between the first pin of the resistors R6 and MC34063 and the output port), the other end of the filter capacitor C5 is grounded, and the filter capacitor C5 is used for ensuring the output stability of the boost chip.

Example 2:

embodiment 2 discloses a portable power source, which includes necessary components, such as a PCB board on which components of the charging circuit are mounted and a housing on which the PCB board, an output interface, an indicator light, a display screen, and the like are mounted, in addition to the charging circuit in embodiment 1, and of course, other components, such as a heat sink, and the like, may be included as needed.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a charging circuit, its characterized in that, it includes rechargeable battery, controller, super capacitor, electronic switch and the chip that steps up, wherein, rechargeable battery forms output port behind the chip that steps up for treating charging device charges, super capacitor is connected to rechargeable battery and steps up between the chip with the one end after the electronic switch establishes ties, and the other end ground connection after the establishing ties, the controller has first sense terminal and control end, first sense terminal is connected between rechargeable battery and the chip that steps up for detecting rechargeable battery's electric quantity information, the control end is connected to electronic switch's the enable end, is used for when electric quantity information is less than the threshold value, control electronic switch switches on.

2. The charging circuit according to claim 1, wherein the electronic switch is an NPN transistor, a base of the NPN transistor is connected to the control terminal, a collector of the NPN transistor is grounded through the super capacitor, and an emitter of the NPN transistor is connected between the rechargeable battery and the boost chip.

3. The charging circuit of claim 1, wherein the rechargeable battery is charged by an external dc source that also charges the supercapacitor.

4. The charging circuit of claim 3, wherein a first filter circuit is disposed between the DC source and the rechargeable battery, the first filter circuit comprises a capacitor C1 and a capacitor C2, one end of each of the capacitor C1 and the capacitor C2 is connected between the DC source and the rechargeable battery, and the other end of each of the capacitor C1 and the capacitor C2 is grounded.

5. The charging circuit of claim 3, wherein the controller further has a second sensing terminal connected between the DC source and the rechargeable battery through a voltage divider circuit, the voltage divider circuit includes a resistor R2 and a resistor R3, the resistor R2 is connected between the DC source and the second sensing terminal, one terminal of the resistor R3 is connected to ground, and the other terminal is connected between the resistor R2 and the second sensing terminal.

6. The charging circuit of any of claims 1-5, wherein the controller is a chip HR8P506 FHNK.

7. The charging circuit according to any one of claims 1 to 5, wherein a filter capacitor C3 is further disposed between the rechargeable battery and the boost chip, one end of the filter capacitor C3 is connected between the rechargeable battery and the boost chip, and the other end of the filter capacitor C3 is grounded.

8. The charging circuit of any of claims 1-5, wherein the boost chip is a chip MC 34063.

9. The charging circuit according to any one of claims 1 to 5, wherein a filter capacitor C5 is further disposed between the boost chip and the output port, one end of the filter capacitor C5 is connected between the boost chip and the output port, and the other end of the filter capacitor C5 is grounded.

10. A mobile power supply, characterized in that it comprises a charging circuit according to any one of claims 1 to 9.