CN104167784A - Portable power source circuit - Google Patents

Portable power source circuit Download PDF

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Publication number
CN104167784A
CN104167784A CN201410384627.1A CN201410384627A CN104167784A CN 104167784 A CN104167784 A CN 104167784A CN 201410384627 A CN201410384627 A CN 201410384627A CN 104167784 A CN104167784 A CN 104167784A
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CN
China
Prior art keywords
circuit
connects
chip microcomputer
output
power source
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Pending
Application number
CN201410384627.1A
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Chinese (zh)
Inventor
程世坤
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SHENZHEN CHAOCHUANGXIN SCIENCE TECHNOLOGY Co Ltd
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SHENZHEN CHAOCHUANGXIN SCIENCE TECHNOLOGY Co Ltd
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Application filed by SHENZHEN CHAOCHUANGXIN SCIENCE TECHNOLOGY Co Ltd filed Critical SHENZHEN CHAOCHUANGXIN SCIENCE TECHNOLOGY Co Ltd
Priority to CN201410384627.1A priority Critical patent/CN104167784A/en
Publication of CN104167784A publication Critical patent/CN104167784A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a portable power source circuit and belongs to the technical field of electronic circuits. The portable power source circuit comprises a single-chip microcomputer, a DC/DC boost conversion module, a filtering and energy storage module, an output control module, a battery interface module, a sampling module and a display circuit. The DC/DC boost conversion module comprises an inductor L1, an NMOS circuit and a PMOS circuit, wherein one end of the inductor L1 is connected with the battery interface module, the other end of the inductor L1 is connected with a drain of an NMOS and a drain of a PMOS, and a source of the PMOS is sequentially connected with the filtering and energy storage module and the output control module. One DH-PWM signal output end and one CH-PWM signal output end are arranged for the output of the single-chip microcomputer, the DH-PWM signal output end is connected with a gate of the NMOS, and the CH-PWM signal output end is connected with a gate of the PMOS. Through the technical scheme, a DC/DC conversion circuit can be controlled through the single-chip microcomputer, the output end and the input end can be shared, and the portable power source circuit has the advantages of being high in conversion efficiency and reliability, low in cost and the like.

