CN1949620A - Power managing system with multi-charging modes - Google Patents
Power managing system with multi-charging modes Download PDFInfo
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- CN1949620A CN1949620A CN 200610114263 CN200610114263A CN1949620A CN 1949620 A CN1949620 A CN 1949620A CN 200610114263 CN200610114263 CN 200610114263 CN 200610114263 A CN200610114263 A CN 200610114263A CN 1949620 A CN1949620 A CN 1949620A
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Abstract
The invention is a multiple charging mode power supply management system, comprising power supply management circuit, Li ion battery and electrical connector, where the electrical connector comprises two charging interfaces and a power output interface. Indoor, AC adapter is connected with charging interface A, or USB interface is connected with charging interface B; outdoor, photovolt battery is connected with the charging interface A and load is connected with the power output interface; the power supply management circuit comprises intelligent charging circuit, energy source switching circuit, and supply voltage regulating circuit, where the intelligent charging circuit is composed of a chip MAX1874 and the peripheral circuit, DC pin is a shared input end for the AC adapter and photovolt battery, namely the charging interface A, USB pin is an input end of the USB interface, namely the charging interface B; the energy source switching circuit is composed of the MAX1874 externally connected with MOSFETs Q1, Q2 and Q3 and Schottky diodes D1 and D2; and the output end of the energy source switching circuit is connected with the input end of the supply voltage regulating circuit.
Description
Technical field
The present invention relates to a kind of power-supply management system, relate in particular to a kind of power-supply management system for the lithium-ions battery charging with multiple charging modes.
Background technology
Lithium ion battery has been widely used in the digitlization portable equipment in the daily life, as mobile phone, digital camera, notebook computer etc., also be penetrated into the power consumption equipment of every field such as military affairs, national defence, communication gradually, as miniature weapon, wireless senser/actor network, reconnaissance robot etc.Lithium ion battery is generally by commercial power charged, for various mobile devices, be usually used in outdoor load with electric loading or inconvenient artificial charging, exist charging modes single, use inconvenient shortcoming.
As being lithium ion cell charging also, the flexibility of charger will be increased greatly as power supply with photovoltaic cell, USB interface.
Photovoltaic cell is to tie based on semiconductor P-N to accept solar irradiation generation volta effect, directly luminous energy is converted into the Conversion of energy device of electric energy.Its operation principle is: when solar irradiation is mapped to semiconductor surface, the effect acquisition that the valence electron of atom is subjected to photon in inner N district of semiconductor and the P district is above the energy of energy gap and be excited, and the generation electron hole pair is called photo-generated carrier.Under the effect of P-N knot internal electric field, electronics separates with the hole near the photo-generated carrier the P-N knot, and the accumulation that produces the charges of different polarity on P-N knot both sides forms the photoproduction electromotive force.Photovoltaic cell forms the loop at P-N knot both sides extraction electrode, then forms electric current at external circuit.Photovoltaic cell is generally formed by the connection in series-parallel of a plurality of P-N knot, can obtain the power output of different numerical value by the connection in series-parallel number that changes the P-N knot.Photovoltaic energy is a kind of cleaning, regenerative resource.Outdoor, utilize photovoltaic cell to be lithium ion cell charging, will increase the flexibility of charger greatly.For example, the digitlization portable equipment in the daily life (as mobile phone, digital camera, MP3 player and PDA) etc. if use up at outdoor battery electric quantity, adopt supplying power for photovoltaic cell, are undoubtedly a kind of effective solution.For example, the wireless sensor network that use in national defence, military communication field has characteristics such as interstitial content is numerous, deployed environment complexity, and artificial charging is unpractical, adopts the photovoltaic energy power supply, will effectively solve its energy bottleneck.
One of feature that USB standard most worthy but seldom is mentioned can utilize exactly USB interface as power supply to outside power devices.Usb host, as PC and notebook computer, each USB jack can both be supported the electric current output of 500mA, also can be said to and can drive 5 unit loads (in the USB technical term, a unit load refers to 100mA).Self-powered usb hub also can drive 5 unit loads.The usb hub of bus driver can guarantee to drive 1 unit load.The minimum voltage available that is provided by the hub in usb host or charged source is 4.5V, and the minimum voltage that the hub that is driven by usb bus provides is 4.35V.Therefore, USB interface can be powered for external equipment, and can be lithium ion cell charging.Utilize USB interface to give lithium ion cell charging, smaller and more exquisite, light than AC adapter, for power supply provides a kind of new electric weight source.
