CN104300641A - Charging and emergency dual-purpose mobile power source of USB device - Google Patents
Charging and emergency dual-purpose mobile power source of USB device Download PDFInfo
- Publication number
- CN104300641A CN104300641A CN201410587143.7A CN201410587143A CN104300641A CN 104300641 A CN104300641 A CN 104300641A CN 201410587143 A CN201410587143 A CN 201410587143A CN 104300641 A CN104300641 A CN 104300641A
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- Prior art keywords
- charging
- circuit
- pin
- boost converter
- power source
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a charging and emergency dual-purpose mobile power source of a USB device. The mobile power source is characterized in that the power source comprises a 3 V direct current power source, a direct-current-to direct-current-booster circuit, a charging interface circuit and a low-battery-level reminding circuit; the direct-current-to direct-current-booster circuit is composed of a DC-DC booster type convertor IC1, a bypass capacitor C1, an inductance coil L1, an electrolytic capacitor C2 and a Schottky diode D1; the model MAX756 is chosen for the DC-DC booster type convertor IC1; in the charging interface circuit, the sixth pin of the DC-DC booster type convertor IC1 is connected with the cathode of the Schottky diode D1, the anode of an electrolytic capacitor C3 and the anode of a charging terminal VCC1, and the cathode of the electrolytic capacitor C3 is connected with the cathode of a charging terminal GND1. To solve the problem of charging or emergency usage of a lithium battery, two AAA-type Ni-MH charging batteries are adopted to serve as power supplies, output 5V direct current voltage, and serve as the charging or emergency power source of USB port power equipment.
Description
Technical field
The invention belongs to lithium battery emergent charging technical field, is about the emergent dual-purpose portable power source of a kind of USB device charging.
Background technology
The use of the USB device such as current mobile phone widely, but the problem that the USB device power consumptions such as mobile phone are large annoyings everybody always, as: smart mobile phone capacity thousands of MAH easily of lithium battery of being joined, this brings very large worry to USB device users such as mobile phones.In order to solve lithium cell charging or Emergency use problem, the present invention has designed and produced the emergent dual-purpose portable power source of a kind of USB device charging, this portable power source uses two joint 1.2V AAA type nickel-hydrogen chargeable cells as power supply, it is MP3 player, camera, mobile phone, the charging of USB port power consumption equipment or emergency power supply that the 5V direct voltage exported can be used as USB charger, also can be the online charge power supply of they lithium batteries used.This portable power source has the advantages such as practical, good reliability, cost of manufacture are low.
Below describe the core technology content that the emergent dual-purpose portable power source of USB device of the present invention charging is involved in implementation process in detail.
Summary of the invention
Goal of the invention and beneficial effect: the use of the USB device such as current mobile phone widely, but the problem that the USB device power consumptions such as mobile phone are large annoyings everybody always, in order to solve lithium cell charging or Emergency use problem, the present invention has designed and produced the emergent dual-purpose portable power source of a kind of USB device charging, this portable power source uses 1.2V two to save AAA type nickel-hydrogen chargeable cell as power supply, it is MP3 player that the 5V direct voltage exported can be used as USB charger, camera, mobile phone, the charging of USB port power consumption equipment or emergency power supply, also can be the online charge power supply of they lithium batteries used.This portable power source has the advantages such as practical, good reliability, cost of manufacture are low.
Circuit working principle: the core parts that the emergent dual-purpose portable power source circuit of USB device charging uses are DC-DC boost converter, and the model that IC1 selects is MAX756.The input supply voltage of MAX756 is minimum only has 0.7V, and its output dc voltage can be converted to 3.3V or 5V as required.The pulse frequency of DC-DC boost converter IC1 is 0.5MHz, and energy conversion efficiency can reach 87%, the sprocket pulse-frequency modulation control scheme of its to be a kind of time constant be 60 μ S, LED be used for supplying cell electricity lower time remind.
Accompanying drawing explanation
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the invention provides an emergent dual-purpose portable power source of USB device charging.