Description

Portable power source circuit
Technical field
The present invention relates to electronic circuit technology field, especially relate to the control circuit technical field of portable power source.
Background technology
Portable power source is a kind of portable charged equipment that integrates power supply and charge function, can charge whenever and wherever possible or standby power supply to digital equipments such as mobile phones.Portable power source circuit generally includes battery and a series of control circuit.
At present, above market, most of portable power source is all comprised of a micro USB input interface and a USB2.0 output interface or a micro USB input interface and a plurality of USB2.0 output interface.And main control chip single-chip microcomputer has only been realized the electric weight in common function and has been detected, defencive function, communication function, Presentation Function.Charge Management and DC/DC change-over circuit are all completed by independent chip design.So do not bring into play the abundant functional resources of single-chip microcomputer completely, and a plurality of interface increases by cost, circuit conversion Efficiency Decreasing, the failure rate of circuit increases.
Summary of the invention
The present invention, in order to overcome the deficiencies in the prior art, provides a kind of portable power source circuit, its objective is that the existing portable power source circuit function of solution is single, circuit transformation efficiency is low, the problem that poor reliability and cost are high.
In order to solve above-mentioned technical problem, basic technical scheme proposed by the invention is: a kind of portable power source circuit, comprises single-chip microcomputer, DC/DC boost conversion module, filtering and energy-storage module, output control module, battery interface module and sampling module and display circuit;
Described DC/DC boost conversion module comprises inductance L 1, NMOS and PMOS, one end of described inductance L 1 connects battery interface module, the other end connects respectively the drain electrode of described NMOS and the drain electrode of described PMOS, and the source electrode of described PMOS connects described filtering and energy-storage module and output control module successively;
Described sampling module comprises current sampling circuit and battery voltage sampling circuit, and the input of described current sampling circuit connects described output control module, and its output connects single-chip microcomputer, and the output of described battery voltage sampling circuit connects described single-chip microcomputer;
Described single-chip microcomputer is exported DH-PWM signal output part He Yi road, a road CH-PWM signal output part, and described DH-PWM signal output part connects the grid of described NMOS, and described CH-PWM signal output part connects the grid of described PMOS.
In portable power source circuit of the present invention, described NMOS comprises NMOS pipe, and described NMOS pipe connects the DH-PWM signal output part of described single-chip microcomputer by a resistance.
In portable power source circuit of the present invention, described PMOS comprises PMOS pipe, and described pmos pass is crossed the CH-PWM signal output part that a resistance connects described single-chip microcomputer.
In portable power source circuit of the present invention, described output control module comprises output, input and output control circuit, described output control circuit comprises a NMOS pipe and two resistance, the drain electrode of described NMOS pipe is connected with described output, the grid of described NMOS pipe is electrically connected to single-chip microcomputer by one of them resistance, and the source electrode of described NMOS is electrically connected to circuit negative terminal.
In portable power source circuit of the present invention, described output and described input are also unified into an interface.
In portable power source circuit of the present invention, described filtering and energy-storage module comprise filter circuit and the accumulator being electrically connected to successively, and described filter circuit connects the source electrode of described PMOS, and described accumulator connects described output control module; Wherein, described filter circuit is comprised of three electric capacity in parallel, and described accumulator consists of a storage capacitor.
In portable power source circuit of the present invention, described single-chip microcomputer also connects described display circuit by three, I/O mouth, and described display circuit includes six LED lamps and two resistance.
In portable power source circuit of the present invention, an I/O mouth of described single-chip microcomputer connects an extraneous control connection end.
In portable power source circuit of the present invention, an I/O mouth of described single-chip microcomputer is connected with lighting circuit, and described lighting circuit is a LED lamp.
The invention has the beneficial effects as follows:
The present invention adopts a single-chip microcomputer to carry out the output input of control circuit, by DC/DC boost conversion module, Circuit display circuit and connect extraneous control connection end, realized the multifunction of portable power source circuit, only need a single-chip microcomputer just can realize the control to whole circuit, avoided by a plurality of control chips, coming the drawback of control circuit in the past; In addition, DC/DC boost conversion module used in the present invention can improve the conversion efficiency of portable power source circuit; Finally, the present invention is integrated into an interface by output and input parallel connection, has reduced the quantity of interface, reduces costs also easy to use.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of portable power source circuit of the present invention;