Patent CN 200420033271.9 discloses a kind of charger for mobile phone that adopts USB interface, and patent CN200520056079.6 discloses a kind of solar mobile phone charging device, and all adopting single charging modes is lithium ion cell charging.The charging of commercial power charged, photovoltaic cell and three kinds of modes of USB interface charging are combined, and different occasions adopt different charging modes, can have complementary advantages, and use flexiblely, and this multifunctional charger yet there are no report at existing document or patent of invention.
In addition, existing charger only possesses charge function, directly powers with lithium ion battery during electricity consumption.If the lithium ion battery deep discharge needs a period of time with lithium ion cell charging to load required voltage, equipment can not commence work without delay like this.Some power consumption equipments as wireless senser/actor network node, robot etc., need continuous operation, and the charger of these function singlenesses can not continue to provide electric energy.As charge power supply being adjusted to the load required voltage, when being lithium ion cell charging, directly be electric, will address the above problem.
Summary of the invention
The objective of the invention is to overcome single, the shortcoming that can't continued power of prior art charging modes, a kind of commercial power charged, photovoltaic cell charging and three kinds of mode combinations of USB charging are provided, and the power-supply management system of continous-stable voltage output can be provided for load.One of AC adapter, USB interface, three kinds of energy of photovoltaic cell are used with power-supply management system of the present invention, can form one and can be lithium ion cell charging, can be the steady voltage source of the continuous power supply of load again.
Power-supply management system of the present invention mainly comprises electric power management circuit, lithium ion battery and electrical connection arrangement.The lithium ion battery product that the present invention selects for use is SL-3100A.Electrical connection arrangement comprises charging inlet A, charging inlet B and power output interface.Because only just can be applied to photovoltaic cell outdoor, so, the shared electrical connection arrangement of AC adapter and photovoltaic cell---charging inlet A.Indoor, can select AC adapter or USB interface for use, AC adapter is connected with charging inlet A, or USB interface is connected with charging inlet B, load is connected with power output interface, is lithium ion cell charging by power-supply management system of the present invention, is electric simultaneously.Under the situation of outdoor no civil power and USB interface, be lithium ion cell charging with photovoltaic cell, be electric simultaneously, connected mode is: photovoltaic cell is connected with charging inlet A, and load is connected with power output interface.Power-supply management system of the present invention provides adjustable voltage output, and charge power supply voltage is adjusted, and can be the electric of multiple different voltage requirements.
Electric power management circuit mainly comprises aptitude chargeable circuit, energy commutation circuit, supply voltage adjustment circuit.
Aptitude chargeable circuit mainly is made of charging chip and peripheral circuit.Charging chip can be realized constant current-constant voltage charge standard.Peripheral circuit comprises overvoltage and under-voltage protecting circuit, and promptly charge power supply only could be lithium ion cell charging in the safe voltage scope, plays the effect of protection charging chip and lithium ion battery.Peripheral circuit can also be realized charged state demonstration, testing environment temperature and functions such as blocking-up charging path, adjustment maximum charging current under limiting temperature.
The function that energy commutation circuit realizes is: under the condition that has charge power supply to insert, cut off the discharge path of lithium ion battery, be electric directly with charge power supply, like this, not only can reduce the accumulative total power consumption of lithium ion battery, increase the useful life of lithium ion battery, and when the lithium ion battery deep discharge, can not be charged to the needed voltage of load at short notice, the electric weight that also can utilize charge power supply to provide with electric loading commences work without delay; When no external power supply, lithium ion battery is an electric.
Supply voltage is adjusted circuit can adjust the output of supply voltage, so that power supply and load are complementary according to the need for electricity of load.
In AC adapter, photovoltaic cell, three kinds of energy of USB interface any one and power-supply management system of the present invention are used and can form the complete Miniature Power Unit that can power continuously.
In sum, compare with existing power-supply management system, power-supply management system of the present invention has the following advantages:
1, power-supply management system can be a lithium ion cell charging in the different charge power supply of different occasions employings, is electric simultaneously, has very big flexibility.
2, when indoor application, can adopt USB interface is lithium ion cell charging, smaller and more exquisite, light than AC adapter.
3, under the condition of outdoor no civil power and USB interface, can utilize the photovoltaic cell charging.
4, power-supply system can have widespread popularity for the electric of various different voltage requirements.
5, when the lithium ion battery deep discharge, the electric energy that load also can utilize charge power supply to provide commences work without delay, and has practicality.
