CN105610224A - Mobile power supply - Google Patents
Mobile power supply Download PDFInfo
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- CN105610224A CN105610224A CN201610132840.2A CN201610132840A CN105610224A CN 105610224 A CN105610224 A CN 105610224A CN 201610132840 A CN201610132840 A CN 201610132840A CN 105610224 A CN105610224 A CN 105610224A
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- Prior art keywords
- oxide
- semiconductor
- metal
- charging
- output interface
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention provides a mobile power supply. The mobile power supply comprises a rechargeable battery, a charging main circuit, a microprogrammed control unit (MCU) microprocessor and an output interface, wherein the charging main circuit is connected with the MCU microprocessor and the output interface respectively and used for selecting a corresponding working mode according to the control of the MCU microprocessor and outputting a corresponding charging current to the output interface, and the MCU microprocessor is connected with the output interface and used for acquiring a charging current required by a charged device according to a battery voltage of the charged device so as to control the working mode of the charging main circuit and make the charging current output from the output interface smaller than the charging current required by the charged device. The voltage of the mobile power supply provided by the invention follows with the battery voltage of a portable electronic device which is charged all the time, the comprehensive charging efficiency reaches over 90%, and the charging efficiency is greatly improved.
Description
Technical field
The present invention relates to electronic equipment charging technique field, be specifically related to a kind of portable power source.
Background technology
Along with scientific and technological development, the function of portable electric appts also from strength to strength, for people provideMore convenient and selection, but its power consumption is also increasing. Existing battery capacity can not meetUser's demand, need to adopt portable power source to come to charging portable electronic apparatus, so that portableElectronic equipment has enough flying power for a long time.
Because lithium battery has the features such as volume is relatively small and exquisite, capacity is large, market circulation is wide, moderate,Therefore portable electric appts generally all uses lithium battery power supply. Portable power source is in portable electric apptsLithium cell charging time, adopt the boosting mode of DCTODC, need the battery in portable power sourceVoltage be first elevated to 5V, then drop to after 2.7-4.2V, just for the lithium battery in portable electric appts fillsElectricity.
At present, normally used portable power source, its volume, capacity etc. have been accomplished the limit, institute thinks fullFoot user demand, can only set about from the charge efficiency that improves portable power source. Because existing portable power source is depositedThe situation of step-down again after formerly boosting, so can make its charge efficiency greatly reduce, chargeable number of times reduces.Suppose the voltage of the portable power source of 3.7V, a 10AH to be first elevated to 5V, its capacity is 5V, 7.4AH,Be 74% conversion efficiency. The efficiency of supposing this DCTODC boosting mode is 80%, then by 5VVoltage be charged in the lithium battery of portable electric appts, its voltage is 3.7V, efficiency is 74%, soThe charge efficiency of entirety is 43.8% (74% × 80% × 74%=43.8%), and charge efficiency is lower, nothingMethod meets actual charging demand.
Summary of the invention
The invention provides a kind of portable power source, lower to solve portable power source charge efficiency of the prior artProblem.
The invention provides a kind of portable power source, described portable power source comprise rechargeable battery, charging main circuit,MCU microprocessor and output interface;
Described rechargeable battery, for to described charging main circuit and described MCU microprocessor power supply;
Described charging main circuit, adopts step-up/step-down circuit structure, respectively with described MCU microprocessor andDescribed output interface connects, for selecting corresponding Working mould according to the control of described MCU microprocessorFormula, exports corresponding charging current to described output interface;
Described MCU microprocessor, is connected with described output interface, for basis and described output interfaceConnect by the cell voltage of charging equipment, obtain described by the required charging current of charging equipment, therebyControl the mode of operation of described charging main circuit, described in the charging current that described output interface is exported is less thanBy the required charging current of charging equipment;
Described MCU microprocessor is also for according to the battery electric quantity of described rechargeable battery, determine whether toDescribedly charged by charging equipment.