Fig. 2 is the physical circuit figure of the portable power source circuit that indicates symbol described in Fig. 1;
Fig. 3 is the physical circuit figure of the portable power source circuit described in Fig. 1.
Embodiment
Below with reference to accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, the present invention is described further, but should not limit the scope of the invention with this.
Contrast Fig. 1 to Fig. 3:
Portable power source circuit of the present invention comprises single-chip microcomputer 10, DC/DC boost conversion module 20, filtering and energy-storage module 30, output control module 40, battery interface module 50, sampling module 60 and display circuit 70, lighting circuit 80 and extraneous control connection end 90.
Wherein, described single-chip microcomputer comprises interface 1,2,3,4,5,6,7,8,9,10,11,12,13 and 14; Wherein, described 5 and 6 export separately CH-PWM signal output part and DH-PWM signal output part.
Described DC/DC boost conversion module 20 comprises inductance L 1, nmos circuit and PMOS circuit, the left end of described inductance L 1 connects battery interface module 50, right-hand member connects respectively the drain electrode of described NMOS and the drain electrode of described PMOS, and the source electrode of described PMOS connects described filtering and energy-storage module 30 and output control module 40 successively.Wherein, NMOS comprises NMOS pipe Q2, described NMOS pipe Q2 connects the DH-PWM signal output part 6 of described single-chip microcomputer 10 by a resistance R 12, the connection electric wire between resistance R 2 and NMOS pipe Q2 also leads to resistance R 11, the negative terminal of other one end connecting circuit of this resistance R 11.Described PMOS comprises PMOS pipe Q3, and described PMOS pipe Q3 connects the CH-PWM signal output part 5 of described single-chip microcomputer 10 by a resistance R 13, and in addition, described PMOS pipe Q3 is also parallel with resistance R 14.
Described filtering and energy-storage module 30 comprise filter circuit 301 and the accumulator 302 being electrically connected to from left to right successively, and described filter circuit 301 connects the source electrode of described PMOS, and described accumulator 302 connects described output control module 40; Wherein, described filter circuit 301 is comprised of three capacitor C in parallel 7, C8 and C9, and described accumulator consists of a storage capacitor C5.
Described output control module 40 comprises output J1, input J2 and output control circuit 401, and described output J1 and input J2 are also unified into an interface 402; Described output control circuit 401 comprises a NMOS pipe Q4 and resistance R 15 and R16, and this resistance R 16 is in parallel with NMOS pipe Q4; The drain electrode of described NMOS pipe Q4 is connected with interface 402, and the grid of described NMOS pipe Q4 is electrically connected to single-chip microcomputer 10 by resistance R 15, and the source electrode of described NMOS pipe Q4 is electrically connected to circuit negative terminal.
Described sampling module 60 comprises current sampling circuit 601 and battery voltage sampling circuit 602, and described current sampling circuit 601 not only can gather output signal but also can Gather and input signal.Wherein, the input of described current sampling circuit 601 comprises resistance R 17, resistance R 18 and resistance R 1 and capacitor C 2, as shown, resistance R 17 connects described output control module 40, its output connects the interface 13 of single-chip microcomputer 10, and described battery voltage sampling circuit 602 comprises resistance R 6 and resistance R 7, and wherein the left end of R7 connects the interface 10 of single-chip microcomputer 10, at the left end of R7, draw described resistance R 6, this resistance R 6 connects the interface 12 of single-chip microcomputer 10.
Described display circuit 70 comprises resistance R 8, resistance R 9 and six LED lamp D1, D2, D3, D4, D5 and D6, described single-chip microcomputer 10 connects respectively described LED lamp D1, D2, D3, D4, D5 and D6 by resistance R 8, resistance R 9, and concrete annexation as shown in the figure.
Described extraneous control connection end 90 comprises a button S1 and resistance R 10, and the two ends of described resistance R 10 connect respectively the interface 1 and 4 of single-chip microcomputer 10, and the left end of resistance R 10 connects button S1.
In figure, lighting circuit connects an I/O interface of single-chip microcomputer 10, i.e. the interface 8 of single-chip microcomputer 10 in figure, and this lighting circuit is a LED lamp D7.
During specific works, the BAT+ in figure and BAT-access lithium ion battery, need the load electronic equipment of charging from interface 402 places in circuit.