6, circuit logic is reasonable in design, has taken into full account lithium ion battery and has had unsafe factor, has designed aptitude chargeable circuit and protective circuit, can effectively prevent the lithium ion battery infringement, even blast.
This power-supply management system volume is little, easy to carry, be easy to promote, can use the portable equipment in the daily life, as mobile phone, notebook computer etc., also can be applied to the micro device in the technical fields such as military affairs away from electrical network, field work, national defence, communication,, be with a wide range of applications as wireless senser/actor network, miniature weapon, reconnaissance robot etc.
Description of drawings
Fig. 1 is a power-supply management system schematic diagram of the present invention.
Fig. 2 is the electric power management circuit schematic diagram, among the figure: 201 charging circuits, 202 power supply switch circuits, 203 supply voltages are adjusted circuit;
Fig. 3 is the electric power management circuit schematic diagram.
Embodiment
Power-supply management system of the present invention is a lithium ion cell charging in indoor AC adapter or the USB interface selected for use, is electric simultaneously.As shown in Figure 1, AC adapter is connected with charging inlet A, or USB interface is connected with charging inlet B, and load is connected with power output interface.As select the lithium ion battery of 700mAh for use, with the sensor network nodes is load (average operating current is 10mA), with AC adapter charging (charging current is set to 500mA) or with USB interface (can drive 5 unit loads) is lithium ion cell charging when powering for sensor network nodes, can be full of about 2 hours.
Under the situation of outdoor no civil power and USB interface, be that lithium ion cell charging is electric simultaneously with photovoltaic cell.As shown in Figure 1, connected mode is: photovoltaic cell is connected with charging inlet A, and load is connected with power output interface.Still selecting the lithium ion battery of 700mAh for use, is load (average operating current is 10mA) with the sensor network nodes.Photovoltaic cell is of a size of 130mm * 115mm, and recommended current is 300mA (AM1.5, t=25 a ℃).Under etalon optical power, need lithium ion battery was full of in 2-3 hour.
The electric power management circuit schematic block diagram mainly comprises aptitude chargeable circuit 201, energy commutation circuit 202, supply voltage adjustment circuit 203 as shown in Figure 2, and each circuit module schematic diagram is seen Fig. 3 and following detailed description.
As shown in Figure 3, aptitude chargeable circuit 201 mainly is made of charging chip MAX1874 and peripheral circuit thereof.The input of AC adapter or photovoltaic cell and DC pin join.The input termination USB pin of USB interface.The BATT pin connects lithium ion cell positive.Connect MOSFET Q1 between DC pin and the DCLV pin.The external pull-up resistor R1 of DCOK, and join with the Q1 grid.LED D3 and divider resistance R2 series connection, anodal and CHG pin joins, and negative pole connects the BYP pin.External thermistor R3 is connected between REF pin and the THRM pin.Connecting resistance R4 between DC1 pin and the REF pin, and connecting resistance R5 between the GND.The USEL pin can connect low level also can connect high level, is connected with the USB pin when connecing high level, is connected with the GND pin when connecing low level.Charging chip MAX1874 internal logic circuit can be realized constant current-constant voltage charge standard.Have only as 3.5V≤V
DCDuring≤6.2V, promptly in the safe charging voltage range, the DCOK output low level, the Q1 conducting, DC pin external power supply could be charged to electric energy in the lithium ion battery by DCLV, plays like this charging chip overvoltage/under-voltage protection effect.When chip charges, the output of CHG low level, indicator light LED D3 is bright, and when chip did not charge, indicator light D3 went out, and played the effect of indication charged state like this.By adjusting R3 resistance size, the allowable temperature scope can be set, when surpassing the allowable temperature scope, the THRM end stops to be lithium ion cell charging.When the DC pin inserts power supply, R4, R5 resistance size adjustment DC end maximum charging current are set.When charging with USB interface, can be according to the current capacity of USB, corresponding USEL end high-low level is set adjusts charging current: the USEL pin connects high level, selects the 500mA maximum charging current, and the USEL pin connects low level, selects the 100mA maximum charging current.