As optimal way of the present invention, described charging main circuit comprise first half-bridge MOS drive chip,The second half-bridge MOS drives chip, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor, the 4thMetal-oxide-semiconductor, inductance and electric capacity;
Wherein, the first half-bridge MOS drives chip and the second half-bridge MOS to drive the input pin difference of chipBe connected with the PWM interface of described MCU microprocessor, described the first half-bridge MOS drives the defeated of chipGo out pin and be connected with the grid of described the first metal-oxide-semiconductor and described the second metal-oxide-semiconductor respectively, described the second half-bridgeThe output pin that MOS drives chip respectively with the grid of described the 3rd metal-oxide-semiconductor and described the 4th metal-oxide-semiconductorConnect; The drain electrode of described the first metal-oxide-semiconductor is connected with the positive pole of described rechargeable battery, a described MOSThe source electrode of pipe is connected with the drain electrode of described the second metal-oxide-semiconductor and one end of described inductance respectively, described inductanceThe other end is connected with the drain electrode of described the 3rd metal-oxide-semiconductor and described the 4th metal-oxide-semiconductor respectively, and the described the 4thThe source electrode of metal-oxide-semiconductor is connected with the anode of described electric capacity and the positive pole of described output interface respectively; Described secondMetal-oxide-semiconductor and described the 3rd source electrode of metal-oxide-semiconductor and the equal ground connection of the negative terminal of described electric capacity.
As optimal way of the present invention, the AD pin of described MCU microprocessor respectively with described chargingThe positive pole of battery is connected with the positive pole of described output interface, the negative pole of described rechargeable battery also with described outputThe negative pole of interface connects.
As optimal way of the present invention, the charging current of described output interface output is established by charging than describedStandby required charging current is little by 5%.
Portable power source provided by the invention, its charging main circuit adopts step-up/step-down circuit structure, makes mobileThe voltage of power supply is followed the cell voltage of the portable electric appts being charged all the time, do not exist boost after againThe situation of step-down, makes overall charge efficiency up to more than 90%, and charge efficiency improves greatly, thereby makesThe portable power source utilization rate of volume and capacity is higher equally, charging times is more, charging is more reliable.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, in describing embodiment belowThe accompanying drawing of required use is briefly described, and apparently, the accompanying drawing in the following describes is only thisSome embodiment of invention, for those of ordinary skill in the art, are not paying creative workUnder prerequisite, can also obtain according to these accompanying drawings other accompanying drawing.
The structured flowchart of a kind of portable power source that Fig. 1 provides for the embodiment of the present invention;
The circuit theory diagrams of a kind of portable power source that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to thisBright embodiment is described in further detail.
The embodiment of the invention discloses a kind of portable power source, shown in Fig. 1, this portable power source comprises and fillingElectricity battery, charging main circuit, MCU microprocessor and output interface. Wherein, rechargeable battery is used for to fillingElectricity main circuit and MCU microprocessor power supply; Charging main circuit adopts step-up/step-down circuit structure, respectively withMCU microprocessor is connected with output interface, corresponding for selecting according to the control of MCU microprocessorMode of operation, exports corresponding charging current to output interface; MCU microprocessor is connected with output interface,For according to be connected with output interface by the cell voltage of charging equipment, obtain by charging equipment requiredCharging current, thereby the mode of operation of control charging main circuit, make the charging current of output interface output littleIn by the required charging current of charging equipment; MCU microprocessor is also for according to the battery electricity of rechargeable batteryAmount, determines whether to being charged by charging equipment.
Preferably, in the present embodiment, the charging current ratio of output interface output is by required the filling of charging equipmentElectricity electric current is little by 5%.