Embodiment
According to being circuit working schematic diagram and the accompanying drawing explanation of the emergent dual-purpose portable power source of USB device charging shown in accompanying drawing 1, and according to the annexation in each several part circuit described in summary of the invention between components and parts, and the components and parts technical parameter described in execution mode requires that carrying out enforcement can realize the present invention.
Technical scheme: the emergent dual-purpose portable power source of USB device charging, it comprises 3V DC power supply, direct current/direct current booster circuit, charging inlet circuit, the low alert circuit of battery electric quantity, it is characterized in that:
Direct current/direct current booster circuit: it is by DC-DC boost converter IC1, shunt capacitance C1, inductance coil L1, electrochemical capacitor C2, Schottky diode D1 forms, the model that DC-DC boost converter IC1 selects is MAX756, DC-DC boost converter IC1 the 2nd pin and the 7th pin connection circuit ground GND, DC-DC boost converter IC1 the 3rd pin is by shunt capacitance C1 connection circuit ground GND, DC-DC boost converter IC1 the 5th pin and the 8th pin connect inductance coil L1 one end and electrochemical capacitor C2 negative pole and Schottky diode D1 positive pole, the inductance coil L1 other end and electrochemical capacitor C2 positive pole connection circuit positive pole VCC,
Charging inlet circuit: DC-DC boost converter IC1 the 6th pin connects Schottky diode D1 negative pole and electrochemical capacitor C3 positive pole and charging terminal positive pole VCC1, electrochemical capacitor C3 negative pole and meets charging terminal negative pole GND1;
The positive pole connection circuit positive pole VCC of 3V DC power supply, the negative pole connection circuit ground GND and charging terminal negative pole GND1 of 3V DC power supply.
The low alert circuit of battery electric quantity: it is made up of resistance R2, LED and resistance R1, resistance R2 mono-termination DC-DC boost converter IC1 the 5th pin, resistance R2 other end connection circuit positive pole VCC, DC-DC boost converter IC1 the 4th pin connects LED negative pole, and LED positive pole meets DC-DC boost converter IC1 the 1st pin and circuit anode VCC by resistance R1.
The technical parameter of components and parts and selection requirement
IC1 is booster converter, and the model selected is MAX756, and its packing form is 8 pin DIP dual inline types;
D1 is Schottky diode, and the model selected is 1N5818 or 1N5817;
L1 is inductance coil, and its inductance value is 22 μ H, requires operating current >=1A;
LED is light-emitting diode, selects the red high-brightness light emitting diode of direct ￠ 3;
The resistance of resistance R1 is 360 Ω, and the resistance of resistance R1 is 100K Ω, and its power is 1/8W;
C1 is shunt capacitance, and its capacity is 0.1 μ F/10V;
C2, C3 are electrochemical capacitor, and its capacity is respectively 150 μ F/10V, 100 μ F/10V;
DC is 3V DC power supply, uses 1.2V 2 to save AAA type nickel-hydrogen chargeable cell or alkaline battery, also can save 1# general dry battery by Interim use 2.
The making main points of circuit and circuit debugging
Because the circuit structure of the emergent dual-purpose portable power source of USB device charging is fairly simple, comparison easy, as long as the components and parts performance used is intact, the physical connection of components and parts is correct, and circuit does not generally need to carry out debugging and can normally work;
Not key technology of the present invention as the outward appearance of circuit components layout of the present invention, board design, portable power source and size etc., be not all the technology contents of application claims protection, therefore describe in detail no longer one by one in the description;
2nd pin of DC-DC boost converter IC1 has been connected to circuit ground GND by the present embodiment, and VD numerical value is fixed as 5V, therefore the output voltage of circuit is without the need to adjustment;
3V DC power supply of the present invention uses two joint AAA type 1000mAH nickel-hydrogen chargeable cells, and cellular li-ion battery capacity is many at more than 1000mAH now, so the present invention is only suitable for meeting an urgent need, to the charger as cellular li-ion battery, the capacity of two joint nickel-hydrogen chargeable cells must be strengthened significantly.