As shown in Figure 3, energy commutation circuit 202 mainly is made up of external MOSFET Q1, Q2, Q3 and Schottky diode D1, the D2 of MAX1874.MOSFET Q1, Q2, Q3 are connected on respectively between the IN pin of DC pin, USB pin, BATT pin and MAX8880 of MAX1874.The grid of Q1, Q2 is connected on respectively on DCOK pin, UOK pin, the PON pin.D1, D2 are serially connected in respectively between the IN pin of DCLV pin, USB pin and MAX8880 of MAX1874.When DC end or USB end have power supply to insert, the POK end is closed Q3, and lithium ion battery and load disconnect, DCOK or UOK output low level, corresponding M OSFET Q1 or Q2 conducting, charge power supply can power to the load by the path that D1 or D2 form.Like this, can not only reduce the accumulative total power consumption of lithium ion battery, increase the useful life of lithium ion battery, and when the lithium ion battery deep discharge, can not be charged to the needed voltage of load at short notice, the electric weight that also can utilize charge power supply to provide with electric loading commences work without delay.D1 and D2 can block the reverse current between power supply circuits and the input.
As shown in Figure 3, supply voltage is adjusted circuit 203 and is mainly realized voltage stabilizing output and voltage adjustment by voltage stabilizing chip MAX8880 and outer meeting resistance.The negative pole of IN pin and D1, D2 and the drain electrode of Q3 are joined, and the OUT pin connects uses electric loading.Resistance R 6 is connected between OUT pin and the FB pin, and resistance R 7 is connected between FB and the GND.MAX8880 can be embodied as load provides stable voltage output.According to the voltage requirements of load, adjust the size of output voltage by the resistance size of adjusting outer meeting resistance R6 and R7.
Claims (4)
1, the power-supply management system of one kind of multiple charging modes is characterized in that comprising electric power management circuit, lithium ion battery and electrical connection arrangement, and electrical connection arrangement comprises 2 charging inlet A, B and 1 power output interface; Indoor, AC adapter is connected with charging inlet A, or USB interface is connected with charging inlet B, and outdoor, photovoltaic cell is connected with charging inlet A, and load is connected with power output interface; Electric power management circuit mainly comprises aptitude chargeable circuit (201), energy commutation circuit (202), supply voltage adjustment circuit (203); Aptitude chargeable circuit (201) is made of chip MAX1874 and peripheral circuit, and the DC pin is AC adapter and photovoltaic cell shared input, i.e. charging inlet A, and the USB pin is the input of USB interface, i.e. charging inlet B; Energy commutation circuit (202) is made up of the external MOSFET Q1 of MAX1874, Q2, Q3 and Schottky diode D1, D2 in the charging circuit (201); The output of energy commutation circuit (202) is connected with the input that supply voltage is adjusted circuit (203), i.e. the drain electrode of the negative pole of D1, D2 and Q3 is connected with the IN pin of MAX8880, by changing the outer meeting resistance resistance adjustable output voltage size of MAX8880.
2, according to the power-supply management system of the described multiple charging modes of claim 1, it is characterized in that in the aptitude chargeable circuit (201), the input of AC adapter or photovoltaic cell and DC pin join, the input termination USB pin of USB interface, the BATT pin connects lithium ion cell positive, connect MOSFET Q1 between DC pin and the DCLV pin, the external pull-up resistor R1 of DCOK, and join with the Q1 grid; LED D3 and divider resistance R2 series connection, anodal and CHG pin joins, and negative pole connects the BYP pin; External thermistor R3 is connected between THRM pin and the GND pin; Connecting resistance R4 between DC1 pin and the REF pin, and connecting resistance R5 between the GND; The USEL pin can connect low level also can connect high level; Have only as 3.5V≤V
DCDuring≤6.2V, promptly in the safe charging voltage range, the DCOK output low level, the Q1 conducting, DC pin external power supply could be charged to electric energy in the lithium ion battery by DCLV.
3, according to the power-supply management system of the described multiple charging modes of claim 1, it is characterized in that in the energy commutation circuit (202) that MOSFET Q1, Q2, Q3 are connected on respectively between the IN pin of DC pin, USB pin, BATT pin and MAX8880 of MAX1874; The grid of Q1, Q2 is connected on respectively on DCOK pin, UOK pin, the PON pin; D1, D2 are serially connected in respectively between the IN pin of DCLV pin, USB pin and MAX8880 of MAX1874.
4, according to the power-supply management system of the described multiple charging modes of claim 1, it is characterized in that the negative pole of IN pin and D1, D2 and the drain electrode of Q3 are joined in the supply voltage adjustment circuit (203), the OUT pin connects uses electric loading; Resistance R 6 is connected between OUT pin and the FB pin, and resistance R 7 is connected between FB and the GND; According to the voltage requirements of load, adjust the size of output voltage by the resistance size of regulating outer meeting resistance R6 and R7.