Shown in Fig. 2, particularly, the embodiment of the present invention also provides a kind of circuit theory of portable power sourceFigure. Wherein, charging main circuit comprises that the first half-bridge MOS drives chip, the second half-bridge MOS to drive coreSheet, the first metal-oxide-semiconductor SW1, the second metal-oxide-semiconductor SW2, the 3rd metal-oxide-semiconductor SW3, the 4th MOSPipe SW4, inductance L and capacitor C. Wherein, the first half-bridge MOS drives chip and the second half-bridge MOSDrive the input pin of chip to be connected with the PWM interface of MCU microprocessor respectively, the first half-bridge MOSDrive the output pin of chip to be connected with the grid of the first metal-oxide-semiconductor SW1 and the second metal-oxide-semiconductor SW2 respectively,Second half-bridge MOS drive chip output pin respectively with the 3rd metal-oxide-semiconductor SW3 and the 4th metal-oxide-semiconductorThe grid of SW4 connects; The drain electrode of the first metal-oxide-semiconductor SW1 is connected with the positive pole of rechargeable battery BT, theThe source electrode of one metal-oxide-semiconductor SW1 is connected with the second drain electrode of metal-oxide-semiconductor SW2 and one end of inductance L respectively,The other end of inductance L is connected with the drain electrode of the 3rd metal-oxide-semiconductor SW3 and the 4th metal-oxide-semiconductor SW4 respectively,The source electrode of the 4th metal-oxide-semiconductor SW4 is connected with the anode of capacitor C and the positive pole of output interface J1 respectively;The second metal-oxide-semiconductor SW2 and the 3rd source electrode of metal-oxide-semiconductor SW3 and the equal ground connection of the negative terminal of capacitor C.
The AD pin of MCU microprocessor respectively with the positive pole of rechargeable battery BT and the positive pole of output interface J1Connect, the negative pole of rechargeable battery BT is also connected with the negative pole of output interface J1.
In addition, in the present embodiment, output interface J1 adopts USB interface, can conveniently with by charging establishStandby connection.
The portable power source that the present embodiment provides can charge to self by external power source, and can pass throughTo the electronic equipment power supply to be charged being attached thereto.
In the portable power source that the present embodiment provides, first detect filling of portable power source by MCU microprocessorThe electric weight of electricity battery, confirms the voltage of rechargeable battery of portable power source, when the rechargeable battery of portable power sourceVoltage is during lower than certain value, and portable power source stops to being charged by charging equipment, opens and is given by external power sourceThe path of portable power source charging, treats that the electric weight of the rechargeable battery of portable power source is greater than certain value ability afterwardsCharged by charging equipment. Secondly, detected by the cell voltage of charging equipment by MCU microprocessor,Analyze, calculate by the needed charging current of charging equipment, then control charging main circuit working method andCharging current, guarantees that the charging current of portable power source output is than little by the required charging current of charging equipment5％。
Particularly, portable power source mainly carries out work by following three kinds of mode of operations:
(1) when the cell voltage of portable power source is when by the cell voltage of charging equipment, micro-by MCUThe action of the corresponding switching tube of processor control, by the first metal-oxide-semiconductor SW1, the second metal-oxide-semiconductor SW2,Inductance L composition synchronous buck (buck) circuit structure, the charging current that makes portable power source output all the time thanLittle by 5% by the required charging current of charging equipment, make the voltage follow of portable power source output be established by charging simultaneouslyStandby cell voltage keeps the 3rd metal-oxide-semiconductor SW3 shutoff, the 4th metal-oxide-semiconductor SW4 conducting shape simultaneouslyState; When detecting while being full of by the battery electric quantity of charging equipment, MCU microprocessor quits work.
(2) when the cell voltage of portable power source is when by the cell voltage of charging equipment, micro-by MCUThe action of the corresponding switching tube of processor control, by the 3rd metal-oxide-semiconductor SW3, the 4th metal-oxide-semiconductor SW4,Inductance L composition synchronous boost (boost) circuit structure, the charging current that makes portable power source output all the time thanLittle by 5% by the required charging current of charging equipment, make the voltage follow of portable power source output be established by charging simultaneouslyStandby cell voltage keeps the second metal-oxide-semiconductor SW2 shutoff, the first metal-oxide-semiconductor SW1 conducting shape simultaneouslyState; When detecting while being full of by the battery electric quantity of charging equipment, MCU microprocessor quits work.