When there is the input of 5V power supply outside, to be linked into interface 402, single-chip microcomputer 10 will receive after the signal that battery voltage sampling circuit 602 sends, and single-chip microcomputer 10 is converted to mode of operation by standby mode and judges that thus external input voltage is whether in the voltage range arranging; If fruit outer power voltage is not in arranging voltage range time, single-chip microcomputer 10 disconnects with control input end the control end that sends a signal to output control circuit 401 and being connected of external power source, and stops output pwm signal simultaneously.If outer power voltage is in the scope arranging, single-chip microcomputer 10 is controlled external power source by transmitting control signal to the control end of output control circuit 401 and is passed through, single-chip microcomputer 10, by the detection to battery voltage sampling circuit 602, judges whether that output pwm signal carries out trickle charge pattern, constant current charging mode or constant voltage charge pattern to control PMOS simultaneously.When cell voltage≤3.0V, be trickle charge pattern, charging current is that 2/10ths of charging current is set; Cell voltage during higher than 3.0V and lower than 4.2V, is constant current charging mode, and charging current is for arranging charging current; Cell voltage, when 4.2V, is just in time constant voltage charge pattern, and now the charged electrical linearity that fails to be convened for lack of a quorum reduces, until charging current is that ten of charging current/bis-o'clock are set, charging process finishes.In judgement charge mode, single-chip microcomputer 10 can detect the signal from current sampling circuit 601 simultaneously, and whether judgement output has load to connect.Its judgement according to being: the tube voltage drop that the internal resistance of NMOS Q4 of output control circuit 401 own produces, through current sampling circuit 601, sampling is delivered to single-chip microcomputer 10 and is processed.When the tube voltage drop of Nmos Q4 exceeds settings, show that output has had load to connect, now single-chip microcomputer 10 discharges and recharges automatic control mode by startup, the PWM port of charge closing, by external power source VCC by direct powering load; And when portable power source external load equipment is full of, single-chip microcomputer 10 detects this situation by current sampling circuit 601, thereby the PWM port that restarts charging is to portable power source inside lithium cell charging, until be full of.This automated intelligent of single-chip microcomputer 10 is controlled, and has very effectively improved the useful life of portable power source lithium ion battery and the reliability of portable power source.
During work, DC/DC boost conversion module 20 is exported lithium ion battery battery voltage rise after 5V, and the two-way pwm signal of single-chip microcomputer 10 outputs is driving N metal-oxide-semiconductor Q2 and PMOS pipe Q3 respectively, when switch Nmos pipe Q2 conducting, and during PMOS pipe Q3 cut-off, inductance L 1 energy storage of flowing through of lithium ion battery output voltage; When switch NMOS pipe Q2 cut-off, and during PMOS pipe Q3 conducting, the energy storing in inductance L 1 is managed Q3 by PMOS and is supplied with output, now that voltage in inductance L 1 and the series connection of lithium ion battery voltage manages Q3 supply output by PMOS, so be added to voltage on output higher than lithium ion battery voltage, therefore reach the object of DC/DC boost conversion module 20 boost conversion.The electric current that in the course of work, battery flows out is continuous, but the PMOS pipe Q3 that flows through is pulse, so there has been the existence of filter circuit 301, also accumulator 302 is charged simultaneously.When PMOS pipe Q3 cut-off, the voltage of output just starts to decline, and now accumulator 302 discharges to output again, so load still has stable and continuous electric current.Again because now single-chip microcomputer 10 supply voltages are to be provided by output, so Error processing will be carried out to 1/4 supply voltage in single-chip microcomputer 10 inside, and with the reference voltage of single-chip microcomputer 10 inside carry out error ratio after, control the pulse duration of two-way pwm signal output, on output, obtained again thus the stable 5V voltage that we need.
Single-chip microcomputer 10 is when completing said process; its inner protected location judges the feedback signal of the supply voltage circuit by current sampling circuit 601 and single-chip microcomputer 10 inside constantly the generation of various mistakes, such as output overcurrent, output overvoltage, input overvoltage, input undervoltage, lithium ion battery were exported the situation such as put, overcharge.Protected location becomes control signal to send to the control end of output control circuit 401 results conversion of judgement and protection action has been brought in the control of PWM output.Thereby guaranteed the safety of portable power source.
In addition, single-chip microcomputer 10 completes the control to 6 LED lamp D1, D2, D3, D4, D5 and D6 by 3 I/O mouths 2,3 and 7.How much the feedback signal of battery voltage sampling circuit 602 can allow single-chip microcomputer 10 judge at this moment the existing electric weight of lithium ion battery to also have, and show by LED lamp D1, D2, D3, D4, D5 and D6.
Moreover, 10 pairs of outside Control on Communication of single-chip microcomputer are completed by extraneous control connection end 90, by button S1, resistance R 10 and I/O mouth 1 and 4, completed, touch button S1 and can complete the startup of lighting circuit 80, LED lamp D1, D2, D3, D4, D5 and D6 and DC/DC boost conversion module 20 and the control such as close.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change and revise above-mentioned execution mode.Therefore, the present invention is not limited to embodiment disclosed and described above, to modifications and changes more of the present invention, also should fall in the protection range of claim of the present invention.In addition,, although used some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.