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| CN 200610114263 CN1949620A (en) | 2006-11-03 | 2006-11-03 | Power managing system with multi-charging modes |
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| CN 200610114263 CN1949620A (en) | 2006-11-03 | 2006-11-03 | Power managing system with multi-charging modes |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101295916B (en) * | 2007-04-27 | 2011-05-18 | 泰商泰达电子公司 | Electronic device with electric power connection interface |
| WO2012048454A1 (en) * | 2010-10-10 | 2012-04-19 | 深圳市威特宝科技发展有限公司 | Wireless charging device for mobile phone |
| CN102497007A (en) * | 2011-11-29 | 2012-06-13 | 中国电子科技集团公司第五十八研究所 | Power management system of wireless acquisition node |
| CN101827174B (en) * | 2010-02-03 | 2012-07-25 | 哈尔滨工业大学 | Mobile phone data backup device with multiple data exchange ways and charging function |
| CN101364745B (en) * | 2007-08-08 | 2012-09-05 | 鹏智科技(深圳)有限公司 | Electronic apparatus capable of automatically choosing power supply source |
| CN102904329A (en) * | 2011-07-29 | 2013-01-30 | 富泰华工业（深圳）有限公司 | Power supply management circuit |
| TWI456864B (en) * | 2012-03-09 | 2014-10-11 | Acer Inc | Charging source detection switch apparatus |
| CN104184116A (en) * | 2013-05-22 | 2014-12-03 | 富泰华工业（深圳）有限公司 | Protection circuit and electronic device provided with protection circuit |
| CN105471003A (en) * | 2014-08-26 | 2016-04-06 | 深圳富泰宏精密工业有限公司 | Charging circuit |
| CN107968478A (en) * | 2018-01-18 | 2018-04-27 | 顺德职业技术学院 | A kind of solar charging device and control method for sweeping robot |
| CN110383618A (en) * | 2018-09-12 | 2019-10-25 | Oppo广东移动通信有限公司 | Charge management circuit, terminal and charging method |
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- 2006-11-03 CN CN 200610114263 patent/CN1949620A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101295916B (en) * | 2007-04-27 | 2011-05-18 | 泰商泰达电子公司 | Electronic device with electric power connection interface |
| CN101364745B (en) * | 2007-08-08 | 2012-09-05 | 鹏智科技(深圳)有限公司 | Electronic apparatus capable of automatically choosing power supply source |
| CN101827174B (en) * | 2010-02-03 | 2012-07-25 | 哈尔滨工业大学 | Mobile phone data backup device with multiple data exchange ways and charging function |
| WO2012048454A1 (en) * | 2010-10-10 | 2012-04-19 | 深圳市威特宝科技发展有限公司 | Wireless charging device for mobile phone |
| CN102904329B (en) * | 2011-07-29 | 2016-04-20 | 富泰华工业（深圳）有限公司 | Electric power management circuit |
| CN102904329A (en) * | 2011-07-29 | 2013-01-30 | 富泰华工业（深圳）有限公司 | Power supply management circuit |
| CN102497007B (en) * | 2011-11-29 | 2013-11-13 | 中国电子科技集团公司第五十八研究所 | Power management system of wireless acquisition node |
| CN102497007A (en) * | 2011-11-29 | 2012-06-13 | 中国电子科技集团公司第五十八研究所 | Power management system of wireless acquisition node |
| TWI456864B (en) * | 2012-03-09 | 2014-10-11 | Acer Inc | Charging source detection switch apparatus |
| CN104184116A (en) * | 2013-05-22 | 2014-12-03 | 富泰华工业（深圳）有限公司 | Protection circuit and electronic device provided with protection circuit |
| CN104184116B (en) * | 2013-05-22 | 2018-04-27 | 富泰华工业（深圳）有限公司 | Protect circuit and the electronic device with the protection circuit |
| CN105471003A (en) * | 2014-08-26 | 2016-04-06 | 深圳富泰宏精密工业有限公司 | Charging circuit |
| CN107968478A (en) * | 2018-01-18 | 2018-04-27 | 顺德职业技术学院 | A kind of solar charging device and control method for sweeping robot |
| CN110383618A (en) * | 2018-09-12 | 2019-10-25 | Oppo广东移动通信有限公司 | Charge management circuit, terminal and charging method |
| US11381102B2 (en) | 2018-09-12 | 2022-07-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging management circuit, terminal and charging method |
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