(3) in the time that the cell voltage of portable power source equals by the cell voltage of charging equipment, according to the following stepsCarry out: a, moved by the corresponding switching tube of MCU microprocessor control, by the first metal-oxide-semiconductor SW1,The 4th metal-oxide-semiconductor SW4, inductance L composition linear circuit structure, the charging current that portable power source is exportedAll the time than little by 5% by the required charging current of charging equipment, make the voltage follow quilt of portable power source output simultaneouslyThe cell voltage of charging equipment keeps the second metal-oxide-semiconductor SW2, the 3rd metal-oxide-semiconductor SW3 to turn-off simultaneouslyState; When detecting, MCU microprocessor stops charging while being full of by the battery electric quantity of charging equipment; B,On the basis of step a, MCU microprocessor detects by the required charging current of charging equipment, treats stepA carried out after the regular hour, and startup synchronous voltage booster circuit structure enters the second mode of operation and carries out work.
In addition, in the process of charging, during by the charging of every kind of duty of MCU microprocessor recordsBetween, every kind of duty is limited by the different charging intervals all, reaches the charging interval afterwards by the micro-place of MCUReason device is controlled, and cuts off portable power source and by the loop between charging equipment.
Portable power source provided by the invention, its charging main circuit adopts step-up/step-down circuit structure, adopts correspondingMultiple-working mode, make the voltage of portable power source follow all the time the cell voltage of electronic equipment, do not depositThe situation of step-down again after boosting, makes overall charge efficiency up to more than 90%, and charge efficiency is carried greatlyHeight, thus make the portable power source utilization rate of same volume and capacity higher, charging times is more, charging moreReliably.
It should be noted that, the portable electronic being charged that referred to by charging equipment described in description is establishedStandby.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, not all in the present inventionSpirit and principle within, any amendment of doing, be equal to replacement, improvement etc., all should be included in thisWithin bright protection domain.
Claims (4)
1. a portable power source, is characterized in that, described portable power source comprises rechargeable battery, main electricity chargesRoad, MCU microprocessor and output interface;
Described rechargeable battery, for to described charging main circuit and described MCU microprocessor power supply;
Described charging main circuit, adopts step-up/step-down circuit structure, respectively with described MCU microprocessor andDescribed output interface connects, for selecting corresponding Working mould according to the control of described MCU microprocessorFormula, exports corresponding charging current to described output interface;
Described MCU microprocessor, is connected with described output interface, for basis and described output interfaceConnect by the cell voltage of charging equipment, obtain described by the required charging current of charging equipment, therebyControl the mode of operation of described charging main circuit, described in the charging current that described output interface is exported is less thanBy the required charging current of charging equipment;
Described MCU microprocessor also, for according to the battery electric quantity of described rechargable battery, determines whether to instituteState by charging equipment and charge.
2. portable power source according to claim 1, is characterized in that, described charging main circuit comprisesThe first half-bridge MOS drives chip, the second half-bridge MOS to drive chip, the first metal-oxide-semiconductor, the 2nd MOSPipe, the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, inductance and electric capacity;
Wherein, the first half-bridge MOS drives chip and the second half-bridge MOS to drive the input pin difference of chipBe connected with the PWM interface of described MCU microprocessor, described the first half-bridge MOS drives the defeated of chipGo out pin and be connected with the grid of described the first metal-oxide-semiconductor and described the second metal-oxide-semiconductor respectively, described the second half-bridgeThe output pin that MOS drives chip respectively with the grid of described the 3rd metal-oxide-semiconductor and described the 4th metal-oxide-semiconductorConnect; The drain electrode of described the first metal-oxide-semiconductor is connected with the positive pole of described rechargeable battery, a described MOSThe source electrode of pipe is connected with the drain electrode of described the second metal-oxide-semiconductor and one end of described inductance respectively, described inductanceThe other end is connected with the drain electrode of described the 3rd metal-oxide-semiconductor and described the 4th metal-oxide-semiconductor respectively, and the described the 4thThe source electrode of metal-oxide-semiconductor is connected with the anode of described electric capacity and the positive pole of described output interface respectively; Described secondMetal-oxide-semiconductor and described the 3rd source electrode of metal-oxide-semiconductor and the equal ground connection of the negative terminal of described electric capacity.