Claims (2)
1. the emergent dual-purpose portable power source of USB device charging, it comprises 3V DC power supply, direct current/direct current booster circuit, charging inlet circuit, the low alert circuit of battery electric quantity, it is characterized in that:
Described direct current/direct current booster circuit is by DC-DC boost converter IC1, shunt capacitance C1, inductance coil L1, electrochemical capacitor C2, Schottky diode D1 forms, the model that DC-DC boost converter IC1 selects is MAX756, DC-DC boost converter IC1 the 2nd pin and the 7th pin connection circuit ground GND, DC-DC boost converter IC1 the 3rd pin is by shunt capacitance C1 connection circuit ground GND, DC-DC boost converter IC1 the 5th pin and the 8th pin connect inductance coil L1 one end and electrochemical capacitor C2 negative pole and Schottky diode D1 positive pole, the inductance coil L1 other end and electrochemical capacitor C2 positive pole connection circuit positive pole VCC,
In described charging inlet circuit, DC-DC boost converter IC1 the 6th pin connects Schottky diode D1 negative pole and electrochemical capacitor C3 positive pole and charging terminal positive pole VCC1, electrochemical capacitor C3 negative pole and meets charging terminal negative pole GND1;
The positive pole connection circuit positive pole VCC of described 3V DC power supply, the negative pole connection circuit ground GND and charging terminal negative pole GND1 of 3V DC power supply.
2. the emergent dual-purpose portable power source of USB device charging according to claim 1, it is characterized in that: battery electric quantity low alert circuit resistance R2, LED and resistance R1 form, resistance R2 mono-termination DC-DC boost converter IC1 the 5th pin, resistance R2 other end connection circuit positive pole VCC, DC-DC boost converter IC1 the 4th pin connects LED negative pole, and LED positive pole meets DC-DC boost converter IC1 the 1st pin and circuit anode VCC by resistance R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410587143.7A CN104300641A (en) | 2014-10-28 | 2014-10-28 | Charging and emergency dual-purpose mobile power source of USB device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410587143.7A CN104300641A (en) | 2014-10-28 | 2014-10-28 | Charging and emergency dual-purpose mobile power source of USB device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104300641A true CN104300641A (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410587143.7A Pending CN104300641A (en) | 2014-10-28 | 2014-10-28 | Charging and emergency dual-purpose mobile power source of USB device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967163A (en) * | 2015-06-26 | 2015-10-07 | 周芸 | USB port mobile phone lithium battery two-shift charger |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070108945A1 (en) * | 2005-11-17 | 2007-05-17 | Matsushita Electric Works, Ltd. | Charging method, charging circuit, and charging device |
| CN101984536A (en) * | 2010-11-05 | 2011-03-09 | 西安融慧专利产品开发咨询有限责任公司 | Multifunctional mobile phone charger |
| CN201956730U (en) * | 2010-12-31 | 2011-08-31 | 上海广为拓浦电源有限公司 | Portable alternating current power supply externally connected with storage battery |
| CN202340140U (en) * | 2011-12-13 | 2012-07-18 | 朱虹 | Emergency charger for mobile phone lithium battery |
| US20130308230A1 (en) * | 2012-05-21 | 2013-11-21 | Denso Corporation | Charging device |
-
2014
- 2014-10-28 CN CN201410587143.7A patent/CN104300641A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070108945A1 (en) * | 2005-11-17 | 2007-05-17 | Matsushita Electric Works, Ltd. | Charging method, charging circuit, and charging device |
| CN101984536A (en) * | 2010-11-05 | 2011-03-09 | 西安融慧专利产品开发咨询有限责任公司 | Multifunctional mobile phone charger |
| CN201956730U (en) * | 2010-12-31 | 2011-08-31 | 上海广为拓浦电源有限公司 | Portable alternating current power supply externally connected with storage battery |
| CN202340140U (en) * | 2011-12-13 | 2012-07-18 | 朱虹 | Emergency charger for mobile phone lithium battery |
| US20130308230A1 (en) * | 2012-05-21 | 2013-11-21 | Denso Corporation | Charging device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967163A (en) * | 2015-06-26 | 2015-10-07 | 周芸 | USB port mobile phone lithium battery two-shift charger |
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Application publication date: 20150121 |