Claims (9)

1. a portable power source circuit, is characterized in that: comprise single-chip microcomputer, DC/DC boost conversion module, filtering and energy-storage module, output control module, battery interface module and sampling module and display circuit;
Described DC/DC boost conversion module comprises inductance L 1, NMOS and PMOS, one end of described inductance L 1 connects battery interface module, the other end connects respectively the drain electrode of described NMOS and the drain electrode of described PMOS, and the source electrode of described PMOS connects described filtering and energy-storage module and output control module successively;
Described sampling module comprises current sampling circuit and battery voltage sampling circuit, and the input of described current sampling circuit connects described output control module, and its output connects single-chip microcomputer, and the output of described battery voltage sampling circuit connects described single-chip microcomputer;
Described single-chip microcomputer is exported DH-PWM signal output part He Yi road, a road CH-PWM signal output part, and described DH-PWM signal output part connects the grid of described NMOS, and described CH-PWM signal output part connects the grid of described PMOS.
2. portable power source circuit as claimed in claim 1, is characterized in that: described NMOS comprises NMOS pipe, and described NMOS pipe connects the DH-PWM signal output part of described single-chip microcomputer by a resistance.
3. portable power source circuit as claimed in claim 1, is characterized in that: described PMOS comprises PMOS pipe, and described pmos pass is crossed the CH-PWM signal output part that a resistance connects described single-chip microcomputer.
4. portable power source circuit as claimed in claim 1, it is characterized in that: described output control module comprises output, input and output control circuit, described output control circuit comprises a NMOS pipe and two resistance, the drain electrode of described NMOS pipe is connected with described output, the grid of described NMOS pipe is electrically connected to single-chip microcomputer by one of them resistance, and the source electrode of described NMOS is electrically connected to circuit negative terminal.
5. portable power source circuit as claimed in claim 4, is characterized in that: described output and described input are also unified into an interface.
6. portable power source circuit as claimed in claim 1, it is characterized in that: described filtering and energy-storage module comprise filter circuit and the accumulator being electrically connected to successively, described filter circuit connects the source electrode of described PMOS, and described accumulator connects described output control module; Wherein, described filter circuit is comprised of three electric capacity in parallel, and described accumulator consists of a storage capacitor.
7. portable power source circuit as claimed in claim 1, is characterized in that: described single-chip microcomputer also connects described display circuit by three, I/O mouth, and described display circuit includes six LED lamps and two resistance.
8. portable power source circuit as claimed in claim 1, is characterized in that: an I/O mouth of described single-chip microcomputer connects an extraneous control connection end.
9. portable power source circuit as claimed in claim 1, is characterized in that: an I/O mouth of described single-chip microcomputer is connected with lighting circuit, and described lighting circuit is a LED lamp.
CN201410384627.1A 2014-08-07 2014-08-07 Portable power source circuit Pending CN104167784A (en)

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Application Number Priority Date Filing Date Title
CN201410384627.1A CN104167784A (en) 2014-08-07 2014-08-07 Portable power source circuit

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Application Number Priority Date Filing Date Title
CN201410384627.1A CN104167784A (en) 2014-08-07 2014-08-07 Portable power source circuit

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104678216A (en) * 2015-02-04 2015-06-03 深圳普瑞赛思检测技术有限公司 Method and device for testing energy or power conversion efficiency of circuit board of mobile power supply
CN105576770A (en) * 2016-02-26 2016-05-11 厦门大学嘉庚学院 Digital lithium battery charging and discharging device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080029153A1 (en) * 2006-08-04 2008-02-07 Erez Margalit Portable power supply
CN204103536U (en) * 2014-08-07 2015-01-14 深圳市超创鑫科技有限公司 Portable power source circuit
CN104283245A (en) * 2013-07-03 2015-01-14 深圳市超创鑫科技有限公司 High-conversion-efficiency mobile power source circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080029153A1 (en) * 2006-08-04 2008-02-07 Erez Margalit Portable power supply
CN104283245A (en) * 2013-07-03 2015-01-14 深圳市超创鑫科技有限公司 High-conversion-efficiency mobile power source circuit
CN204103536U (en) * 2014-08-07 2015-01-14 深圳市超创鑫科技有限公司 Portable power source circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104678216A (en) * 2015-02-04 2015-06-03 深圳普瑞赛思检测技术有限公司 Method and device for testing energy or power conversion efficiency of circuit board of mobile power supply
CN105576770A (en) * 2016-02-26 2016-05-11 厦门大学嘉庚学院 Digital lithium battery charging and discharging device

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Application publication date: 20141126

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