3. portable power source according to claim 1, is characterized in that, described MCU microprocessorAD pin be connected with the positive pole of described rechargeable battery and the positive pole of described output interface respectively, described chargingThe negative pole of battery is also connected with the negative pole of described output interface.
4. portable power source according to claim 1, is characterized in that, described output interface outputCharging current is less by 5% by the required charging current of charging equipment than described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610132840.2A CN105610224A (en) | 2016-03-09 | 2016-03-09 | Mobile power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610132840.2A CN105610224A (en) | 2016-03-09 | 2016-03-09 | Mobile power supply |
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| CN105610224A true CN105610224A (en) | 2016-05-25 |
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| CN201610132840.2A Pending CN105610224A (en) | 2016-03-09 | 2016-03-09 | Mobile power supply |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203261080U (en) * | 2013-05-15 | 2013-10-30 | 立锜科技股份有限公司 | Bi-directional switching type power supply device and control circuit thereof |
| EP2685635A1 (en) * | 2012-07-11 | 2014-01-15 | Samsung Electronics Co., Ltd | Apparatus and method for supplying power in a mobile terminal using buck-boost converters |
| CN104143850A (en) * | 2014-08-20 | 2014-11-12 | 南京矽力杰半导体技术有限公司 | Battery charge and discharge management circuit and electronic device applying same |
| CN204216600U (en) * | 2014-09-25 | 2015-03-18 | 深圳市大乘科技股份有限公司 | Synchronization lifting piezoelectric battery charging device |
| CN205489672U (en) * | 2016-03-09 | 2016-08-17 | 西安后羿半导体科技有限公司 | Mobile power supply |
-
2016
- 2016-03-09 CN CN201610132840.2A patent/CN105610224A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2685635A1 (en) * | 2012-07-11 | 2014-01-15 | Samsung Electronics Co., Ltd | Apparatus and method for supplying power in a mobile terminal using buck-boost converters |
| CN203261080U (en) * | 2013-05-15 | 2013-10-30 | 立锜科技股份有限公司 | Bi-directional switching type power supply device and control circuit thereof |
| CN104143850A (en) * | 2014-08-20 | 2014-11-12 | 南京矽力杰半导体技术有限公司 | Battery charge and discharge management circuit and electronic device applying same |
| CN204216600U (en) * | 2014-09-25 | 2015-03-18 | 深圳市大乘科技股份有限公司 | Synchronization lifting piezoelectric battery charging device |
| CN205489672U (en) * | 2016-03-09 | 2016-08-17 | 西安后羿半导体科技有限公司 | Mobile power supply |
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Effective date of registration: 20180208 Address after: Caotan economic and Technological Development Zone, eco industrial park in Shaanxi city of Xi'an province is 710000 Jilu No. 8928 Applicant after: Xi'an Hua Yi Electronic Limited by Share Ltd Address before: Yanta District 710054 Shaanxi city of Xi'an province Yong song Road No. 18 Qiutao Pavilion 1 room 40501 Applicant before: XI'AN HOOYI SEMICONDUCTOR TECHNOLOGY CO., LTD. |
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Address after: 710000 No. 8928, Shang Ji Road, an ecological industrial park in Xi'an, Shaanxi economic and Technological Development Zone Applicant after: Huayi Microelectronics Co., Ltd. Address before: 710000 No. 8928, Shang Ji Road, an ecological industrial park in Xi'an, Shaanxi economic and Technological Development Zone Applicant before: Xi'an Hua Yi Electronic Limited by Share Ltd |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20160525 |